The heavy-hitting Infinity Reference 7451a 4-channel amp is more than ready to take on your mobile audio needs — whether it's powering top-end component speakers, or supplying the juice to get two subs rocking.

If you're powering components, the 7451a offers four channels of 111 watts RMS power, ready to make the highs sing and the lows pound. Variable high- and low-pass filters (32-320 Hz, 12 dB/octave) allow you to trim the range of frequencies being amplified so you can maximize speaker performance.

If you're running a pair of subs, the 7451a pumps out 278 watts by two channels in bridged mode. That's more than enough wattage to drive all but the most power-hungry subs. The MOSFET power supply ensures your subs won't ever be starved for power, and there's also a bass boost (0-12 dB at 50 Hz) for when you need that extra kick.

The 7451a will integrate smoothly into your system, thanks to preamp- and speaker-level inputs, as well as full-range preamp outputs.

Product Highlights:

  • 4-channel car amplifier
  • 111 watts RMS x 4 at 4 ohms (139 watts x 4 at 2 ohms)
  • 278 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
  • front and rear variable high-/low-pass filters (32-320 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 50 Hz)
  • MOSFET power supplies
  • CEA-2006 compliant
  • Tri-way capable (Tri-Way crossover required)
  • preamp- and speaker-level inputs
  • preamp outputs
  • 8-gauge power and ground leads with a 60A fuse recommended — wiring and hardware not included with amplifier
  • fuse rating: 30A x 2
  • 16-3/8"W x 2-11/16"H x 12-1/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Infinity Reference 7541a Reviews

Average Customer Review:

32 reviews
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Solid amp

Written By Stewy, Milwaukee,Wi on Tuesday, January 31, 2012

Not a bad amp for its price. Its a big solid heavy amp. If your a sound quality competitor you might want something different such as JL Audio. To the human ear you cant really tell any distortion though. Im running this amp with 2 pairs of JL audio C5 61/2inch components hooked up to it in a 4ohm load. Not bad for infinity its worth buying for a 4 channel amp. It says its 111x4 but if it was bench tested i bet its closer to 130-140 watts per channel! If you use a good head unit,good rca jacks and good overall wiring in your car this is definetly worth the cash.

Pros: plenty of power,4channels, solid durable amp,price is right.

Cons: wouldnt use crossovers on amp i would use a regular 4-8 channel crossover. Big and heavy, but is that really bad,,,unless you have little room? Not the cleanest of amps if your a sound quality competitor but humans cant tell too much

Very Good Amp

Written By Reggie, Tampa on Sunday, October 05, 2008

This is a very good amp....there are no problems...people have said that they just wanted it louder and louder...this amp goes very loud, however Infinity's plan to to have a more clear sounding amp rather than a "loud" one....this works great on compents....amp just get a little warm at times...

Over all a great amp

Great amp

Written By steve, Pittsburgh, PS on Friday, April 06, 2007

i've had this amp for over a year now, and i've had zero problems with it. i have it powering polk sr6500's in the front and infinity ref 5x7's in the rear. Now people say they want it to be louder...make sure you check the sensitivity of the speaker. i have the gain turned up to about 12 or 1 o clock for my front channels and i have it turned to about 9 o clock for my rears. the sensitivity of the polks are 90db and the infinity's are 94 db. If you have speakers like alpine with a lower sensitivity of 87 or so, you will have to turn the gain up too much to a point of distortion and ruin your speakers or amps. i would recommend powering speakers with a higher sensitivity with this amplifier, it'll make your ears bleed.

Great amp

Written By Dave, Indiana on Wednesday, March 28, 2007

We are using this amp in two 35-ft limo coaches. The system is set up the same in both. There is no comparison to any of the systems we have used before it. It drives two Infinity Kappa 652.7i's in series on each channel (4-ohm load). The subwoofer frequencies are filtered in the Panasonic CQ-C8803U head unit and passed to an Infinity Reference 611a. The 611a drives two Infinity Kappa Perfect 12vq component subs. Two Tsunami 1.2-farad caps are installed to support the amps. As long as the levels and filters are all set properly, this system sounds great. We have had it up to around 75% with no audible clipping. We would have to wear hearing protection to get it any higher as it becomes very uncomfortable to listen to at these levels. This is certainly not a competition grade system, but we have more than enough power for our application. The sound is clear and crisp throughout the volume range that we have tested.

