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Sound Ordnance M-4050

4-channel car amplifier — 50 watts RMS x 4

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Our take on the Sound Ordnance™ M-4050

by Buck Pomerantz
Sound Ordnance

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.

Win the battle for great sound in your ride. Sound Ordnance amplifiers feature tough construction, rugged looks, and a 3-year warranty, so you can enjoy the full power of your music for the long haul. Even better, you can add Sound Ordnance to your arsenal at a surprisingly affordable price.

The Sound Ordnance M-4050 4-channel amplifier deploys 50 watts RMS to each channel, giving your music plenty of firepower. You can also bridge the amp to 2-channel mode to mobilize a pair of subs with 180 watts RMS each, or send 180 watts to a sub while the front channels run your full-range speakers. An adjustable high-pass filter makes sure your full-range speakers operate within their optimum range and give you the best tone possible. If you're driving a sub, the low-pass filter and selectable bass boost allow you to control your bass barrage at will.

The M-4050 amplifier uses sophisticated power supply and output technologies to ensure clean amplification from the inputs all the way to your speakers. Special circuits protect the amp from overheating and short circuits, and a turn-on delay virtually eliminates that annoying thump when you turn your system on.

See more info on this item

Highlights:

  • 4-channel car amplifier
  • 50 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
  • 180 watts RMS x 2 bridged at 4 ohms (4-ohm stable bridged)
  • variable high-pass filter (120-3,000 Hz, 12 dB/octave)
  • variable low-pass filter (50-250 Hz, 12 dB/octave)
  • selectable bass boost (0, 6, and 12 dB at 45 Hz)
  • PWM (pulse width modulation) power supply with MOSFET output
  • preamp inputs and outputs
  • fuse rating: 20A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 14-1/8"W x 2-1/8"H x 9-13/16"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels)
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50 x 4
Peak Power Output (Watts x Channels)
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94 x 4
Power at 2 Ohms (Watts x Channels)
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90 x 4
Bridged Power (Watts x Channels)
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180 x 2
Minimum Impedance Bridged
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4
Minimum Impedance Unbridged
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2
Best Frequency Response
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12-25k Hz
THD at Rated RMS Power
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1%
Signal to Noise Ratio
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96 dB
Input Voltage
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14.4v
Features
Amplifier Class
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AB
Low-Pass Crossover Frequency
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50-250 Hz
Low-Pass Slope (dB/octave)
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12 dB/oct
High-Pass Crossover Frequency
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80-2k Hz
High-Pass Slope (dB/octave)
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12 dB/oct
Bass Boost
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0, 6, 12 dB
Bass Boost Frequency
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45 Hz
Fan Cooled
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No
Fuse Rating
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40
Speaker Level Inputs
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No
Preamp Outputs
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1 pair
Width (inches)
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14-1/8
Height (inches)
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2-1/8
Depth (inches)
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9-13/16
Parts Warranty
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3 Years
Labor Warranty
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3 Years
Product Research
What's in the box?

Download owner's manual

  • 4-Channel amplifier with two 20A ATC blade fuses inserted
  • Spare 20A ATC blade fuse
  • 4 Self-tapping screws (5/8" length)
  • 4 Split lock washers
  • 4 Flat washers
  • Owner's Manual

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 open the box, verify contents, 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.

Features
Connections

Features

Power Ratings: The Sound Ordnance M-4050 is a 4-channel Class AB amplifier with an RMS power rating of 50 watts per channel into 4 ohms, and 90 watts per channel into 2 ohms. The amp can also be bridged into a 4-ohm load for a power rating of 180 watts (x 2). Power ratings are measured with an input power of 14.4 volts.

Crossovers: The M-4050 is equipped with both high-pass and low-pass crossovers. The front channels (channels 1 and 2) and the rear channels (channels 3 and 4) have separate crossovers. You can set the low-pass cutoff frequency between 50Hz and 250Hz, and the high-pass cutoff frequency between 80Hz and 2 kHz. Separate switches let you select low-pass, high-pass, or full range operation for the rear channels, and high-pass or full range for the front channels. The crossovers have a 12dB per octave slope.

Bass Boost: The amplifier has a bass boost switch, labeled Super Bass, to give small subwoofers more volume in the low frequencies. You can select the amount of boost with the 3-way switch: 0dB, 6dB, or 12dB. The Super Bass feature is available for the rear channels only.

LED Indicators: The M-4050 features two LED indicators: a green LED that illuminates when the amp is powered on, and a red LED that illuminates when the amplifier is in protect mode due to overheating or a short circuit in the speaker wire.

Connections

Removable End Caps: The end caps on the M-4050 are removable with a 3mm Allen wrench (not supplied) to make it easier to attach the power and speaker wires.

Power Connections: The power and ground connections are set screw terminals that will accommodate up to 8-gauge wire. (An 8-gauge amplifier wiring kit is recommended.) The remote turn-on terminal is a set screw terminal that will also accept up to 8-gauge wire. A Phillips-head screwdriver (not supplied) is required to tighten/loosen the terminals.

Speaker Connections: The speaker connections are set screw terminals that will accommodate up to 8-gauge wire. A Phillips-head screwdriver (not supplied) is required to tighten/loosen the terminals.

RCA Inputs and Outputs: The amplifier features two pairs of stereo RCA inputs for connecting your head unit--one pair for the front channels and one pair for the rear channels. If your head unit only has one pair of preamp outputs, you can feed all four amplifier channels by connecting optional Y-adapters. (You will lose front-to-back fader capability if you connect the amplifier using Y-adapters.) There is also a pair of stereo RCA outputs for feeding the preamp signal to another amplifier, if needed.

Fuses: The M-4050 features two 20-amp ATC blade fuses.

 

Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Sound Ordnance Amplifiers

Video: Sound Ordnance Amplifiers

by Video Guest
 
Video: Sound Ordnance Amplifiers

Make your music sound lively and vital with a Sound Ordnance amplifier. Watch this Crutchfield video for a quick overview of what these amplifiers have to offer.

