Alpine KTA-450 Power Pack
Jason from York, PA on 9/14/2023
2014 Chevrolet Silverado 1500
Man I'm so glad i purchased this. Crisp clear and loud!! Just what i was lookin for.
Pros: Easy setup!!
Cons: N O N E
0 of 0 found this helpful
Wow
Derek from Salem, OR on 9/3/2023
2019 Jeep Wrangler
So much power in such a tiny package. Couldn't be happier.
Pros: Tiny Powerful High quality
Cons: Longer harness would have been nice
0 of 0 found this helpful
Flip the switches!
Jeremiah from Mooresville, NC on 8/18/2023
Nice sound once I got the settings dialed in right. Fits together easily with Alpine ilx 650. Only ding I have right now is the dip switches are upside down from the diagram making it a bit problematic setting up right. One other thing is that the metra bracket half covers the switches and dials when mounted together with the receiver. I used a small round file to grind the bracket back for the gain dials.
Pros: Sound
Cons: Switch orientation vs diagram
0 of 0 found this helpful
Amp ok, customer service worse!
Lee from CONWAY, PA on 7/31/2023
2015 Chevrolet Camaro
It's an ok amp nothing to write home about. At least it is better than the non-existent customer support!
Pros:
Cons:
1 of 2 found this helpful
Great little amp
Todd from Wauconda, IL on 6/27/2023
2012 Jeep Wrangler
My first amplifier install, it was much easier than I anticipated. I was convinced before starting that it was going to be rocket science, it was not!
Pros: Small, easy to install, and produces great sound.
Cons: The instructions are a little convoluted, if you arent used to wire diagrams they can be confusing. Crutchfield offered no instructions for the amp install.
1 of 1 found this helpful
Can't recommend
D from Austin on 5/30/2023
2020 Toyota Tacoma
Can't recommend this. Has been totally finicky, even though I was assured I could use it with the auto-on feature. The instructions for this particular product are awful. Finally brought it to a pro audio shop and they just told me it was fried. Other reviews on here seem to reference getting multiple bad units too. Bought an amp directly from them to solve it. Unfortunate because the buying process and install support from Crutchfield is so great but I don't think this product should be supported.
Pros: Small, powerful
Cons: Really tough instructions, not for faint of heart, seems to work randomly, don't recommend leveraging the "auto-on" feature at all.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Jeff from TULSA, OK on 5/23/2023
0 of 0 found this helpful
Perfect companion for my Alpine iLx
Greg from ESTERO, FL on 5/15/2023
Really cranks! Clean sound
Pros: Hides away nicely behind tuner with supplied hardware
Cons: Don't forget to adjust the gain before it's buried in the dash behind the tuner.
0 of 0 found this helpful
Speaker turn on popping w/ Alpine HU + KTA
Crutchfield customer from Wellfleet, MA on 5/10/2023
2017 Jeep Wrangler
Setup: Alpine ILX-507 and this amp. 2017 Wrangler JK. Amp and HU grounded separately to vehicle ground passenger footwell. Remote turn on wire used from HU for amp and sub. Soldered and twisted connections. RCA outs. Powered 8" Kenwood sub. Seperate power wires for sub and amp. Polk mm6502 front and rear. Issues: Turn on pop. Called Alpine and Crutchfield. Very disappointed with Alpine-they are zero help. It is your amp and HU. No wat to delay remote turn on wire from HU. Not the only person reporting either. Crutchfield confirmed I need a delay turn on trigger. Installing that this week PAC TR7, if does not solve, I am eating the amp as took a few months to get around install (my fault). Observations:It is small so opens up mounting options in dash area.Sound is good. only needed to bump up front rear speakers. No power on light, but matters little since it is tucked under the glove box, be nice to have during install/testing. Opinion-Get another amp, the stealth size promise is great. It is not worth that reason to get. Find a spot to mount a non stealth sized amp.
Pros:
Cons:
2 of 2 found this helpful
Perfect Pair
Harrison from Pocatello, ID on 5/4/2023
This fits perfectly wit the ILX-650 head unit and combined they are both still smaller that my factory radio. I have not even upgraded my speakers yet but the sound quality and clarity has already improved. awesome little package.
Pros:
Cons:
0 of 0 found this helpful
Nice upgrade
Chancy from Joplin, MO on 5/1/2023
2002 Chevrolet Silverado 2500/3500
Really woke up those Alpine S series 6 1/2" door speakers.
Pros: Easy way to add extra power to door speakers.
Cons: If installing in dash you'll need to have switches and gains set where you want them at time of installation or you'll have to pull the dash back apart.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Jacksonville, FL on 4/10/2023
2016 Subaru WRX
Turn off pop, called tech support and they confirmed it was either inside the amp or Alpine head unit. The "on back of head unit" mounting option said it would fit in my car but doesn't. Wiring harness coming out of side hits dash kit/mounting.
Pros:
Cons:
1 of 2 found this helpful
Alpine KTA-450 Power Pack
Kyle from MIDLOTHIAN, VA on 3/15/2023
2018 Toyota Camry
Rough experience with this amp. It was super appealing to purchase because of the small footprint and that it would fit behind my head unit for the install. However, had two failed units in a row. Both had the same quality issues. When the gain was turned up past 30% the unit would completely shut off. To the point that it would not even power back on after a full reset. Meaning unplugged the unit and power source and restarted the head unit. And then it would intermittently turn back on or off over a 45minute driving period. There's not even a power indicator on the unit. Simply disappointed with the setup overall. Ended up installed a full non-compact JL Audio RD400/4 amp and never looked back! Will never purchase an Alpine product again.
Pros: Size of the unit is a big pro. Ease of installation is another.
Cons: However, had two failed units in a row. Both had the same quality issues. When the gain was turned up past 30% the unit would completely shut off. To the point that it would not even power back on after a full reset. Meaning unplugged the unit and power source and restarted the head unit. And then it would intermittently turn back on or off over a 45minute driving period. There's not even a power indicator on the unit. Simply disappointed with the setup overall. Ended up installed
2 of 2 found this helpful
Major Improvement over Factory
Todd from Cincinnati, OH on 3/13/2023
2019 Toyota Tacoma
Problem: muddy, boomy incoherent bass, and scrambled mids and highs in my vehicle, purchesed used, with "factory premium sound". Consider fixing first the amplification. Even with the dull speakers shipped from the factory the overall coherence was greatly improved. The low frequencies (which are often hardest for amps to deliver) became more responsive and in-sync with the rest of the music. The mud was gone. And the higher frequencies came together with much better coherence and "slam". The transients matter, and this amp keeps up. I'm driving this with the preamp outputs of the Alpine iLX-W650 (it just rolls off the tongue, doesn't it?) which is designed to go together with this amplifier, though it can be used with any head unit. Upgrade speakers? definitely. Just don't forget to pay attention to what you feed them. This amp is really good.
Pros:
Cons:
1 of 1 found this helpful
Mansfield
Jason from Mansfield on 3/13/2023
Didn't quite last a year. Started surging on one channel after 9 months was hoping it wasn't the brand new amp. Was unable to pull the car apart to verify that amp was issue until after 12 months warranty period. Alpine would not warranty out acted like no big deal it had even lasted 1.5 years. Buy a different amp that easier to access when it fails. This Alpine amp was only lightly used at that.