Infinity Reference 7541a

Written By Phil, Lakewood, CO on Sunday, March 11, 2007

Crutchfield Customer Review (What's this?)

I purchased this amp after researching several brands of other 4-channel amps with similar features. I had this amp wired im my '01 Accord Coupe to a set of 6 1/2" Infinity Reference speakers (6012si), and a 10" 4-Ohm Kicker L5 DVC (another set of 6012si's are wired to my Kenwood deck)when the amp suddenly went into protection mode when playing at less than half volume. I had it bench tested at the place where it was installed and they confirmed it was toast. I was a little disillusioned as I had only had it a month. I was able to send it back and get a new one thanks to the good honest folks at Crutchfield. The sound quality is awesome and pushes the speakers with ease. I would recommmend anyone with a system setup similar to mine to get a H.O. alternator though (preferably a 200-amp one) as it is quite taxing on the car's charging/electrical system.

Nothing Negative

Written By herbertj1, Kingston, PA on Wednesday, February 14, 2007

I have this amp running a pair of Polk DB6500 components and a pair of Polk DB650 coax speakers. I have the amp at about 40% on the 650's and 60% on the 6500's and it creates so much volume it actually hurts. I see where the clipping can be an issue. If I try to turn the amp up beyond 50% gain on the 650's, it clips with heavy bass. I imagine this has something to do with the 60 watt rating on the speakers, so I will not hold that against the amp. For the price you'll struggle to find this kind of clean power anywhere else. I'm sure there are better options out there if you want to drop some serious cash, but this is a great value for the money. The only negative I can find is this amp is power hungry. When I have the stereo cranked way up, it will actually dim the lights on hard bass hits.


Written By Armando, El Paso TX on Monday, February 12, 2007

I have connected this amplifier with 2 pairs of audio DB6500 polk and single I work by a month this amplifier if you read the other commentaries has problems when they are used with components and the truth I do not recommend it. Today I am without audio so that they estan repairing the amplifier

This amp is just OK

Written By Jim, Southwick, MA on Saturday, January 20, 2007

Crutchfield Customer Review (What's this?)

This amp is just ok. It sounds good when it is wired straight. But when you bridge it, it sounds bad. You have to bridge it by using one channel on the front and one channal on the rear. If you are using two subs this amp is not a good choice. The bass boost on it only runs the rear speakers. So if you bridge this amp you will only have boost on the the speaker that you have in the rear channel. I wired both of my subs straight through the rear channels and it sounds good but now I'm not using the front channels at all. If I new this ahead of time I would have bought a two channel amp.

Infinity Reference 7541a

Written By Berto, SLC UT on Thursday, January 18, 2007

I bought this amp to run some Infinity Kappa Perfect 6.1s. after I got everything installed the amp clips out when I turn up the volume. It sounded great when I was pushing my Kappa 6.5s alone on the rear channel but when I got my 6.1s added to the front channel it doesn't seem to like them. I am now informed that I will have to buy a higher quality amp to run those speakers. Wish I would've known that before! Overall a decent amp for a decent price just not what I expected.


Written By Walt, Indiana on Friday, January 12, 2007

i love this amp. i bought it about 5months ago for my 95 grand prix. before i was looking for an lanzar vibe amp, but i got turned onto this one. for now i got just two channels being used cuz i allready blew my sissy 5-1/4 pionner 130watt door speakers, planning on putting some 6x8 in the doors, but the two speakers im using now is two 6x9 pionner 230watt speakers, it sounds crip and like a live concernt, as long as you take out the bass to them. you can hear them with the windows up 2 blocks away. im so glad i got this amp (and the infinity 611a with 2-12in mtx subs i wish everyone could hear it, or maybe they can :D

Performs Well

Written By DarkJello, New York on Sunday, January 07, 2007

Crutchfield Customer Review (What's this?)

So far it has provided good crisp power to the four speakers in my Maxima [Polk db5250 up front, and Polk's 6x9's in the rear] For the price it is a very high quality amp, if you need four channels you can't go wrong here.