 
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Sound Ordnance™ M-4050 Reviews

Average Customer Review:

63 people say:

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Filter by rating:
5 out of 5

Great Amp

Written By Mikep, Grand Rapids, MI on Tuesday, August 26, 2014
Crutchfield Customer Review (What's this?)
 
This amp is high quality and delivers big time. very impressed.
Pros:
Nice sound, and price.
Cons:
A little big but pretty slim.
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5 out of 5

Sound Ordnance™ M-4050

Written By John R, Olustee Oklahoma on Thursday, August 21, 2014
Crutchfield Customer Review (What's this?)
 
Great product and can't beat price!
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5 out of 5

Sound Ordnance™ M-4050

Written By flem, N.Y. on Saturday, August 02, 2014
Crutchfield Customer Review (What's this?)
 
great amp with good power. Easy to adjust and stays very cool. Love the black and chrome looks Nice!
Pros:
Stays cool and easy to adjust
Cons:
mounting screw holes and screws are too small
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4 out of 5

was just what i wanted

Written By steve, rockland, maine on Friday, July 25, 2014
Crutchfield Customer Review (What's this?)
 
Works fine
Pros:
Great sound
Cons:
Didnt like the emblem stuck on top of it
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5 out of 5

Amazing 4 channel amp

Written By SlickVic, Yonkers NY on Wednesday, July 16, 2014
Crutchfield Customer Review (What's this?)
 
What an amazing amp... I didn't think I was going to get the performance I am getting from this sound ordnance 4 channel amp along with sound ordnance component 6 1/2 speakers and 6x9 speakers. I'm happy.
Pros:
Great deal for great performance
Cons:
None
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5 out of 5

Excellent

Written By DVanC, Oak Ridge, TN on Saturday, July 12, 2014
Crutchfield Customer Review (What's this?)
 
Great amp for an entry to mid level system. I actually have one of these in each of my vehicles. They are clean, clear and loud. Cant beat the price, its solidly build, and it looks good.
Pros:
Price - much higher quality product than you would get from a competitively priced amp. Quality - Build quality is nice, sound is very clean, and the built in crossovers work very well.
Cons:
None. Seriously.
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5 out of 5

Amazing for the money.

Written By Dominic, Dallas, TX on Sunday, July 06, 2014
Crutchfield Customer Review (What's this?)
 
I was a little apprehensive about this amp as it is priced well below it's competition, but I was pleasantly surprised. The product arrived in a package strong enough to withstand the roughest of UPS workers, which was nice. The amp itself is very sleek and feels heavy and durable, indicative of a quality build.

Installation was very easy, as I was actually replacing another amp that had died. But it came with everything needed to replace the previous one. I went ahead and replaced the power and ground wires as the ones that came with the amp as the battery is in the rear of the car and it was an easy swap.

I have had the amp installed for about 3 weeks now and am quite pleased with it.
Pros:
Cheap. Effective. Durable.
Cons:
Maybe back in 2000 someone would have made fun of you for having an off brand amp, but no one really cares anymore. No downside to this amp as far as I can see.
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5 out of 5

M-4050

Written By R.E.Little, Talking Rock, Ga on Tuesday, July 01, 2014
Crutchfield Customer Review (What's this?)
 
Improved the clarity and range of the aftermarket Pioneer speakers in my 2000 Ranger regular cab pickup. Finding a way to mount it behind the seat required some thought, but I did manage to do it.
Pros:
The wiring was easy to do with the free wiring kit, although I did need to purchase extra RCA cable for 4 channel operation
Cons:
Size could be a problem for some types of installations.
1 out of 1 people found this helpful
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3 out of 5

ok for the money

Written By walt md., murrryland on Friday, June 27, 2014
Crutchfield Customer Review (What's this?)
 
Ok job for the money. Entry level amp
Pros:
Good
Cons:
Need more power
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5 out of 5

Modest amp for a modest price

Written By Matthew, Salt Lake City on Wednesday, June 18, 2014
Crutchfield Customer Review (What's this?)
 
This amp does exactly what it is intended to do. Good entry level 4 channel amp for an entry level price.
Pros:
plenty of power to run the fronts
Cons:
the wire hold downs are somewhat difficult to get to because of the angle and are very short causing them too easily fall out after loosening just a few turns.
1 out of 1 people found this helpful
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5 out of 5

Great, simple, and powerful.

Written By Matt, Utah on Thursday, May 29, 2014
Crutchfield Customer Review (What's this?)
 
I bought this amp to power a pair of Pioneer TS-A1674R and a pair of Pioneer TS-D6802R speakers (with a Pioneer DEH-6300UB stereo). The sound is great and there is a lot more clarity from the speakers. I had it installed by a professional at a car audio shop so I can say with some certainty that it was installed correctly. Great amp for the price and came with install kit.
Pros:
-LOUD -Clarity -No heat problems yet, however, we are going into summer now. -PRICE PRICE PRICE -Came with amp install kit so saved more money.
Cons:
-Size wouldn't allow me to mount underneath car seat. -Slight bass distortion from my D6802R's but I need to turn it down anyways. -Slight whine noise, not sure what source is. Could be from amp or grounding or other source. Can't hear it when turned up anyways so unless you don't want to listen to music, you will be fine.
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5 out of 5

Da Secret's Out....!!!

Written By One Braddah, Koloa, Hi. 96756 on Sunday, May 25, 2014
Crutchfield Customer Review (What's this?)
 