Pros:
Cons: Failed to quickly, hard to access for repair/ diagnosis
1 of 1 found this helpful
Great amps
Vincent from Pasadena, CA on 2/21/2023
It is good to have, but if I start over the set up, I don't need this amp because the ILX-W650 is loud enough unless you are crazy with sound, with this amps I use only 7%-8%, 10% maximum
Pros:
Cons:
0 of 0 found this helpful
Cheaply made, avoid
Michael from Crofton, MD on 2/18/2023
2015 Subaru Legacy
Would not buy again. Selling it. Alpine - please up your standards. This price for an amp that goes behind the head unit - ok I should have known it was not going to sound great. Hissing, static, clipping. I changed the ground 3 times, changed the power both of the battery and the 12V lead in the harness, used the RCA inputs with my Alpine W ILX 650 (also a cheaply made and unreliable piece of gear). I hooked up bookshelf speakers to the speaker wire out puts from the amp and same distorted sound (gain was set very low). I bought this unit open box - likely someone returned it because it's low quality or defective. An amp shoved back behind all those wires just isn't a good idea anyways. I don't get these folks who are giving high reviews - perhaps my unit really was just busted. Crutchfield people were nice and helpful - great folks. For the low cost of the HU and this amp I've learned a lot. And learned that you get what you pay for...and a few hundred bucks is not going to get you much in car audio. Also tried ground loop isolators. Craziest thing - when the pan and fade were set center is when the amp distorted loudest on the peaks. As I moved away from center is lessened although still present. Do yourself a favor - save more, spend more, get a better HU and amp. Don't be fooled by this product. It has no longevity, reliability, or quality. Harsh I know. When Alpine does better they'll get praise.
Pros: cheap - but at what cost?
Cons: essentially broken selling it constant noise and distortion never a clear sound despite extensive troubleshooting
0 of 3 found this helpful
Good Powr But Noisy
Chris from Houston, TX on 2/13/2023
Puts out great power but is noisy. Hiss/hum/static, research it. It's not a ground or power wire near audio cable issue. I've been doing car audio for over 30 yrs.
Pros: Great power, small/compact.
Cons: Noisy, little pricy.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Randall from RACELAND, LA on 2/13/2023
1997 Ford F-150
Definitely glad I paired this up with my Alpine ILX-W650. Makes the sound that much crisper and the clarity is amazing. I had replaced my speakers with some Infinity Reference REF-8632CFX that fit my truck, and yeah a huge jump up in sound and enjoyment.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Lindsey from Williamsburg, VA on 2/7/2023
2015 Chevrolet Silverado 1500
WOW WHAT A LOT OF POWER TOO BE SO COMPACTING.. DEFINITELY RECOMMEND TO OTHEES!
Pros:
Cons:
0 of 0 found this helpful
Impressive
Jesse from Sugar Land, TX on 1/30/2023
2022 Toyota Tacoma
I initially replaced the factory speakers in my non-JBL Tacoma with Infinity References and as expected I lost volume and bass due to the factory head unit not having enough power to drive them. Installed the Power Pack and it made a dramatic difference. Clean power for my needs; with this combination I haven't noticed any distortion with my use. I can almost forego a subwoofer with this setup. Only issue is a slight consistent hiss from the speakers which is only noticeable without music and the truck is off. Once the music is on, even with the engine running I have a hard time hearing it unless my ear is right next to the speakers. Gains are set as low as possible. I've tried 5 different grounding locations with no change.
Pros: good power in a convenient and easily installed package
Cons: slight hiss from the speakers
0 of 0 found this helpful
Perfect compliment to the Alpine iLX-w650.
Mark from Spring, TX on 1/30/2023
Perfect compliment to the Alpine iLX-w650. Easy to follow instructions for a DIY. (dip switches may confuse some) I recommend 80hz HPF for Front and Rear settings if you're not sure.
Pros: Powerful for its size.
Cons: I wish Alpine supported their best selling model iLX-w650 w/ KTA-450 in TuneIt.
3 of 3 found this helpful
Alpine KTA-450 Power Pack
Jeffrey Char from Butte, MT on 1/22/2023
2007 Chevrolet Suburban
Easy to install. Does what it's supposed to.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Tallahassee, FL on 1/8/2023
2018 Toyota 4Runner
This amp is well designed physically to attach directly to the back of the Alpine iLX-W650 stereo however I returned this amp due to a loud thump on turnoff. I tried several fixes at the direction of Crutchfield techs but the issue was never solved. I now run my head unit without this amp with no issues. I would not recommend this amp in this configuration.
Pros:
Cons:
1 of 1 found this helpful
great idea. near perfect execution
Phonexay from York, SC on 12/30/2022
2011 Ford F-150 Raptor
Really neat idea and tiny little powerhouse. Makes installing a breeze when stacked with a compatible Alpine HU. My only complaints are that the wires exiting out the side made a bit of a tight squeeze in my application and that you have to pull the HU if you want to tweak the settings.
Pros:
Cons:
0 of 0 found this helpful
Small but mighty!
Russell from Garden City, KS on 12/25/2022
1989 GMC Jimmy
Very powerful and compact. Easy to mount under the dash out of the way. Sounds perfect! And when it's under the dash wiring is short and easy.
Pros: Compact and powerful. Nicely priced.
Cons:
0 of 0 found this helpful
Great Amp!
Donnie from LEESBURG, GA on 12/17/2022
2014 Ford Fusion
Gives a nice kick to the Alpine stereo that I got with it!
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Phillip from Huntsville, AL on 10/30/2022
2022 Chevrolet Spark
Great little amp. I was quite pleased with its versatility. I added it to a 2022 Chevy Spark with only front speakers. The amp is taking speaker level inputs, driving Polk separates in the front and Polks in the rear. Great amplifier.
Pros: Small and compact, especially for a 50 watt x 4.
Cons: None so far.
0 of 0 found this helpful
Great amp, compact and powerful
Tom from Emerald Isle, NC on 9/29/2022
I had purchased another compact amp and because of the lack of input gain control I returned it for this Alpine with the help of customer service. I had already upgraded the dash and door speakers in my 21' Tacoma double cab to the Kicker 48KSS269 up front, and kicker 47KSC6704 in the rear doors. If you're familiar with these trucks the factor radio puts out almost no power especially to the rear channels. I wanted to keep the factory head unit so I added this amplifier to increase the overall sound and fix the shortcomings of the rear door speakers. BOOM! Problems solved, I adjusted the Front gain at 40% and rears at 70% and the sound is corrected at center fade control. More power then I need as volume at 12 is the old 32. Lastly the amp is small and fits under/behind the factory radio with ease.
Pros: Tons of power, adjustable gain control and the ability to use high or low pass inputs
Cons: No power sensing turn on, That's it.
0 of 0 found this helpful
Scion sound system
Jeffrey Victor from Chicago, IL on 9/22/2022
2009 Scion xB
Clean sound, loud, and compact. Connected to Rockford Fosgate R165X3 and Rockford Fosgate R165-S and they match great. Both from Crutchfield.
Pros: Good brand, not cheap but worth it.
Cons: Ya gotta install, but worth it.
0 of 0 found this helpful
KTA-450 power pack
Michael E from Los Osos, CA on 8/15/2022
Like all Alpine components, you just can't go wrong. I have used Alpine products for several years in my rigs and love the sound quality.