I have it running from JVC's KD-HDR1

Hit or Miss

Written By Vance, Greensboro, NC on Thursday, November 30, 2006

I bought this amp based on the high ratings it received on Crutchfield, and for a time it performed well. However, as one reviewer also stated, I kept wanting to hear it louder. This worked for certain kinds of music but not for others (i.e. deep bass).

The amp started to clip and then the rear channel went out. Maybe it was the speakers? They were Infinity 682.7cf's rated at 100W RMS. I hooked up my Polk DB5250s to the rear channel but the problem continued. Still working with Infinity on a solution but I'm not hopeful.

In the end if you don't listen to your music more than ~ 50% of max then this amp will most likely perform well. However, if your looking to drown out the system 4 cars behind you at the light, go with something better quailty.

This is the one!

Written By tt, Birmingham, AL on Tuesday, October 17, 2006

Crutchfield Customer Review (What's this?)

I screwed around trying other amps, this is the one. True to it's spec's.
C5 Corvette Vert. Top down, 80 mph, you can more than hear the tunes. Top up, your ears will hurt! :)

Love it,

Thanks Crutchfield!

Simply Amazing

Written By Jonny, Michigan on Tuesday, October 10, 2006

I thought about buying a profile or kenwood amp before i bought this amp but everything in my car was infintiy so i spent the extra $$ and got this amp. WORTH EVERY SINGLE PENNY. Running aftermarket speakers off a head unit and an amp is like night and day.I have this pushing a pair of 3 way 6x9 references in the rear deck and 2 way 5.25 references in the front door. The mids bang and the highs scream! All the filters on this amp are great, not to mention that it is a beast of a four channel. At this price and quality there is nothing i can say but amazing. I have it mounted on the back of my rear seats next to my 611a(the amps look awesome next to each other). Paired with two 10.1 perfects in the trunk running off the 611a, this is the cleanest sounding system i have ever hear and it is loouuuuud. Only downside is that ive wasted a lot of gas money cause all i want to do is drive around with the music all the way up!


Written By Anonymous, NY on Sunday, October 08, 2006

I bought this amp from Crutchfield looking for a good deal on a powerful amp. This amp is great for the untrained ear. It seemed to power my Pioneers (TSA-1681R) very well. After a while I just wanted it louder and louder so I just turned up the gain more and more (bad idea). For some reason, these speakers never blew. Either they are that good (not likely) or the amp can't make the power advertised. Secondly, the signal to noise ratio isn't listed and for good reason. An 80dB snr is terrible for a class A/B amp. Furthermore, the power ratings are at 1% THD. That's also not good for a class A/B amp. Have'nt used it on any subs so I can't attest to how well it would power them. In conclusion if you want questionable power with the sacrifice of clean, warm sound... get this amp.


Written By stew, Houston, Tx on Tuesday, August 01, 2006

Man this amp is the bomb, white glove clean and clear reproduction of tunes. This sucker just wont let up even at high volumes. This is what i got after my alpine f450 completely died on me. Im running my tired alpine 9831 head unit. I have Infinity Kappa 6 1/2 components and the 3 way 6 x 9s running in my 2001 prelude. This amp and speakers just makes your eyes raise up(stunned) and ears bleed. I ran some friends out of the car. This is your besy buy overall

A Quality Amp

Written By Anonymous, CT on Saturday, July 22, 2006

Crutchfield Customer Review (What's this?)

First off I want to clear up Infinity is Not Harmon/Kardon they are seprate along with JBL but both are part of Harmon/Kardon International. Anyway this is one Awesome and Clean sounding amp. Infinity did a great job putting a balance of sound, power, and affordability in this product. I have this powering 2 Polk/MOMO 6x9's and 2 Alpine Type-R componants (the older model) and the music sounds supurb with the exception of me disliking the Type-Rs. I'm very impressed and happy with my purchase. Unfortunetly before I got this amp, I bought the new MTX TC4004 series amp and both I got were defected so it was time for something that works. This amp however, fulfilled all my needs and then some. This amp also has a nice clean modern look to it, I think even more so in person than the pictures. If you're looking for a great amp to power all you're speakers this is the way to go. I'd say a great choice if you're looking to power subs but I bought them to power speakers so I couldn't honestly tell you which is better. Either way I'm sure its a great choice. You won't be dissapointed! Last but not least you can not go wrong with Crutchfield with the best products and services look no further than here!