OMG, I just love this AMP.!! (M-4050) I never post things, but I just had to share a few words to help others click the buy button.... It's just like Fast Food, cheap$ & does the job w/ out draining your wallet.. Best of all it is design By CRUTCHFIELD & they also gave a free 8-gauge wiring kit for a special.....duh, it was a no brainer..!! Don't for get..!! Your sounds will only be as good as your Stereo Deck, so $pend the money more on that end..... Running a Alpine Deck w/ 61/2 & 6x9's type S & 1 Polk Audio 10 All off this $100 AMP...! Crazy!!
1 out of 1 people found this helpful
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5 out of 5

just a great amp

Written By jeff, Wyoming, MI on Friday, May 16, 2014
Crutchfield Customer Review (What's this?)
 
This amp is like listen too angle from above Bill Evans first CD played the sound it just Something special to.the sound it just sweet
Pros:
Ten star
Cons:
None
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5 out of 5

Sound Ordnance M-4050

Written By KyleH, Rockingham,NC on Wednesday, May 07, 2014
Crutchfield Customer Review (What's this?)
 
Great Amp for the money. Performed exactly as needed for my application. Easy to tune and enough power to push the four MTX speakers that were used for stock replacements.
Pros:
Economical, performed very well for my application, and mounted under the seat with ease in a 2007 Honda Accord.
Cons:
None at this time.
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4 out of 5

Sound Ordnance™ M-4050

Written By RMB, Saint Louis, MO on Sunday, May 04, 2014
Crutchfield Customer Review (What's this?)
 
I needed an amp to for my new speakers this amp has performed wonderfully . Wished i had bought a higher end speaker
Pros:
Great amp for the price
Cons:
None
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4 out of 5

Well Worth It!

Written By M, Hamilton, MA on Tuesday, April 22, 2014
Crutchfield Customer Review (What's this?)
 
I needed an amp to replace an A/d/s amp in my 1985 535i; this amp has performed wondefully with my 30 year old ads speakers! The sounds is just as good if not better than my old amp. Easy install. Big plus was the free wiring kit that came with it.
Pros:
Nice sound!
Cons:
None at this time.
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5 out of 5

Great amp!

Written By clean music, Peoria on Saturday, April 19, 2014
Crutchfield Customer Review (What's this?)
 
This amp is all I expected and more! I have infinity reference components 5 1/4" in the front and 5 1/4" 2 way sound stream speakers in the back. I was using an old pioneer 2ch amp to power them all. When I hooked up this soundstream 4ch it really brought my speakers to life! Much more powerful than anticipated. I was going to get the 100w rms soundstream amp but I am glad I didn't. My speakers are 75w rms and I only have the gain set to half! The individual front and rear filters make tuning a breeze. Great amp especially for the price! !
Pros:
Loud. Easy to install. Price. Looks great too.
Cons:
None I can think of
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5 out of 5

Great Performance, Great Value

Written By Levi H, Ohio on Friday, April 18, 2014
Crutchfield Customer Review (What's this?)
 
This is an amazing amp, hands down. I have this hooked up to a pair of Kenwood 5.25 components and a 6x9 pair of Rockford Fosgates, they sound stunning now that I have this amp powering them. Beware that you probably won't be able to fit anything larger than 8 gauge into the power and ground ports on this, but that certainly doesn't affect the quality of this amp.
Pros:
Powerful, solid build, good value, has RCA outputs as well
Cons:
A little large for it's power range
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5 out of 5

Great bang for the buck!!!

Written By Kirk, Ocean Springs, MS on Saturday, March 15, 2014
Crutchfield Customer Review (What's this?)
 
I'm running two Sound Ordnance M-4050 amps in a 2013 Mustang GT. One is powering a pair of Pioneer TS-D6802R's in the front doors and a pair of Pioneer TS-A6885R's in the rear deck. The other is bridged, powering a pair of 10" Pioneer Champion Series TS-W254R S.V.C. 4 ohm subs. All of this with the stock head unit and a PAC AOEM-FRD24 factory integration adapter. The amps drive everything very well and have the potential to sound great. I say they have the potential because the stock head unit in my car is holding them back. I spent quite a bit of time trying to tune the system and have had limited success, but the I have no doubt the HU is the issue. I ordered a new HU from Crutchfield and should have it in a day or two, my first impressions of the amps are that with the aftermarket HU's adjustability I'll definitely have the sound I'm after.
Pros:
Quality construction and price! Crutchfield technical support.
Cons:
The amps are a little large for their power rating but not so large I couldn't find room to mount them.
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3 out of 5

Awwwww MAN! My Amp Arrived DOA

Written By Sound of Music, Florida on Monday, January 27, 2014
Crutchfield Customer Review (What's this?)
 
Like the title says, the amp arrived DOA. :-( Only the front channels worked. But, the sound from those channels with the rockford fosgate speakers was pretty good. Since this is my first amp, I'm impressed. Very powerful bass imo with the Rockford Fosgate Punch 6 x 9's. I wil not be needing a sub woofer. This set up provides all the bass I can handle. On just the rears, it can vibrate my car pretty hard if I crank it up. And that's without bass boost on. So, when I finally get a fully working on, I think I'll be happy. Since I had a problem, I'm very glad now that it has a 3 year warranty. Crutchfield immediately shipped out a replacement and all I have to do is send the broken one back. They pay the shipping so the Customer Service is darn good. Things happen. Nothings perfect. The replacement should arrive tomorrow. Seems like a long 5 days waiting for the replacement lol.
Pros:
Powerful, clean sound (to my ears) from the working channels. Nice set of controls and adjustments. PRICE! At this price, I would think this is hard to beat.
Cons:
Well, arriving DOA is not exaclty a PRO. Kinda big. Just get the measurements and make sure it will fit before you buy. Easy.
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5 out of 5

Great Sound for the Price

Written By Charles, Garland, TX on Tuesday, January 14, 2014
Crutchfield Customer Review (What's this?)
 
Just finished installing this amp in a 2002 Monte Carlo. I'm very impressed with the performance and sound quality of this amp.
Pros:
Easy to install, great price and sounds great...
Cons:
None
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4 out of 5

Great bang for the buck!

Written By Braden B, Austin, TX on Thursday, January 02, 2014
Crutchfield Customer Review (What's this?)
 