Pros: easy install witk the piggy back head units
Cons: The two screws on the iLx407 that are used for holding the Power Pack are barely long enough to do the job. Easy to loose as well.
0 of 0 found this helpful
Good little amp
Tomas from Warrenton, VA on 8/15/2022
Good little amp. Clips when other amps pull too much power.
Pros: small, fits behind the unit tucked away in the dash
Cons: needs more capacitors for clip avoidance
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Jacob from Madison, OH on 7/10/2022
2021 Honda Civic
0 of 0 found this helpful
Nice little amp.
Hakan from Ann Arbor, MI on 7/6/2022
1991 BMW M3
Overall, a great little amp. Easy install in an e30 (1986-1991) BMW 3-series. It fits almost perfectly in the factory amplifier location. The only thing I really didn't like is the setup switches. The instructions on the amp are a little different than in the manual, which is confusing.
Pros: Small, easy install, nice sound.
Cons: Gets hot (no heatsink). Switches for setup are badly labeled.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
James from Portland, OR on 6/30/2022
0 of 0 found this helpful
DO NOT BUY
Michael from NEW MILFORD, NJ on 6/16/2022
Avoid this amp. I've had this amp for 2 years and there's always a problem with it. The volume randomly increases or decreases and becomes really annoying. I've contacted Crutchfield but they aren't much help because they say to just contact Alpine. I did contact Alpine sent the amp in they said there was something wrong so they gave me a new one. Everything worked fine until 7 months later. Same problem and I don't have the warranty anymore. My guess is that this amp gets REALLY hot and since there's no vents on this thing the heat stays inside which definitely screws things up. Spend a few extra dollars and buy something worth your money then this junk.
Pros: Works until in doesnt
Cons: Gets way to hot and eventually damages the amp
2 of 3 found this helpful
Impressive little amp.
Todd from Eureka, CA on 6/15/2022
2013 Ford Edge
This is my third KTA 450 to install in my vehicles. I liked the results so much after installing in my Ford truck and my son's Tahoe that I bought and installed another in my daughter's car. It is so easy to install because of its small size and design - it fits inside the dash. It has plenty of power for my needs. I don't need to rock the hood but am happy with the power and clarity at 2/3 volume that I don't need to go any higher than that usually. I paired it with Alpine S-Series speakers and an Alpine ILX-407 head unit and am more that impressed.
Pros: Sounds great. Nice price point. Easy installation.
Cons: Didn't get it sooner.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Jeremie from Ft Leonard Wd, MO on 5/26/2022
Can't say enough about how well this integrates and puts punch in my system
Pros:
Cons:
0 of 0 found this helpful
Big power in small package
Josh from Port Orchard, WA on 5/22/2022
2014 Chevrolet Silverado 1500
This little guy is awesome. I had it professionally installed and it makes the speakers sound amazing. My only wish was that I was informed I need a separate module to make the chimes and turn signal sounds not be amplified as well.
Pros: Sounds great, good price, small for easy hidden install.
Cons: Adjustments are definitely upside down as mentioned in other reviews.
1 of 1 found this helpful
Great fricken' Amp!!
HOWARD from RIO RANCHO, NM on 5/18/2022
2018 Toyota RAV4
I recently bought the Alpine ILX-w650, and I felt I needed to add some power to my system. Naturally, I decided to add this little amp, since it pairs with the stereo flawlessly, and I figured 50x4 was perfect. The installation was a little difficult, but the wiring support from Crutchfield made this less intimidating. Setting up the amp wasn't too difficult, just make sure you read the directions to determine which direction is up, to set the pins for the power configuration, and LPF. This amp is absolutely perfect for the money, value, and amount of space you will need.
Pros: Size Power LPF/HPF
Cons: None
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Abdon from Oakland, CA on 5/8/2022
2012 Ford Fusion
Works great for me , enough power for the speakers
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Carlos from Bridgeview, IL on 4/12/2022
Nice little amp, using it to push 4 JL audio 6.5! The only problem is alpine printed the diagram upside down and it is confusing. For the past 2 weeks I knew there was a problem and to date I flipped every switch opposite. Now it sounds right. Also using alpine M-1000 wired to 1.3 ohms for three JL 12 W3-3.
Pros: Compact!!
Cons: New guy printed the diagram upside down. Come-on alpine, where is your Quality Control!
8 of 8 found this helpful
Alpine KTA-450 Power Pack
Ronald from Morton, IL on 4/10/2022
Wasted 1/2 day trying to make this amp work. Very good support from Crutchfield. They decided to replace first unit . Billed me for the second unit also , not good with pricing structure. Haven't received second unit yet.
Pros:
Cons:
2 of 2 found this helpful
Alpine KTA-450 Power Pack
Christopher from Spotsylvania, VA on 3/3/2022
2016 Ford F-350
Great little amp, it made a huge difference in my system!
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Iain from Union, ME on 2/27/2022
Gray compact amp. Fit under the fairing in my motorcycle. Delivered very fast.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Captain Cook, HI on 11/7/2021
2017 Jeep Wrangler Unlimited
1 of 1 found this helpful
Excellent with iLX-407
Ronald from Fremont, CA on 10/29/2021
2005 Toyota Camry
I have this PowerStacked onto an Alpine iLX-407 head unit and together they pump out plenty of power for my tastes. These two devices are definitely designed for each other; I have the KTA-450 input gains (fronts and rears) dialed to minimum and the system is noiseless (no detectable hiss) between tracks and silent passages. I chose to use the iLX-407 line-outs and REMO (remote power-on) connections. No strain in the sound even when turned up to my maximum enjoyable volume. The piggy-backed unit fit easily into the dash cavity. User tip: attached the cable harness before attaching the mounting brackets. My only complaint - and this is very minor - is that you can't adjust gains or dip switches after mounting the piggy-backed unit into dash mounting brackets (trim kit). In my case I wanted to play with some settings and that meant some extra deinstall/reinstall steps, but it was a short one-time inconvenience. I used a CK12 wiring kit and it was straightforward to run; I found a nipple in the passenger-side firewall wire grommet and used that to run the positive cable to the battery (passing behind the glove box), and I found a dedicated factory ground point inside the dash cavity so my ground run was only 7 inches. I used wire disconnects instead of crimp connectors between the CK12 cables and the KTA-450 factory wires just to give myself a little flexibility in the future. Overall this small form-factor amp is a great match with the iLX-407.
Pros: Quiet no hiss, plenty of power, small form factor
Cons:
2 of 2 found this helpful
Great Addition
Crutchfield customer from Woodland, CA on 10/9/2021
2005 Toyota 4Runner
It was the needed assistance the stereo needed to push out the right sounds. Everything is so much more clear and precise. In my opinion, it has made my stereo a whole new experience, exactly what it needed. It fits well behind the stereo with no fitting issues, did not even take any extra pressure to install it. Installed with ease.
Pros: Ease of install
Cons: Wish the original HP did not need an amp to produce such great sound
0 of 0 found this helpful
Big Bang for the Buck
Crutchfield customer from Williamston, MI on 10/9/2021
2015 Subaru Forester
Purchased to add some punch to my Alpine iLX-W650 and Fosgate speakers. Easy to install and really added depth and bass to my system. A no brainer if you love your music and on a budget. Beware mounting brackets for Subaru Foresters do not allow the power pack to be mounted to the rear of the W650.