Written By Rjai, PATERSON, NEW JERSEY on Tuesday, April 18, 2006

The sound from this amp is off da chain it has more power than I expected. ClEAN AS CAN BEEEEEEE, The amp has all the power I need for 1 sub and two 6x9's all of which are infinity of course. ALL I CAN SAY IS "AWESOME".

Infinity Reference 7541a

Written By finfan1966, Rochester New York on Sunday, March 19, 2006

I have to say this is the best amp I have ever had running my main speakers. I have this amp running my Infinity 693.5i kappas in the back and my Infinity perfect components in the front. The sounds is unbelievable and the amp takes the power like a champ. Some of the reviews I have read say that this amp does not work well with Infinity perfect components but I have not had any problem. If you want loud, crisp, clear sound then this amp is for you. This amp kills the Alpine MRV-F345 and it is cheaper.

Phenominal Amp!!

Written By Chris, San Antonio, tx on Monday, March 13, 2006

This amp is absolutley amazing. I have had mtx and alpine amps and they dont even amount to the quality of this amp. Power is no problem for it, not to mention it is incredibly clear. I tell everyone i know to buy this amp and if your an audiophile this amp is for you.

Powerful and Clean, Killer Amps!!

Written By RemMax, Indiana on Monday, January 23, 2006

In my Ford Ranger Extended Cab I have Installed a Kenwwod 7028 CD Tuner with 3 Pre-Outs (Front,Rear&Sub) with a Sirius Tuner and a Infinity 7541 4 channel amp paired with a Infinity 611a Mono Sub Amp pushing a pair of Infinity Component 5010cs speaker's mounted in Q-Form Kick Panels and 6810cs component speaker's mounted under the rear factory grills these are complemented by a pair of 12" Kicker Comps in a sealed box behind the seat. These amps are I beleive the cleanest amp's I have ever owned Well worth the money spent on them! They are also VERY VERY LOUD!! Many people think my hearing has gone bad due to time on the Gun Range, Little do they know I wear hearing protection there!! :>
Since I bought this equipment in December 2005 the only problem I have had is that I have SMOKED my second Kicked Comp Sub in Jan 2006! However when all my speakers are playing they are extremely clean and VERY VERY LOUD! I would consider these amps a good investment to anyone who likes Loud, Clean Stereo Music in there vehicle! This system literaly rivals the sound quality of my home system and that is hard to due in a Motor Vehicle! Now if I can just find a set of Subs to handle the power of the 611a I will have it made! :> Till then God Bless warranty's!

Infinity Reference 7541a

Written By johny, Westchester, NY on Thursday, December 08, 2005

I've only had this installed for about a week now, but it doesn't take long to see this is a great amp. I have it hooked up to 2 sets of Polk Audio DB5250 component sets and it sounds great. Extremely clear and very, very loud. I went from a stock audio system to this and the difference is night and day. I was worried this wouldn't make my interior speakers loud enough to match the dual L7 woofers in the trunk, but it does the job very well. I can't wait to get my next car to pair this up with some even better speakers and be impressed again. Buy this amp and you won't be disappointed.

Infinity Reference 7541a

Written By Dave, ND on Friday, November 18, 2005

I emailed Infinity and asked about the amp and its compatibility with component speakers (i have the perfect 5.1's and kappa 4x6 plates) And the rep said that they would sound great with that amp, he also told me that they have never experienced problems with component speakers and this amp. He said that no one from infinity would say that and it should be more than enough power to get those running and sounding great.

Infinity Reference 7541a

Written By Mikee, DC area on Wednesday, October 19, 2005

Crutchfield Customer Review (What's this?)

I put this in a '01 QC Ram. I have it driving Infinity Reference 6010cs 6-1/2" 2-way Components in front and Infinity Reference 6012i 6-1/2" 2-way Speakers in the rear. Sounds awesome. I have the line output running to an Infinity 611a for the sub....for now. ;) I couldn't be happier.

excellent amplifier

Written By xxilimited, klamath falls, OR on Wednesday, September 07, 2005

I have this amp hooked up in four channel mode to six-inch component pioneer speakers at two ohms and i just can't believe how loud this amplifier gets. I even hooked this amp up to some kenwood 10 inch subs to test out the bridged power output and bass production of this amp, and it produces just as well as it did with full range speakers. for the money this amp kicks out some serious sound. I would buy another one if i did not already have another subwoofer amplifier.