Great feature set for the money with awesome s/n comparatively. Hooked this up to a set if focal 165ag1 rears and Polk db6501 component fronts and it sounds fantastic. Crossovers work well and have many adjustments. Overall great so far, however it's a bit large for the amount of power it's producing.
Pros:
Cost, features, s/n, warranty
Cons:
Size
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4 out of 5

Great amp for the price

Written By Anonymous, Atascadero on Tuesday, December 03, 2013
Crutchfield Customer Review (What's this?)
 
Good amp sounds great
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3 out of 5

GM & S. O. Amp

Written By S. O.,, palm beach, Fl on Tuesday, October 22, 2013
Crutchfield Customer Review (What's this?)
 
not specific on the requirement to use an interface. I hade to replace the radio and install an interface.. The turn signals and chimes are the issue !
Pros:
lot of power
Cons:
poor sound without the interface (I hope)
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5 out of 5

great product, great price, great customer service

Written By roy, grand rapids, MI on Thursday, September 05, 2013
Crutchfield Customer Review (What's this?)
 
I purchased this amp add an upgrade to my aftermarket speakers and deck. It is everything I asked for and more. Easy install ready to tune and puts out high quality sound. It doesn't run very hot which is a plus and everything on it is high quality.
Pros:
Original sound out of a litre priced product
Cons:
It is a little bit bigger than I expected but still manageable.
3 out of 3 people found this helpful
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5 out of 5

sound ordnance amp

Written By johnj, williingboro nj on Monday, August 12, 2013
Crutchfield Customer Review (What's this?)
 
this amp was very easy to install and and has all the adjustments to make your speakers sound crisp
2 out of 3 people found this helpful
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5 out of 5

I'm convinced

Written By impossibledone, Granite Falls, Washington on Thursday, August 08, 2013
Crutchfield Customer Review (What's this?)
 
I installed this in a 90 F-150 with super cab, with an Excelon head unit, two Kenwood Excelon 6 3/4" component speakers and a S/O 12" vented sub on the bridged rear. For a while I drove it without turning up the gain and it sounded OK. Then I set the crossovers and adjusted the gains, WOW! I am a musician and an engineer and have always loved good sound and solid equipment and I was so pleased that I bought the S/O 4075 and 2100 for my wife's vibe with kenwood spkrs and Bazooka sub (it was the most space I was willing to give up in the vibe).

Unless you have a sound lab calibrated ear and your vehicle makes absolutly no sound going down the road you will be happy with S/O.

I recently spent $2500.00 for focal amps and speakers for my project car (1979 Riviera) and yes it sounds better, but you can't beat S/O with anything that costs 3x as much.

Oh BTW, the people who are breaking cases and connections should try a little finesse!
Pros:
Sound Quality, Power, PRICE!
Cons:
Finding a place to put this stuff in a truck cab!
3 out of 4 people found this helpful
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3 out of 5

Good amp, bad power connection

Written By RonG, Madison, WI on Monday, July 22, 2013
Crutchfield Customer Review (What's this?)
 
The amp works great, puts out good sound.
Pros:
Easy to install, good set-up instructions, good value.
Cons:
The shiny metal on the upper edges of the amp are grounded. When you tighten the screws for power and speakers, the shaft of the screwdriver will touch that edge. If the amp has been turned on, sparks will fly (yes, even if the power cable is disconnected at the battery terminal. The amp stores a fairly big charge). Still, it seems wise to re-tighten the connections after a day or two. Mine had become a bit loose.
1 out of 2 people found this helpful
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5 out of 5

Solid choice

Written By PatrickH, SC on Sunday, July 21, 2013
Crutchfield Customer Review (What's this?)
 
Installed this amp in my Dodge Ram 1500 to run a set of 6.5 components off the front channels and a single 10" sub off the back channels (bridged). Sound is very clean at all volumes. Some others have mentioned the amp seems larger than necessary, but I don't think it's excessively large by any means. You simply can't beat the value of this amp when considering the quality of sound and VERY low price!
Pros:
price, sound quality
2 out of 2 people found this helpful
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5 out of 5

Great Amplifier

Written By Tiern14, Sandwich Ma on Saturday, July 06, 2013
Crutchfield Customer Review (What's this?)
 
This amp works great and sounds awesome. I have had only one problem with a ground loop but that isn't the amps fault
Pros:
Loud sound Easy install Many tuning options
Cons:
Big and bulky for small car but no problem for my truck.
2 out of 2 people found this helpful
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5 out of 5

Sound Ordnance 4050

Written By Judd S., Los Angeles on Thursday, July 04, 2013
Crutchfield Customer Review (What's this?)
 
Sounds good for the price. Very loud and clean. Perfect size to fit under the seat of my truck.
Pros:
Loud, good price, easy install
Cons:
Plastic wire covers are a bit flimsy.
2 out of 2 people found this helpful
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5 out of 5

Worth the money

Written By Anonymous, Verplanck ny on Sunday, June 23, 2013
Crutchfield Customer Review (What's this?)
 
Worth the money
1 out of 2 people found this helpful
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5 out of 5

Sound OrdnanceT M-4050

Written By Rp, Schuylkill Haven, Pa on Monday, June 10, 2013
Crutchfield Customer Review (What's this?)
 
Never had an amp in years. Installed unit under back seat of my F-150, although it is rather large in size, what else do you keep under a back seat of a pick up? I also installed a Sony MEX BT3100P head unit, Fosgate 1683 Punch series speakers front and rear. Wiring took up most of the time since you need to run new speaker wires, power from battery and of course the RCA cables from amp to head unit. You'll want to purchase a power cable kit, If you want to maintain front and rear fader you will need a second pre-amp RCA cable, then on the Sony head unit program the sub output to speaker out. Crossover and settings on amp were straight forward. Mounting unit to bottom of seat I had to be creative. Are there better more expensive amps, perhaps. For me it works very well, my system is loud and clear.
Pros:
Good value for the money, simple to set up
Cons:
Large size and mounting hardware needs improvment
1 out of 1 people found this helpful
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5 out of 5

Great amplifier !