Pros: Adds depth and bass to good speakers.
Cons: Forester mounting bracket does not allow power pack to mount on rear of W650
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Largo, FL on 10/6/2021
Exactly what I needed/wanted, right power to make my Morel Maximo 6 flex.
Pros:
Cons:
1 of 2 found this helpful
The 450 is excellent with sound
Crutchfield customer from Dsrt Hot Spgs, CA on 9/23/2021
2007 Jeep Grand Cherokee
The Alpine KTA 450 is Very Strong little amplify great with sound. It is also very easy to install anyone that does not want to be running so many wire and having to deal with the hassle of running wire I'm trying to hide them this is a great option.
Pros: Quality of sound is great play strong and very easy to install
Cons: Didn't like that it did not have a remote connection to the stereo like any other amplifier.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Dorr, MI on 9/23/2021
2008 Jeep Wrangler
2 of 2 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Deltona, FL on 9/23/2021
2005 Ford F-250 Super Duty
Pretty slick how mounts and saves space
Pros:
Cons: the heat it puts out is a little bit of a worry
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Reno, NV on 9/21/2021
2017 Ram Promaster City
Easy to install and connects to factory speaker wires
Pros: It fits behind the matching alpine stereo
Cons: The dip switches are upside down and it's hard to figure out how to set them up
2 of 2 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Chicago, IL on 9/16/2021
Added that extra power to all the speakers
Pros: Hooks up to the back of the radio out of sight
Cons: None
0 of 0 found this helpful
Mighty Little Amp
Crutchfield customer from Herrick, SD on 8/23/2021
2018 Subaru WRX
I bought this to install in my 2018 WRX without replacing the head unit. This amp is amazing for its size!
Pros: Size Power
Cons: None
0 of 0 found this helpful
Great Amp if You Can Which Way is Up!
Christopher from Greer, SC on 8/8/2021
The amp is compact and powerful. It really brings out the full range of my Hertz DSK 170.3s with punchy bass, balanced midrange, and crystal clear highs. The only complaint is the ambiguous up/down caused by the dip switches being upside down from the instructions printed on the end. Ignore the "up" printed on the upside down dip switches, and follow the indicators printed on the amp body itself and you'll be on your way to awesome sound!
Pros: Compact, efficient, powerful, clean sound!
Cons: Would it have killed Alpine to put that dip switch in right side up or blank out the print except for the switch numbers? Or Mays add "Hey, we know the switch is upside down, just go by the indicators printed on the end of the amp?"
5 of 5 found this helpful
An essential add on for any iLX-650 owner.
Crutchfield customer from La Porte, IN on 7/24/2021
2006 Chevrolet Silverado 1500
Compact, crisp clean sound and perfect companion product for my iLX-W650 head unit. I driving 4 JBLs in door on my Silverado and two tweeters and the unit is perfect for reasonable level, full spectrum and noticeably clear sound.
Pros: Size, cost, clairity, ease of install
Cons: None for what it is.
1 of 1 found this helpful
Should of installed it sooner
SERGIO from HOUSTON, TX on 7/7/2021
2012 Chevrolet Impala
Finally installed the amp a few days ago....This mofo kicks!!! I have the Alpine 650 and the difference this amp made to my system is immaculate. The sound in my car is so clean, no distortion, and the bass is on point.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Eric from Melbourne, FL on 7/3/2021
2010 Honda Accord
Nice compact amp. Clear and crisp and works great with JL audio speakers. Very happy customer!
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Ben from Newnan, GA on 6/17/2021
2019 Hyundai Tucson
0 of 0 found this helpful
Sound improvement, poorly laid out
Crutchfield customer from Olympia, WA on 6/15/2021
2004 Toyota Tacoma
Good investment- sound is good, easily connects to existing alpine head. It took me about two hours to install plus a bit extra to get setup. There are a few design issues- dip switches and wiring. Fortunately the folks at Crutchfield can help you figure out the missing instructions and help you get it working.
Pros: Easily fits in back of alpine 650 unit Sounds goodish
Cons: Hard to figure out wiring Dip Switches seem to be poorly placed
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Harris, MN on 6/14/2021
2016 Kia Sorento
Sounds clean, but I was hoping for a lil more.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Pittsburgh, pa on 6/11/2021
Decent amp except for the fact that it regularly overheats and won't power on on hot days. The other two amps work flawlessly (not alpine) but this one for whatever reason cannot handle the heat of being in the dash on hot days. Zero issues 9 months out of the year but summer.....forget it. Sorry I bought it.
Pros: Small and powerful
Cons: Not built to handle the heat of being in a dash like advertised.
6 of 6 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Plano, TX on 5/17/2021
Works great with 2004 Honda Pilot. Even thought there is no way to hookup current Subwoffer Amp to new radio using this KTA-450 amp and disconnecting existing Honda works great. Y'all need to put this in your how to hookup existing Honda Subwoffer
Pros: Works Great Great work around with Honda Subwoffer
Cons: None so far
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Madison, MS on 5/17/2021
Lot of clean power in such a small package. Put in TJ
Pros:
Cons:
0 of 0 found this helpful
"Your amp is... in the dash?"
Crutchfield customer from Cynthiana, IN on 5/16/2021
2003 Honda CRV EX
Alpine really nailed it with this add-on amplifier. It specifically fits their shallow mount head unit and installs together as a single unit , amazingly, with room leftover! Wiring is not cramped on the amp, on the head unit, or in the dash. The RMS output is nearly triple of most head units making it a perfect match for entry level replacement speakers.
Pros:
Cons:
0 of 0 found this helpful
Alpine
Crutchfield customer from Decatur, GA on 5/16/2021
1991 Chevrolet Corvette
0 of 0 found this helpful
Great sound! Design? Meh.
Kevin from ALLEN, TX on 5/7/2021
2007 Ford F-150
I don't know how this won design awards. It's a good amp. The sound output is impressive. The dip switch settings for "up/down" are really bad.... and I wish I had not read all the other reviews complaining about this, which threw me off. Alpine needs to print an arrow on the amp with an "Up" and an arrow near the dip switches to remove the confusion. Of course I had it complete backwards. The installation kit Crutchfield sells with this covers up the gains and dip switches. I had to trip that to keep access. The wiring is a little cramped. I expected some kind of special cable harness assembly for this amp to the iLX-W650 head unit it is designed to be paired with to make connections MUCH simpler.... but nothing was provided. THAT would have been impressive. I did not enable any high pass filter, because the Alpine head unit handles that. The worst part about this amp, is that the gains had to be set very low, or there was significant hissing with no audio source, that becomes very noticeable at any level much higher than minimum gain. That said, once you get it set right and dialed in, it is a VERY impressive amp for the size. Night and day difference over the premium factory head unit. Not even close.
Pros:
Cons:
4 of 4 found this helpful
Small but mighty
Crutchfield customer from Seattle, WA on 4/29/2021
2008 Honda CRV
Love it. This little thing not only fits well in the dash, but it sounds good with much sound. It has dsp which smooths out the peaks to provide better quality audio. It is great as the power pack, but standalone too. My alpine speakers are loud and still sound great with this. It's easy to install with RCA connections and a Crutchfield amp wiring kit(best value/quality).