Harmon Kardon's down fall

Written By josh, Anchorage Ak, Las Vegas Nv. on Tuesday, September 06, 2005

Crutchfield Customer Review (What's this?)

I bought this amp to push my 2 pairs of 6.1 kappa perfects. at crutchfield and infinitys recommendations. later after i installed the system 40 some odd days after i bought the system i couldn't figure for the life of me why the clip protection was coming on at very low levels. i called infinity and spoke with several techs. to find that infinity never intended the amp to push component sets. seems the ohms of the component systems crossover send the amp all out of wack. infinity sent me new capacitors for the crossovers which was suppose to fix the problem. yeah right. i was able to get hardly any extra sound from them. i called them back and they said that if i wanted to hear the 6.1s at their peak performance i would have to replace the amp with a higher performance model. i called crutchfield and the idea did not go over very well. so now i have a system that is not nearly what it should be. you would think that infinity would put a label on it or something that says do not use 6.1 perfects with this amp or something. any way $900 later i am not very satisfied. i have seen this amp on other speakers and performs very well. i have also seen the 6.1s on other amps and they out perform mine 10 fold. great amp just don't use with component set speakers.

Infinity Reference 7541a

Written By Daniel, Suffolk, VA on Monday, August 15, 2005

I have installed this amp in my S-15 Jimmy. If you install it on the flap covering the gap inbetween the rear fold down seat and the cargo area don't worry that flap will still hold its weight and probably another amp if you want. I haven't really pushed the amp, mostly because the subwoofer its hooked up to can't handle the power. I only have this amp hooked up to one sub right now but thats only till I get another mono amp to power it so I can hook this amp to my infinity speakers. If anyone has any suggestions for a place to buy a fitted 12" sub box for the rear right side cargo area, or if anyone could tell me why Infinity audio online says the 6-1/2 Kappa's 3ways will fit but Crutchfield says they won't. As for this amp, buy it Infinity is the best. It has more than enough power for what it is supposed to do.

Infinity Reference 7541a

Written By hotbot, california on Wednesday, June 15, 2005

Crutchfield Customer Review (What's this?)

wow i am not easily impressed but i sure have been this time i am running mbguart reference series components on this amp and they sound great

get the most for your money

Written By Mike, stow ohio on Tuesday, June 14, 2005

i have this amp pushing my kappa 652.7i and 682.7cf. its brilliant. clean clear power. do yourself a favor, if your looking to get the most for your money, this is the amp for you


Written By RYAN, OKLAHOMA CITY, OK on Friday, May 27, 2005


Excellent power and clarity

Written By Erick, Richmond,VA on Friday, May 13, 2005

Crutchfield Customer Review (What's this?)

I installed this amplifier with a lighting audio 1.0 capacitor and 2 JBL 6 by 9'S and a infinity 1230 sub in my sea ray 220 bowrider. The sound is very powerful and clean, The amp has all the power I need and the sub sounds awesome. Great price and great value! 5 stars!
Erick Oliver

Infinity Reference 7541a

Written By Zack, Milledgeville, GA on Tuesday, March 22, 2005

I have this amp bridged pushing two Infinity Perfect 10.1 subs and they sound great on all types of music, you definately get your money's worth with all infinity products

Hands-on research

What's in the box?

Download owner's manual

  • 4-Channel amplifier with two 30A fuse installed
  • 2 Spare 30A fuses
  • 4 Self-tapping screws (length=1")
  • Two 2-Channel speaker level input harness (with a 4-pin Molex plug on one end and bare wire on the other end)
  • Instructions
  • Amplifier Quick-Start Guide
  • Warranty/Product Registration card
  • Infinity window decal

Product Research

Inputs, Outputs, and Controls
Wiring Recommendation


PWM MOSFET Power Supply: The Infinity Reference 7541a is equipped with a high-output PWM MOSFET power supply, which ensures optimum power delivery into numerous impedances with low distortion.

CEA-2006 Compliance: The specifications given by Infinity for the Reference Series 7541a amplifier comply with the new CEA-2006 Amplifier Power Standard from the CEA (Consumer Electronics Association). All manufacturers who comply with the standard can display the CEA-2006 logo on their product.