Written By Dawson, Indianapolis on Sunday, June 09, 2013
Crutchfield Customer Review (What's this?)
 
This amp was very impressive. I rewired the speaker wire to my 1999 Honda Accord and used two sets of Kicker speakers. The amount of bass I got out of these speakers was completely dependent on this amplifier. Without the amp, the speakers were fairly flat and unimpressive. This amp brought the power to life and the sound changed completely. With the x-over switch on, the bass comes over very deep even without a sub. I would highly recommend Crutchfield's Sound Ordanance.
Pros:
Easy installation , fit under passenger side seat, provides great power and sound
Cons:
The cooling vents are only on one side. The amp gets fairly warm when using if not faced the right way.
1 out of 1 people found this helpful
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5 out of 5

Sound Ordnance™ M-4050

Written By Anonymous, Chesapeake, VA on Sunday, June 09, 2013
Crutchfield Customer Review (What's this?)
 
Great Amp. Sounds great, and delivers a big punch...
Pros:
Great delivery...
Cons:
none
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5 out of 5

Bang for your buck

Written By Cormac M, Janesville, WI on Tuesday, May 28, 2013
Crutchfield Customer Review (What's this?)
 
While this is my first purchased amplifier and I cannot compare it to others; the sound ordinance amp fits my needs perfectly. Using the 4 channels I run ample power to my four kicker speakers. Producing crisp notes and powerful volume I couldn't have asked for a better product.
Pros:
4 Channel EQ tuning Frequency adjusters Crisp sound Powerful volume
Cons:
Large amp Heats up from regular use
3 out of 3 people found this helpful
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5 out of 5

Sound Ordnance M-4050

Written By JerryE, Council Bluffs, IA on Saturday, May 25, 2013
Crutchfield Customer Review (What's this?)
 
Easy to install and setup. Sounds great.
Pros:
Ease of Install
Cons:
Wish it was a little smaller so it could be tucked away easier
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5 out of 5

Bang for the Buck

Written By TomB, Amity, PA on Wednesday, May 22, 2013
 
If you are on a budget, but do not want budget sound...You will want this amp. I just finished the install in my 1998 Jeep Cherokee today. Kenwood headunit, this amp, 35watt RMS Pioneer speakers in front doors, an a 10" Kicker Comp in a truck box mounted behind front seats. I had a similar setup in a Cherokee that I owned previously, the only difference being the amp. My budget this time around was limited, even though my install space was not. It is a big amp..yes....well worth the money?? Absolutely!!! My sister has been tossing around the idea of me installing a system in her Focus and my Jeep just put the final nail in the coffin on that decision. She thought Amps and Subs were for noise you can hear around the block. This setup is so crystal clear and POWERFUL!!! The 180watts going to the sub (with two channels bridged) is no bull. My old system used a 4 channel Kenwood 800watt amp bridged going to the same kind of box and It cant even be compared. I put in a CD of my sisters (Kenny G's Titanic sound track) and the sound quality between the crystal clear highs and seat vibrating bass made my hairs on my neck stand on end. And that is not my kind of music. WOW..that is all I have left to say...WOW... Long review, but I want folks to know that $100 plus change can really get you a fine amp for your ride. Thanks Crutchfield!!
Pros:
Outstanding power. Nice layout of connections and adjustments...makes for a clean/easy install
Cons:
Are you kidding me?? Umm.....I didn't buy one sooner?? Yes..it sounds that good!!!
3 out of 3 people found this helpful
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5 out of 5

Excellence in Both Product and Sound

Written By DaveJ, Midlothian, VA on Tuesday, May 21, 2013
Crutchfield Customer Review (What's this?)
 
This unit is manufactured very well. The connectors are solid, the surround is solid and controls are excellent. The sound is unbelievable! Rock the JEEP!
Pros:
Great construction, easily installed and mounted.
Cons:
Need some additional mounting aids or points
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5 out of 5

Astounding!

Written By Jimmy, Florida on Monday, May 20, 2013
Crutchfield Customer Review (What's this?)
 
I was astounded at how good my new M4050 sounds for the price! II bought my M4050 last week to replace another older different brand amp that had problems. My old amp was heavier and had a smaller chassis but the M4050 sounds 100% better, has plenty of power and the sound is absolutely crystal clear. I have the front channels connected to 2 pair of Kicker KS60 coaxials and a pair of older Alpine Type R tweeters, and bridged the rear channels to a single 10" Alpine SWE 10" sub in a sealed enclosure. I have put my system through some testing since I installed my M4050 last week and it hardly even gets warm, even after 30 minutes of continuous loud volume. My whole system sounds great, both at high and low volume. When I found out Sound Ordnance is Crutchfield's "house brand" I knew it was a good amp because Crutchfield would not put their name or reputation on a bad product. These Sound Ordnance amps sound fantastic and you just can not beat the price. I will 100% recommend Sound Ordnance to anyone who needs a great amp at a budget price. My M4050 is without a doubt the best inexpensive 4 channel amp I have ever heard. It sounds every bit as good as other amps at 2 or 3 times the price. These Sound Ordnance amps are an excellent sounding amp with plenty of power at a great price. Thanks again Crutchfield!
Pros:
Great sound, crystal clear mids and highs and plenty of power for subs. The amp looks good too. Seems to perform perfectly and not get hot at all. even with both front and rear channels running at 2 ohms.
Cons:
I would prefer a variable bass boost knob or potentiometer instead of a fixed 0, 6 or 12 db bass boost, but that is a very minor issue. The amp is a bit large, but I had room for it. Some have said the plastic mounting brackets break, I could see how that might happen, so it is best to pre-drill mounting holes and run the screws in by hand or a long shank Phillips bit on a cordless drill but be sure to use a drill with a clutch set about in the middle to avoid damaging the brackets.
2 out of 2 people found this helpful
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5 out of 5

great

Written By rob, lincoln on Friday, May 03, 2013
Crutchfield Customer Review (What's this?)
 