Pros: It sounds good and loud. Versatile installation.
Cons: Dip switches are flip flopped.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Olivehurst, CA on 4/21/2021
This amp was easy to wire and made my stock speakers clear up. I'm still planning on upgrading the stock ones. Well worth the buy
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Jacksonville, FL on 4/20/2021
This amp works very well. Definitely save time by having all the connections right there without the need of having to run cables (except for the battery cable). Set up can be a little confusing with the dip switches. Alpine printed a guide for setting the dip switches, then mounted the switches upside down. Leaves you to figure out which way is TRULY up/down. Performs very well, and sounds great. My only concern so far is heat dissipation. Not a lot of air moving around behind the dash to aid with cooling. I may add a fan for my own piece of mind. Other than that I am happy with this install.
Pros: Compact, connection points close
Cons: Setup switches upside down, it gets warm.
0 of 0 found this helpful
Great for Jeeps
Crutchfield customer from Imperial, MO on 4/14/2021
2018 Jeep Wrangler Unlimited (JK)
3 of 3 found this helpful
Great compact amp for great sound.
Crutchfield customer from Cordova, TN on 4/11/2021
2008 Ford F-150
Very easy install. Plenty of power for my 50 RMS door speakers. It fit perfectly behind my single den Pioneer . I was so happy with it I ended up getting the Alpine 650 head unit that matches it. Together they blew me away. Great sound and clean install and the dash appeal is on point. Definitely worth every penny.
Pros: Compact Easy install Low heat production Clean sound at all levels Quality
Cons: None
0 of 0 found this helpful
Not as easy as lead to believe...not Crutchfield's fault.
Paul from Naples, FL on 4/9/2021
2020 Ford F-150 Lariat
This review has to do with using the KTA-450 with the ILX-W650. Do not be fooled, it is not as easy they say. You will need to wire 3 different wire harness together. Part of the factory wiring goes to the Amp and part goes to the ILX. Its a VERY tight fit and the wires have to be routed just so...If you have a car with lots of space behind the radio, you should be good. My car was VERY tight and at some points I wished I had not gone this route. I ran the ILX separately from the KTA-450 for some time and the KTA-450 made a big improvement on the sound with my upgraded speakers. Is it a good package where you can keep the amp with the radio, Yes. Is it an easy plug and play, NO, does it sound good, yes, would I do it again, probably not.
Pros: great sound
Cons: VERY TIGHT FIT. Can be hard to wire if its your first rodeo
2 of 2 found this helpful
good little unit but needs work
Rafael from Seattle, WA on 4/9/2021
2013 Subaru XV Crosstrek
I just finished installing this today (4/9/21) overall easy to wire, a lot of cable management will help slide it into your dash easier. would recommend sanding down a good ground and cleaning it well to help the "hissing" noise. Put this on my ILX-650 just wished it was more easier to install to that head unit. Sounds amazing and gives good power to the speakers BUT still get some hissing noise from the gain knobs, would recommend going less than half. Also the instructions on the switches are horrible, took a while to figure out but called Crutchfield and their help made things easier. Crutchfield always with the great customer support thanks for the suggestions on the grounding.
Pros: great power, small, easy.
Cons: confusing instructions, hissing issues.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Naugatuck, CT on 4/9/2021
2015 Subaru Legacy
Great little power amp. Love that it fits in the dash. Sounds awesome.
Pros:
Cons:
0 of 1 found this helpful
Great Power Amp
Crutchfield customer from Tracy, CA on 3/23/2021
Great improvement to the sound compared to no amplifier. There is a hissing noise at low volume, so need to keep gain low to keep the noise under control. This one is designed for Alpine ILX650. In fact Alpine ILX650 shouldn't be sold alone.
Pros: Compact, Perfect match for Alpine ILX650
Cons: Noise at low volume
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Vista, CA on 3/22/2021
2004 Ford F-150
This lil amp packs a big punch.. since I upgraded my deck & realized I can add this lil guy behind the stereo while tapping into the factory speaker wires makes this an awesome addition to power your door speakers. Big step up from no amp running my door speakers.. I am really happy with this addition to the sound system!
Pros:
Cons:
0 of 1 found this helpful
The PERFECT amp...
Crutchfield customer from Hickory Creek, TX on 3/16/2021
I've now installed the Alpine KTA-450 into three different vehicles, and could not be happier with this little amp. At 45-50w per channel, it will easily provide ample power to the speakers with no distortion (in fact, the gains on all 3 I've installed are adjusted quite low- otherwise you can only use the bottom end of the volume control). Also, the amp provides resistance in each channel (so if you have a vehicle that normally needs resistors installed to ensure the factory head unit doesn't turn off the speaker channel, this amp will work without them). The band pass features allow you to customize the front vs. rear channels for the best sound, and overall this little amp just gets the job done while using very little space.
Pros: Plenty of power, small size, easy to install, great sound
Cons: None
0 of 0 found this helpful
Keeps up and sounds great
Cory from Saint Petersburg on 1/25/2021
2005 Toyota Corolla
So overall performance is 5 stars, but based off the whole thing I have to go with 4. The sound is fantastic and the crossovers are nice to have. Wiring to the matching ilx-w650 is easy enough and you can tell the Amp is made to match the HU in size. This 4 channel keeps up with the 1000 watt RMS 12 in the trunk Now let's get to the tricky bits. The manual that came with the ilx-w650 is a nice little booklet...this thing that is made to match it comes with a 3 language, ye' olde driving map. The multi fold, almost impossible to get back in gracefully map. A small thing in the end really. But them switches though...the designer on the labeling should be demoted. It's labeled with the word "ON" on the bottom with an arrow above it pointing up, as if to say "flip UP for ON". Oh no, dear Crutchfield customer, that makes you a fool. DOWN IS ON AND UP IS OFF (making that statement is why I'm really writing this whole thing, to hopefully help someone else out there). Since this unit pairs with the ilx-w650 it would be nice if instead of the badly labeled switches it just interfaced with the equalizer and crossover settings in the HU so they made one functional Megazord, instead of 2 units with the same options on each. A nice option though if not using the ilx-w650, then you get handy dandy crosover options you might not have had before. Get a 12 gauge amp kit too! Plenty of power.
Pros: Great dynamic sound Easy install Crossover options
Cons: Switch labeling (ON is "on" and the arrow points to "off") Manual is tricky MATCHES ilx-w650, but does not INTERFACE with it
4 of 5 found this helpful
Alpine KTA-450 Power Pack
Joseph Edward from Cheshire, CT on 11/25/2020
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Chesapeake, VA on 11/25/2020
0 of 0 found this helpful
Satisfied
Crutchfield customer from Waynesville, NC on 11/22/2020
2008 GMC Sierra
Easy installation, simple but great value
Pros: Economical, easy installation
Cons:
0 of 0 found this helpful
Good Product!!!!
Crutchfield customer from Albuquerque, NM on 11/15/2020
1994 Chevrolet C Series
Put this in my 94 k2500 with 4 new speakers and HU. Worked perfectly and sounds great. Slim product that will fit u der the dash easily.
Pros: Small footprint, RCA inputs.