Protection Circuitry: The amp features 4-way protection, and will shut itself down in the following cases:

  • DC Output: DC voltage is detected on the amplifier output
  • Temperature: Amplifier is overheated
  • Over/Under Voltage: Voltage at the +12V (Battery) terminal is less than 8.5V or more than 16V
  • Short Circuit: Short circuit in speaker or speaker wire

Status LEDs: Three LEDs on top of the amplifier provide the status of the amplifier. The "Clip" LED indicates the amplifier is being overdriven, and the speakers may be in danger. The "Power" LED indicates the amplifier is on. The "Protection" LED flashes or glows to indicate the amplifier has entered the protection mode because of a malfunction.

Channel Configuration: The 7541a can be configured as a 4-channel amp for driving two pairs of full-range speakers, a 3-channel amp (bridging one set of channels) for driving one pair of full-range speakers and one subwoofer, or as a 2-channels (bridging both sets of channels) for driving two subwoofers.

Bass Boost: The amp is equipped with a variable 0-12dB bass boost at 50Hz. The bass boost affects only the rear channels.

Selectable High/Low Pass Filter: The 7541a has variable 12dB per octave, 32-320Hz crossovers for the front and rear channels. You can independently select high-pass or low-pass operation, or flat (for full-range operation) for each crossover.

Mono/Stereo Switch: A 2-way switch allows you to select stereo operation for full-range speakers or mono operation for subwoofers. There are switches for the front and rear channels for independent selection.

Inputs, Outputs, and Controls

Left Side of Amp:

  • Preamp Output: 1 pair of gold-plated RCA jacks (amp provides a non-filtered, summed stereo signal for daisy-chaining additional amplifiers)
  • Front Channels:
    • Preamp Input (Front): 1 pair of gold-plated RCA jacks for the front channels
    • High-Level Input (Front): 4-pin Molex jack for connecting the supplied 2-channel speaker level input harness to the head unit's front speaker outputs
    • Input Level: Rotary control to match the level of the front channels' input signal
    • Mono/Stereo Switch: 2-way switch to select mono or stereo operation for the front channels
    • Mode: 3-way switch to select the front channels' crossover mode: Flat (no filter), LP (low-pass), or HP (high-pass)
    • Freq: Rotary control to set the cutoff frequency of the front channels built-in crossover
  • Rear Channels:
    • Bass Boost: Rotary control to set the level of the 50Hz bass boost (rear channels only)
    • Mono/Stereo Switch: 2-way switch to select mono or stereo operation for the rear channels
    • Mode: 3-way switch to select the rear channels' crossover mode: Flat (no filter), LP (low-pass), or HP (high-pass)
    • Freq: Rotary control to set the cutoff frequency of the rear channels built-in crossover
    • High-Level Input (Rear): 4-pin Molex jack for connecting the supplied 2-channel speaker level input harness to the head unit's rear speaker outputs
    • Input Level: Rotary control to match the level of the rear channels' input signal
    • Preamp Input (Rear): 1 pair of gold-plated RCA jacks for the rear channels

Right Side of Amp:

  • Speaker Output: 8 Set screw terminals for connecting speaker wires; handles up to 8 gauge (16 gauge minimum recommended)
  • Fuse: Slot for two 30A fuses (installed)
  • Power:
    • +12V: Set screw terminal for power wire from battery; handles up to 4 gauge wire (8 gauge minimum recommended)
    • Remote: Set screw terminal for remote turn-on lead; handles up to 8 gauge wire (18 gauge minimum recommended)
    • Ground: Set screw terminal for ground; handles up to 4 gauge wire (8 gauge minimum recommended)

Wiring Recommendation

Fuse Rating: The 7541a has two 30-amp fuses for a total fuse rating of 60 amps. If you use an 8-gauge amp wiring kit, you should choose a kit which includes a 60-amp fuse to accommodate the amp's fuse rating. If the kit includes a 40-amp fuse, you should upgrade the fuse to a 60-amp fuse (211AGU60 or 142P60F4i). All of the 4-gauge amp wiring kits carried by Crutchfield include a 60-amp or 80-amp fuse.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.