Great sound, easy to install and adjust. The sound is really impressive for the price. I bought this to replace a Rockford Fosgate 4 channel amp that cost 4 times the price and it sounds just as good.
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5 out of 5

Awesomeee

Written By Gf, Doniphan, Missouri on Saturday, April 27, 2013
 
It's so wonderful I told my friends about it and this place
Pros:
Everything you need in this amp
Cons:
Nothing wrong
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5 out of 5

Sound Ordnance M-4050

Written By DaveW75, Tujunga, Ca on Wednesday, March 20, 2013
Crutchfield Customer Review (What's this?)
 
Great sound, easy to install and adjust. The sound is really impressive for the price. I bought this to replace a Rockford Fosgate 4 channel amp that cost 4 times the price and it sounds just as good.
Pros:
Great sound, solid performing amp.
Cons:
The side covers are plastic and held onto the unit by 2 allen screws. It is a little annoying trying to attach them after wiring up the amp. I had a difficult time tightening the mounting screws with the cover on.
3 out of 3 people found this helpful
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5 out of 5

Great amp

Written By Kevin, Greenville, NC on Friday, December 28, 2012
Crutchfield Customer Review (What's this?)
 
Great amp for the price!
Pros:
Lots of configuration options. Great power and easy to use.
Cons:
A little larger than some other amps.
1 out of 2 people found this helpful
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5 out of 5

Sound OrdnanceT M-4050

Written By TZ, Michigan on Friday, December 07, 2012
Crutchfield Customer Review (What's this?)
 
It definitely improved the quality over a stock GM unit and for the money it is a good investment
Pros:
low price good quality equipment
Cons:
none really it seems to be a good deal for the price
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4 out of 5

Plenty of Power

Written By Alek, Grand Rapids, MI on Monday, November 12, 2012
Crutchfield Customer Review (What's this?)
 
This amp has plenty of power to drive my Polk db501 front speakers and my Infinity Kappa 693.9i rear speakers. As many have said, the plastic mounting frame feels weak, but it did not break when I screwed it down to the box, so there's that.

A strange note, when screwing down the positive power terminal (onto wire that was NOT yet connected to a power source) my screwdriver arced to the metalicized plastic frame. I checked the fuses, and one of them had blown. I haven't noticed any indication of damage in terms of sound quality, but it was quite surprising and a bit disconcerting.
Pros:
Powerful, clean sound Affordable
Cons:
Plastic Mounts feel Weak and Cheap
1 out of 1 people found this helpful
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5 out of 5

Crystal Clear

Written By JakeW, Buffalo, MO on Sunday, September 09, 2012
 
Hesitant at first, but when I discovered SO was Crutchfields house brand, I knew it had to be good. Couldn't be anymore pleased with this amp. I am running the highs through this amp, they are crystal clear and powerful.
Pros:
It's all good.
Cons:
None
1 out of 1 people found this helpful
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3 out of 5

First time buyer

Written By Bill, Lake Jackson, tx on Tuesday, July 10, 2012
Crutchfield Customer Review (What's this?)
 
This amp was an easy installation and work well with the new JBL speakers that were installed in the door, the price was at the low end but the sound is on the high end. I also purchase a JVC radio with an HD tuner which sounded greate.
Pros:
Great sounding and a good match for the speakers purchased.
Cons:
Amp runs a little hotter than i exspected.
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5 out of 5

Just what I needed at a good price

Written By MikeE, Cave Springs, AR on Sunday, May 20, 2012
Crutchfield Customer Review (What's this?)
 
I was looking for a reasonably-priced amp to power two 6-1/2 speakers plus a 10" sub and this fit the bill perfectly. The built-in high-pass and low-pass filters are just what I needed. As others have mentioned, this amp is pretty big, but I put it in a 32' RV so room wasn't a concern.
Pros:
Nice features at a good price.
Cons:
It may be a little too big for some applications.
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4 out of 5

Great sound!!

Written By Randall, Aurora, Co on Tuesday, March 20, 2012
Crutchfield Customer Review (What's this?)
 
I got this amp for my Jeep..hits under the back seat. makes my speakers sound great..I have a 10'' sub & 5 1/4 hooked up. bridged the sub so it has 180 watts & 50 watts to each of my 5 1/4 sounds great!! Makes my sub bump but I can still hear the words from my other speakers just fine. I was alittle worried about not being able to hear the words having a Jeep Wrangler..But it sounds better then I thought it would!!
Pros:
Price,sound quality,bass boost,allows you to hookup two subs or one sub & 2 other speakers or 4 smaller spearks.
Cons:
None
1 out of 1 people found this helpful
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4 out of 5

SO M-4050

Written By Zach, Ohio on Saturday, February 25, 2012
Crutchfield Customer Review (What's this?)
 
This is a nice amp for the money, it feels very durable when you are holding it. It has never come close to getting hot or even very warm. It was very easy to set up, everything is labeled well. Crutchfield's tech support is awesome, they were very helpful.

The only thing i would say is bad is the size. I wouldn't even consider it a bad thing really, just if your trying to conserve space it is a bit bigger than other amps of the same power. It doesn't really matter to me because my subs already take up the whole trunk so i'm not going to be putting anything else in there anyways haha
Pros:
good quality, doesn't overheat, labeled well, terminals are easy to use/switch wires etc
Cons:
i little bit big
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4 out of 5

Big sound, big amp

Written By A. Hennessy, Boston, MA. on Thursday, February 23, 2012
Crutchfield Customer Review (What's this?)
 