Cons: None.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Scott from CUMMING, GA on 11/14/2020
Really make the difference, my speakers are powered as they should be now and it sounds incredible
Pros: Delivers much needed power for good after market speakers
Cons:
1 of 1 found this helpful
Tiny Truck, Tiny Amp
Mitchell from Northumberland, PA on 11/13/2020
I needed an amp for a vehicle with very limited interior space. This amp definitely fits the bill.The output is satisfying and clear.
Pros: It fits and has a low power draw.
Cons: None so far.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Marble, MN on 11/7/2020
Nice compact unit easy adjustments before install finish.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Cambridge, MD on 11/4/2020
0 of 0 found this helpful
Alpine Quality!
Crutchfield customer from Quitman, TX on 10/28/2020
Installing my new Alpine ILX-650 in a classic Chevy, and the KTA-450 power pack can be easily positioned to provide a 2020-level sound experience.
Pros:
Cons:
1 of 1 found this helpful
No brainer
Crutchfield customer from Saint Joseph, MI on 10/25/2020
Simple little brick that sits behind your head unit. Wouldn't consider anything else. It works great, it's cheap, it's easy and it's so small it's hidden.
Pros:
Cons:
0 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Harvest, AL on 10/15/2020
2008 Honda Pilot
Awesome amp! Works well with the Alpine ILX-W650 receiver!!!
Pros:
Cons:
0 of 1 found this helpful
Alpine
Guest from El Paso, TX on 10/14/2020
Just bought this receiver and right off the back it looks tiny and seems like it's not going to be very good,But looks are vey deceiving this little radio is a beast once I installed it in my 2011 Hyundai Elantra I was amazed it's has so much power clarity and options. My music had never sounded so good . I give this a 5 star rating .Buy it you won't be disappointed.
Pros:
Cons:
1 of 1 found this helpful
Most convenient amp ever
Crutchfield customer from Wilsonville, OR on 10/7/2020
I was skeptical of this amp given its size. It performs better than I could have imagined. It's not going to shake everything loose but will deliver clean sound. Having it paired with the Apline iLX-W650 makes it even better since it is hidden and out of the way by being installed in the dash.
Pros: Compact and hidden. Great clean sound.
Cons: The layout for setting it to 2 or 4 channel and setting the crossovers is a little confusing since it seems to be upside down.
2 of 2 found this helpful
Alpine KTA-450 Lots of power in a small space.
Crutchfield customer from Newburyport, MA on 10/6/2020
A great addition to the Alpine iLX-W650 head unit! It mounts on the back the the low profile receiver for a powerful and compact package! A nice solution for cars with limited depth in the dash or any car that has room for a double DIN receiver.
Pros: Lots of power. Easy to wire. A well engineered product
Cons: Instructions are lie an old road map. A big cumbersome piece so paper. Print is small.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Lewiston, NY on 9/26/2020
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Quinlan, TX on 9/24/2020
2011 Chevrolet Impala
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Boston, MA on 9/24/2020
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Naples, FL on 9/21/2020
This amp is amazing. Paired it with 4 kicker 6 1/2's and it brought them alive. Love that it mounts on the back of my alpine receiver.
Pros:
Cons:
0 of 0 found this helpful
compact amp with a nice punch
Crutchfield customer from Stafford, TX on 9/9/2020
2010 Dodge Ram 1500
My Alpine iLX-W650 already made a huge difference over my factory stereo with clear sound and more power. But, for the 1st time ever, I wanted to add a small amp. I really like how the KTA-450 bolts on to the back of the iLX-W650, saving so much space. And, it delivers plenty of clear sound at a higher volume. Can't wait for my next road trip.
Pros: compact, competitive price
Cons:
3 of 3 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Greenfield, IN on 9/2/2020
0 of 0 found this helpful
Little amp, great punch.
04Dawg from NEW ALBANY, MS on 8/30/2020
2018 Toyota Tacoma
Added this amp in my 2018 Toyota Tacoma. Replaced factory head unit with a Pioneer DMH1500NEX, and all speakers with Kicker tweeters, Kicker 43DSC69304 6x9's, & Kicker 43DSC6704 6 3/4". Also used a Pioneer CD-MC20 Auto EQ mic to calibrate. The amp was super easy to install & fit just right inside the dashboard. No special power wiring needed since my truck has 20 amp radio fuse, so power & ground tied right in with the power & ground for the head unit. Setting the front & rear gains were a breeze. HUGE upgrade from factory system, especially after the calibration. Amp added the extra power to drive all the speakers wonderfully and I'm beyond pleased & impressed with the results. If you want an amp to maximize a modest upgrade to your existing system, this Alpine easily does the job. Great little amp!
Pros: Easy install, fits in dash.
Cons:
1 of 1 found this helpful
Compact with just the right amount of power
Crutchfield customer from Weaverville, NC on 8/27/2020
2003 Subaru Baja
This unit is compact and easy to fine tune. wiring harness makes connection easy. You will not need RCA cables.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Aliquippa, PA on 8/25/2020
1999 Jeep Wrangler
I got a whole new system so I feel it is better with an amp as my previous set ups didn't have one.( A sub is also a must.) I like the size. It fits in the dash behind the radio in my 99 Wrangler. Gets extremely hot. Not sure if thats good or bad.
Pros: Small
Cons: Gets HOT
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from La Crosse, WI on 8/22/2020
Makes factory speaker sound great. Never heard new stereo without but it rocks. Mounts so nice to alpine head unit
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Miami, FL on 8/20/2020
Very small and sounds great, I bought is as a system with the iLX-W650 where in becomes a singe unit and goes into the dash! great idea!! A must!!
Pros:
Cons:
0 of 0 found this helpful
Pleased
Crutchfield customer from Alta Loma, CA on 8/2/2020
Powers the speakers really well. When I first installed the sound was flat which was really disappointing. Realized I had the cross over dip switches in the wrong position. Once fixed it is a ton of power and complete sound.
Pros:
Cons:
2 of 2 found this helpful
Great add for OEM systems
JG from Littleton, CO on 7/24/2020
2019 Subaru WRX STI
Wanted to give some punch to my stock 2019 Subaru STI OEM head unit. Upgraded the door speakers and tweeters with the available Subaru Accessory Kicker upgrades. Ran the OEM speaker line outputs to an LC7i line output converter with an ACR-1 bass level control knob, and sent signal from the LC7i to the Alpine KTA-450 amp and a JBL Bass Pro Nano underseat sub under the driver seat. Mounted the amp and the LC7i under the passenger seat, and the ACR-1 into a blank spot on the dash. I am very pleased with the system. The amp punches well above its RMS weight for the doors. The LC7i provides very clean signals to the amp and restores OEM bass roll off for the sub. The sub also puches well above its weight, and installing it under the driver seat makes the sub feel and sound very effective and minimizes lost storage space. Would do it all over again.
Pros: Size, 100% peak power reserve.
Cons: Price per watt of output, no RCA plugs.