Probably the best upgrade I made to my system. Easy set up and Crutchfield even helped with the crossover settings when I called tech support. Songs that you have heard thousands of times sing with detail that you have never heard before. If you listen to a lot of music in your ride it is worth the price to upgrade the sound. The only drawback was the size of the amp, it is big compared to other similarly powered amps. If you have to install this in a tight area it might make adjustments a pain. I have bought several Sound Ordnance products and they were well worth the investment. Life is too short to listen to lousy fidelity.
Pros:
Great sound, very loud, very reasonably priced. Great tech support.
Cons:
Very big, whats up with the dog tags?
1 out of 1 people found this helpful
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1 out of 5

Ok when it's warmed up.

Written By Jack, Mission Viejo CA on Saturday, January 28, 2012
Crutchfield Customer Review (What's this?)
 
This amp works well once it gets warmed up but for the first five minutes of driving all I hear is a loud rumbling noise even with the source turned all the way down.
Pros:
Looks nice and good sound.
Cons:
Needs to warm up before clean sound comes.
2 out of 11 people found this helpful
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3 out of 5

SO M 4050 amp

Written By Jeremy, FW, Indiana on Saturday, December 31, 2011
Crutchfield Customer Review (What's this?)
 
I bought this for my wife's Jeep Liberty. We were trying to do something on a budget and beat the factory sound. We're pushing a set of Pioneer 6 1/2 separates and another pair of 6 1/2 Pioneers for the doors, all off the front 2 channels. The rear channels are bridged and driving a single 10" Rockford Fosgate sub. The set up was an afterthought when the 4 Pioneers didn't deliver the sound that we wanted. The same afterthought resulted in the set up that we now have. The amp is seeing a constant 2 ohm load and seems to perform well. No sound complaints what so ever. She does not have fader control now, but never used it anyway.

The mounting brackets are mediocre at best. Plastic, c'mon! You need to slide a screwdriver through a hole in the top of the amp to screw it down. Holes are too small and also preclude you from using proper screws. When looking into sub options, I opted to go away from the compact powered Sound Ordnance sub because of a customer review indicating that mounting of that sub was also poor. It wouldn't be fair to say that their R & D department designed and built nice stuff but failed to actually install it in the real world, but I have thought it.
Pros:
Sound, performance, price.
Cons:
Mounting brackets.
4 out of 4 people found this helpful
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4 out of 5

Great

Written By RK, Wi on Wednesday, December 28, 2011
Crutchfield Customer Review (What's this?)
 
I got a whole entry level system for my sons truck. All Sound Ordinance; 4 speakers, 4 channel amp and the 8 inch sub connected with a JVC head unit. I was not to impressed when i opened the boxes but i thought lets give them a shot. After everthing was connected I was blown away with how good it was for the price. You will not win any sound audio contests but if you want a good everyday audio system you will not be disappointed. PS: That little 8 inch sub is awesome I just wish it had mounting brackets.
Pros:
Great amp.
Cons:
nothing yet.
1 out of 1 people found this helpful
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4 out of 5

Big for the power

Written By Geoffrey, Rochester, NY on Friday, September 16, 2011
Crutchfield Customer Review (What's this?)
 
It does the job well but check out its size. It is big for the power output. The unit has chrome plated bezels near the terminal blocks so don't try to tighten the power terminal with the battery connected. Oops.
1 out of 1 people found this helpful
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4 out of 5

Good quality amp for the money

Written By KB, Badin NC on Wednesday, June 08, 2011
 
Bought this amp to replace the factory amp in my 99 BMW 328ic. Sounds great and didn't have to spend big bucks to get it. Tech support was great in finding a problem with the first amp shipped, second was shipped free of charge and as always it was on my doorstep within a couple days. Would definitely buy this brand again. Thanks Crutchfield
1 out of 1 people found this helpful
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4 out of 5

Good sound but a little cheap

Written By Rico, Washington, DC on Friday, April 29, 2011
Crutchfield Customer Review (What's this?)
 
Got this to power some Polk 6 1/2 slim mount speakers. This baby drives
them harder than I was expecting so I'm definitely satisfied with the sound,
and it was a solid price (at least at the time I bought it).

My only knock would be that the parts of the amp where you screw it down are
plastic. Therefore as soon as the install tech started to screw it down, the
pieces broke and they had to use some mounting straps instead. There's no
functional impact, but the construction could be of a little better quality.
3 out of 3 people found this helpful
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5 out of 5

good value

Written By Kevin, Ellington CT on Monday, April 25, 2011
Crutchfield Customer Review (What's this?)
 
easy to hook up and good sound - built well
1 out of 1 people found this helpful
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1 out of 5

Sound Ordnance™ M-4050

Written By DustinD, Shiloh, IL on Thursday, March 17, 2011
Crutchfield Customer Review (What's this?)
 
First off, this amp is BIG for what amount of power it puts out. When compared to most amps comparable in power ratings, I would say it is EASILY 150% larger than your average amp housing.

Sound quality is horrible! The music sounded hollow and not life like at all. I installed a Kenwood amp in it's place and sounded 200% better.
2 out of 10 people found this helpful
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5 out of 5

At Ease

Written By Doug, Olympia, Wa. on Sunday, October 10, 2010
Crutchfield Customer Review (What's this?)
 
Short/sweet & to the point. After spending good money on a nice Pioneer head unit w/4 Polk speakers, something was missing. The system sounded great but just didn't have the fidelity and crispness I was looking for. After years of outstanding support from Crutchfield, I decided to go with their very own Sound Ordnance 4050, 50wX4 amp. After hooking it up and fine tuning everything it is just amazing. I can clearly hear drummer taps and fingers sliding down the guitar strings. Now that's the clarity I was looking for. I can crank it with zero distortion, enough to make your ears hurt and hair move. The clarity is incredible, no humming in the speakers, the price is outstanding and a 3 yr warranty, I would highly recommend this unit to anyone, even for competition purposes. I feel my money was well spent. Definitely worthy of a Corvette.
8 out of 8 people found this helpful
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4 out of 5

Sound Ordnance™ M-4050

Written By ortiz, new york on Saturday, August 28, 2010
Crutchfield Customer Review (What's this?)
 
I bought this amp trying to save some money yet get as much power and sound i could
as well as versitility. This amp did just that. I had beed blogging a lot on crutchfield and i
was recommended this amp to power my two front speakers and my single 12" sub.
Being that i drive a coupe, the inside of the car is small so those front speakers easily
brought extremely loud sound throughout the car and the rear speakers did great to fill in
the rest of the sound. Definetly a great buy, hopefully it lasts me. Only con i found so far
is that I didn't realize how hot they get so i had to move it to a more ventalized area in the
trunk.
5 out of 5 people found this helpful
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5 out of 5

IMPRESSED

Written By Dustin, Locust Grove, GA on Monday, May 31, 2010
Crutchfield Customer Review (What's this?)
 
I bought this for my van because my new radio had very low watt output, and as its a diesel powered Econoline, it needs to have some power to cover the engine noise. Anyway, this amp provides crisp clear highs to my tweeters up front, and FLAT OUT AMAZING thump to the tail doors! Seriously, if I hadn't already installed subs, I wouldn't have bothered with them. Plus it looks great mounted to the wall, and I've got an army buddy that likes the name.
3 out of 3 people found this helpful
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4 questions already asked Show all answers

What is country of origin...where is is made? [ richard  Jul 06, 2014 ]
1 answer
  • We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Krissy Staff  Jul 09, 2014 ]
how many subs did you put in this amp? [ Teodorico  Apr 06, 2014 ]
10 answers
  • Sorry it took so long That's a 4 channel amp . You hook up your 6x9 rear speakers , door speakers that's about all if you want to hook up 2 , 10"subs get the s/o 1350 [ JESUS E   Apr 12, 2014 ]
  • I put one have a truck and don't have MUCH ROOM BUT THIS AMP HAS PLENTY OF POWER FOR MORE [ JOHN   Apr 09, 2014 ]
  • 2 - infinity 10's this amp isn't what u think I don't like it. [ ANTHONY R   Apr 07, 2014 ]
  • I didn't throw a single sub at this bad boy. I did, however; put some powerful full-range speakers in my car and attached them to that amp. They are LOUD and crystal clear. I know for a fact that this amp could power a few decent subs or one or two powerful ones without a hiccup. [ WOODROW CULPEPP   Apr 07, 2014 ]
  • None. I am driving 2 6x9's with it, and using an mp3 player instead of a head unit. [ KURTIS   Apr 07, 2014 ]
  • One 10 inch [ THEODORE   Apr 07, 2014 ]
  • Just one bazooka tube in a boat. Had to turn this down to minimal output cause it was too much juice. I'm. Not a full blown stereo dude though, just a regular guy. [ CORBYN   Apr 07, 2014 ]
  • Zero. I used it to power 2x 100w mids by Polk. [ ERIC   Apr 07, 2014 ]
  • One sub. I think it can take two. [ RONALD W.   Apr 07, 2014 ]
  • Just one bazooka tube in a boat. Had to turn this down to minimal output cause it was too much juice. I'm. Not a full blown stereo dude though, just a regular guy. [ CORBYN   Apr 07, 2014 ]
Would this amp have enough juice to power a set of component speakers as well as a single 12" sub? [ John  Jan 25, 2014 ]
1 answer
  • Thanks for your question. For information on selecting the best amp for your speakers I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Krissy Staff  Jan 26, 2014 ]
how does this compare to the other amps out there? [ Aaron  Jan 04, 2014 ]
9 answers
  • Good evening Aaron, i wish I could help but returned the unit due to the size. [ JUAN   Jan 06, 2014 ]
  • I have had no issues with it and it is very easy to adjust and gives good power output. [ LANCE C   Jan 05, 2014 ]
  • it's ok but you get what you pay for. [ ANTHONY R   Jan 05, 2014 ]
  • Aaron I purchased this for my daughter's car and it is awesome! She and her friends get rocking and I can hear her coming home a block away. (not good for neighborly accord) The quality is way above the other units I looked at. The only negative , and it's really not a huge deal, but the attaching port for the keyed wire to turn on the unit is for a 10 ga. wire and the wire that is sent to attach there is probably a 16 ga. so you have to fold and solder the end to get it to be captured by the set screw. Other than that its been great. Good value for the money. Dave J [ DAVID R   Jan 05, 2014 ]
  • I just put this in my sons car and was able to crank it up almost all the way up with no distortion. I will be putting this in my hot rod as well! Money well spent! [ GERALD   Jan 05, 2014 ]
  • It's a quality amp for a significantly cheaper price than the name brands out there. I bought it with kicker 3ways in the back and it brought the life out of those and was hitting wayyyy lower notes than I could get with the kicker 30w amp I had. Definitely would suggest buying it. [ DAWSON   Jan 05, 2014 ]
  • I was a little skeptic about this amp when i was searching for one for my speakers, but for the price and everything, i figured i'd give it a try. I was very pleased first of all with the service from crutchfield and the easy of installation. Everything on the amp is marked very well and its very self explanitory. The quality of the amp is great too! The output you get is just so clean and for the price, its pretty much unbeatable. You can get the same from alpine or kenwood or any others for that matter, for double the price though. Definately would recommend it, especially if you're trying to stay in a budget. [ MALINDA J   Jan 04, 2014 ]
  • This was my first so I'm not sure how it compares with others. But i can tell you that it is really good And has held up well. No problems [ THOMAS   Jan 04, 2014 ]
  • I really enjoy this amp for the price and design but tuning it can sometimes be a hassle since it's Angled oddly. Overall it's a great product [ OSVALDO   Jan 04, 2014 ]

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For a more in-depth review and enhanced detailed information on the Sound Ordnance™ M-4050, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_777M4050/Sound-Ordnance-M-4050.html ).