2 of 3 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Clearwater, FL on 7/21/2020
2013 Jeep Wrangler
1 of 7 found this helpful
Good amp for door speakers
Crutchfield customer from Jonesborough, TN on 7/21/2020
2008 Ford F-250 Super Duty
This is a great little amp to get the boost to your door speakers that most aftermarket speakers need. I couldn't believe how loud this thing made my speakers. I have this paired with Polk DB572 speakers, and the gain is barely up. I could have cranked it higher but didn't need to because the speakers were so loud. Fit perfectly with the Alpine ILX-W650 in the dash of my 08 F250. The way this amp is designed it's extremely easy to install especially when paired with the ILX-W650
Pros: Size, power, ease of install
Cons: None
2 of 2 found this helpful
Alpine KTA -450
Crutchfield customer from Worcester, MA on 7/20/2020
The alpine Kta is perfect for what I wanted. I installed it under the passenger seat between the heating and cooling vents. I kept my factory unit and install four upgraded door speakers and a JBL bass pro hub spare tire fitted. Performance for this small amp unit is incredible. I can here vocals much clearer. The mids and highs are adequate for the noisy cabin On certain textured roads in my wrx. I am very happy with this little amp. Install was easy, just time consuming if your routing wires and Keeping the install as clean and neat as possible. I ended up getting a couple Metra harnesses as to not splice or cut into the factory harness. Customer tech support is helpful and available when you need them. Amp came with instructions. Great product!
Pros:
Cons:
1 of 1 found this helpful
I woulnt buy the Alpine radio without the powerpack!
Crutchfield customer from Charleston, SC on 7/14/2020
2006 Volkswagen Jetta
Excellent!
Pros: This powerpack is excellent and makes even dated factory speakers sing. I plan to upgrade my speakers at some point and really hear the punch!
Cons: I wish Alpine would design the powerpack to have a settings menu on the radio. I mention this only because if I wanted to adjust the levels of the amp, I need to remove the radio, remove the Soche radio install bracket and reinstall everything. This is an issue on a 14-year-old car with brittle plastics.
2 of 4 found this helpful
Small package, heavy punch
Crutchfield customer from Sanford, NC on 7/13/2020
1999 Jeep Cherokee
Installed this with an alpine ilx-650 in a 93 mustang coupe. This little amp packs an amazing punch and worked wonders on the 6x9 and 5 1/4's. Will be buying another one for our jeep.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Ramiro from Waipahu, HI on 7/13/2020
2019 Nissan Frontier SV
Purchased alpine head unit amp combo. Sounds good.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Uniontown, OH on 7/8/2020
0 of 0 found this helpful
Deceptively Powerful
Crutchfield customer from Blountville, TN on 7/6/2020
2005 Toyota Tacoma
This miniature amp is deceptively powerful. It possesses more than enough power to drive your component speakers with clarity. Paired with the iLX-W650 it creates the perfect combination of easy installation and awesome sound. My only complaint is that the dip switches are a bit tedious when setting the frequency parameters. I'm in awe of this tiny giant.
Pros: Small Powerful Great for component speakers.
Cons: Dip switches are a bit confusing. If paired with iLX-W650, you must remove head unit from dash to change amp settings.
1 of 1 found this helpful
Awesome addition to the ILX-W650
Crutchfield customer from Sandy, UT on 6/28/2020
2015 Nissan Altima
Awesome little amp paired with the ILX-W650! I've had the head unit for about a year. Just added the amp and what a difference! I have a 2015 Altima with Kicker Coaxials and now the speakers have come to life. Install was easy and there is plenty of room for all the wires behind the units. I didn't run a power cable to the battery as the Altima uses a 20 amp fuse for the stereo so I tapped that. All is working perfectly. Love this thing!
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Carlisle, PA on 6/22/2020
2006 Ford Mustang
Great design and upgrade. Taking a star from alpine bc it seems to me they made this work with the ilx-w650 and left that unit underpowered, great marketing.
Pros:
Cons:
0 of 0 found this helpful
Good buy
Crutchfield customer from Kings Park, NY on 6/22/2020
2014 Ram 1500
Was skeptical at first due to its size. But was blown away by its performance.
Pros:
Cons:
1 of 1 found this helpful
Pump up the Volume
Crutchfield customer from Richmond, VA on 6/10/2020
2005 Chevrolet Silverado 2500/3500
Love this amp addition makes for clean crisp sound with my new speakers "Infinity"
Pros: Fits my 2005 - 2500 HD without modifications
Cons: Lot of Wire to put back in the dash.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Haymarket, VA on 6/9/2020
2004 Dodge Ram 3500
Has amazing power. Speakers sound Crystal clear now at any volume.
Pros: Mounts to back of alpine radio. Very compact
Cons: None
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Solvang, CA on 6/1/2020
1990 Toyota Land Cruiser
This amp is working super well with my new stereo. It is providing all the power I want.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Zachery from VIRGINIA BEACH, VA on 5/23/2020
2011 Jeep Grand Cherokee
Was super easy to install on the back of my alpine 650 head unit. Sounds way better too.
Pros:
Cons:
0 of 1 found this helpful
Clean
Crutchfield customer from Traverse City, MI on 5/20/2020
2010 Dodge Nitro
Perfect fit and sound is clean with no distortion
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from San Antonio, TX on 5/17/2020
2007 Ford F-150
Glad I got this the power it puts out it awesome So awesome I need to buy new speakers for my truck now lol I'm going with some 6x8 kickers with some crossovers can't wait for them to arrive so I can put my radio higher than halfway
Pros: Alot of power in a small amp Easy to connect
Cons: none yet
1 of 1 found this helpful
Fantastic sound clarity
Brian from Woodland Hills, CA on 5/16/2020
2018 Honda Clarity
Sounds really good. Very small unit with very little (if any) added noise or loss of clarity. I am feeding it well out of a Pioneer DEQ-S1000a DSP by RCA input, and this unit definitely handles itself well. More about sound quality than loudness, but if that's what you look for this is a really great, easy to hide unit.
Pros: Sound clarity, RCA input as default, easy to install and understand all setting options.
Cons: Does get very warm after extended use.
2 of 2 found this helpful
Perfect add-on for any system!
BRIAN from VIRGINIA BEACH, VA on 5/14/2020
2011 Mazda 3
This is the critical piece I was missing from my system. Working with a Pioneer AVH-4800, aftermarket speakers x4 and a self-powered 10" in the trunk of a 2011 Mazda 3. It sounded good but I was dissatisfied with how underpowered my door speakers were; they were only getting 14W RMS from the head unit. This amp added the much-needed kick to those speakers (gain settings at roughly half!) and now the system is loud, clear, and I finally have some mid-bass from the previously power-starved JBL's in the doors. As far as amp functionality I opted to leave the HPF switches alone as I'm able to control them thru the head unit as I see fit - recommend the same for anyone that can do so. The only issue I had with installation was the lack of depth behind the head unit and limited options for alternative storage - finally cut a hole in the side plating to feed the amp into the glove box - the wiring harness barely allowed it but I'm going to jumper in some 12" RCA cables to give myself some slack in there. Otherwise the install was a cinch! Couldn't be happier with the sound and now I can finally roll with the windows down without losing my music!
Pros: Compact and powerful, adds significant punch to any 4-channel system!
Cons: None so far. Just make sure you have a spot to tuck it!
1 of 1 found this helpful
Buy it. Buy it now.
Crutchfield customer from Columbus, OH on 5/11/2020
2003 Ford Expedition
Fantastic little amp. Using it bridged for front stage components and the result is amazing. Haven't tested but I should be seeing 90 watts RMS per channel and it sounds like it. The small form factor made installation a breeze. Since it's so small it was able to install in the dash with my single DIN head unit with room to spare.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from South Weymouth, MA on 5/8/2020
2001 GMC Sierra 1500
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Shane from Norman, OK on 4/30/2020
2011 Mazda 2
This amp puts out some amazing power for such a small unit. Incredible and I love the sound.
Pros:
Cons:
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Oklahoma City, OK on 4/29/2020
2012 Ford F-150 XLT
Love this! It gave my speakers all the power they needed.
Pros:
Cons:
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Zillah, WA on 4/28/2020
2004 Subaru Impreza WRX
1 of 1 found this helpful
Less Is More
Crutchfield customer from Rockford, MI on 4/13/2020
2004 MINI Cooper
Easy to install and a lot of punch out of small form factor! Comes with crossover to split frequencies between front and back.
Pros: Price, small, and great punch!
Cons:
2 of 2 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Hurricane, WV on 4/12/2020
Nice compact amp, fit right inside the dash of my TJ, produces huge sound for the money, this amp is a must have with the alpine ilx-w650, very nice upgrade from factory sound
Pros:
Cons:
0 of 0 found this helpful
Great sound! Excellent addition for mids and highs!
Jesse from Middletown, CT on 4/9/2020
1996 Honda Accord EX
I love this amp! I got it so that my 4 speakers running from my head unit would be closer to fully powered so that all of my mids and highs would be amped. The sound is so much better now sounds clean, clear, and powerful! Great addition to my other amped speakers! I'm upgrading my system to the jl audio C1 line and am almost done all I need now is four 6x9s and it will be complete! It already sounds amazing! Can't wait until it's finished! This amp brought my total power up to 1000 watts rms, 500 to my subs and 500 to the mids and highs! There's nothing like the feeling of rocking out to an awesome sounding powerful stereo while on your daily commute! Love it! Keep on rocking everyone and enjoy!
Pros: Great extra power and clarity for mids and highs! Fits behind head unit for most cars
Cons: Mounting behind HU w/ brackets can be tricky depends on how much space you have, unless paired with alpine unit, mounting with universal brackets takes some customizing if you can fit it with the brackets, or if you have to fit it without gotta be creative in how you mount it.
1 of 1 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Rosemead, CA on 4/8/2020
2016 Toyota RAV4
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Citrus Heights, CA on 3/31/2020
2015 Kia Sorento
Amazing sound in a small package. So easy to install.
Pros: Easy install Great sound
Cons: None
1 of 1 found this helpful
That's what she said!!
Crutchfield customer from Brownsville, TX on 3/27/2020
Size doesn't matter! Unit was compatible with my receiver and it was able to fit it all into my Tacoma's dash. Little package, big punch POW!!
Pros:
Cons:
1 of 1 found this helpful
Self install of stereo equipment in Kia Optima
Crutchfield customer from Clarksville, TN on 3/23/2020
This fit perfectly on the back of my Alpine ILX650 and in the dash with no issue at all. Cabling was not an issue either.
Pros: Fit perfectly with my ILX650 Alpine in My Kia Optima
Cons: Makes it hard to get to the gain and adjustments it you need to without any other equipment. But it still sounds great once setup!!
1 of 1 found this helpful
Great Little amp -
Crutchfield customer from Columbus, MT on 3/19/2020
2007 Chevrolet C5500
Lot of punch in a very small package. Easy enough to install and puts out more than enough for a 4 channel system with upgraded 6.5 speakers
Pros: Small, fits in dash, easy to wire
Cons: wiring harness was simple and easy enough to wire and probably the way it is for installations when used without the ilx-650 head unit. Would be nice if there was a harness already put together in applications where head unit is used so there isn't so much bulk of wiring to try and stuff in the dash behind the media HU and amp
0 of 0 found this helpful
Nice amp.
Crutchfield customer from Englewood, CO on 3/16/2020
2009 Ford Ranger
Nice amp and mounting to back of deck was great.
Pros: Mounting
Cons: Wiring harness should have a 90 degree plug for mounting to deck. With straight plug there is too much coming out the side of the assembly and it makes it hard to slide into dash. Alpine needs to come up with a deck to amp cable like the used to. It would eliminate a lot of bulky wiring between the units.
1 of 2 found this helpful
Small with power quality.
Crutchfield customer from San Juan, PR on 3/11/2020
2011 Honda Fit Sport
I'm surprised, this small amplifier let me double+ the power without compromising space in my car.
Pros:
Cons:
2 of 2 found this helpful
Good Amplifier for compact installation
Crutchfield customer from Cedarburg, WI on 3/9/2020
2008 Chevrolet Silverado
Straightforward connection with very clear sound. Plenty of power for the small size. I wanted to make sure that I had some punch in my Silverado since I replaced the factory speakers years ago. This amp with the ILX-W650 is plenty for the truck. I do not have a sub, so do not have the vehicle shaking sounds, but the sound is very clear even at high volumes. I did adjust the gain settings and had to keep them around 5 to prevent clipping of the amplifier, but have plenty of volume for me.
Pros: Sound is very clear even at high volume Fits well into existing radio space bolted to rear of the Alpine ILX-W650
Cons: None that I can find
1 of 1 found this helpful
Nice compact amplifier.
Crutchfield customer from Murfreesboro, TN on 3/3/2020
2002 Lexus GS300
Pretty decent amplifier. Fits to the head unit exactly as it should. Very compact. As I stated in the head unit review, either the amp or the head unit is causing a loud POP to come though the speakers when I start the car.
Pros: It's tiny
Cons: Not for this amplifier specifically, but a 5-channel version to power my factory subwoofer would have been even better.
0 of 0 found this helpful
Alpine KTA-450 Power Pack
Ryan from Hampshire, IL on 2/27/2020
Love the power and ease of installation, no need to try and find a spot and run wires. It connects right to the head unit!!
Pros:
Cons:
0 of 0 found this helpful
2018 Toyota 4Runner in the PNW
K from PORTLAND, OR on 2/21/2020
2018 Toyota 4Runner
Bought this with the Alpine ILX-650 combo, Crux adapter, and all the misc components I needed to install it. I've installed a ton of radios over the years and have never had any issue (my connections are soldered and sealed using military grade adhesive heat shrink tubing). From day-one this radio sounded thin and lifeless and after weeks trying to diagnose the issue I gave up and exchanged it. I had never bought a radio from Crutchfield before this one. I usually buy wherever I can find the cheapest price. Crutchfield was running a promotion on this radio, the price was right considering it came with the scoche adapter, etc. so I pulled the trigger. Given the trouble I had with this particular unit, I will never buy a car radio from anyone else ever again in the future. I can't say enough amazing things about Crutchfield and their service teams both on the customer & tech side of things. Everyone there was amazing. In addition to talking with Crutchfield's tech support team I ended up talking with Alpine's consumer tech support while trying to diagnose this problem, as I had previously had great experiences w/ Alpine components. One occasion talking with Alpine's tech support they brushed me off saying "it probably was a Toyota issue because our equipment never sounds bad." Fast forward the Kenwood Excelon radio I got from Crutchfield to replace this one is amazing and works flawlessly...sorry Alpine your radio must have been de
Pros:
Cons:
4 of 17 found this helpful
Alpine KTA-450 Power Pack
Crutchfield customer from Pittsburgh, PA on 2/21/2020
Love the amp. Give the extra punch I was looking for paird with the ilx 650 and jbl gto component speakers it sounds amazing
Pros:
Cons:
0 of 0 found this helpful