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Sound Ordnance M350-1

Compact mono subwoofer amplifier — 350 watts RMS x 1 at 2 ohms

52 Reviews | 11 questions - 24 answers

California customers: Please click here for your Proposition 65 warning.
Overview

Our take on the Sound Ordnance M350-1

Your vehicle's interior is like an audio battlefield with your music fighting to get heard over the noises of the wind and road. Sound Ordnance's M350-1 mono subwoofer amplifier can provide up to 350 watts RMS to your sub — more than enough power to overcome all the sonic enemies of clean loud bass. A wired remote lets you control the level of bass action from the comfort of your front seat.

Give your bass some firepower

Your vehicle's interior is like an audio battlefield with your music fighting to get heard over the noises of the wind and road. Sound Ordnance's M350-1 mono subwoofer amplifier can provide up to 350 watts RMS to your sub — more than enough power to overcome all the sonic enemies of clean loud bass. A wired remote lets you control the level of bass action from the comfort of your front seat.

Rugged and compact

A low-pass filter, subsonic filter, and adjustable bass boost allow you to control the bass tone at will. This amp's tiny size allows it to fit almost anywhere in a vehicle. Its tough construction, rugged looks, and 3-year warranty ensure you will enjoy the full power of your music for the long haul. Even better, you can add this Sound Ordnance amplifier to your arsenal at a great price.

Sound Ordnance M350-1 350W x 1 at 2 Ohms Car Amplifier

This little powerhouse gives you extensive control over your bass.

Confused about impedance? Check out our article on matching subs and amps.

Product Highlights:

  • mono subwoofer amplifier
  • 290 watts RMS x 1 at 4 ohms (350 watts RMS x 1 at 2 ohms)
  • Class D amp technology
  • variable low-pass filter (35-150 Hz, 12 dB/octave)
  • variable bass boost (0-18 dB, at 45 Hz)
  • variable subsonic filter (15-55 Hz, 12 dB/octave)
  • wired remote level controller
  • preamp inputs
  • cooling fan
  • fuse rating: 30A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 8-1/4"W x 2-1/16"H x 4-3/4"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Mono amplifier
  • Two 30-amp ATO blade fuses (installed)
  • Wired remote
  • 16' Remote cable (RJ-25 connector on both ends)
  • 3mm Allen wrench
  • Six 3/8" Self-tapping screws
  • 6 Split lock washers
  • 6 Flat washers
  • Owner's Manual

Love this amplifier. It pushes my subwoofer so hard. It pairs very nicely. Great size to place anywhere in a vehicle it is very small but very powerful.

Tim, Byron Center, MI

Reviews

Sound Ordnance M350-1 Reviews

Average Customer Review(s):

(52 Reviews)

Awesome, Love it!!

Tim from Byron Center, MI on 1/18/2019

Love this amplifier. It pushes my subwoofer so hard. It pairs very nicely. Great size to place anywhere in a vehicle it is very small but very powerful.

Pros: Size, Power

Cons: None

Great Amp!

Manny from Boise, ID on 10/22/2018

Crutchfield Customer Review (What's this?)

Great little amp! It gets the job more than done. The bass knob is an awesome feature to control the bass. I have the bass level on the head unit all the way down to the lowest setting and adjust as needed using the knob. Depending on the genre, I don't have to move it much. I like subtle bass, not too much where it drowns out the mids and highs and creates that annoying rattle you see/hear often in cars.

Pros: It's fun size, so it doesn't take up much room and sounds great!

Cons: As of this review, I have none.

Sound Ordnance M350-1

Crutchfield customer from Kathleen, GA on 9/17/2018

Crutchfield Customer Review (What's this?)

Great amp!! Perfect for what I needed. Easy to install and very compact as I did not have much space.

Pros:

Cons:

Great amp small package

Jason from Fuquay Varina, NC on 8/14/2018

Crutchfield Customer Review (What's this?)

Geat little amp. Fit under my wranglers seat no prob.

Pros: Size, quality, price

Cons: None

Sound Ordnance M350-1

Crutchfield customer from San Jose, CA on 7/22/2018

Crutchfield Customer Review (What's this?)

awesome, piece of cake to install!

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So Far So Good

Shawn from Waianae, HI on 6/18/2018

Crutchfield Customer Review (What's this?)

Great looking unit. Love the subsonic filter. Time will tell how durable an amp this is.

Pros: Great looks. Awesome tuning capability.

Cons: None.

Sound Ordnance M350-1

Crutchfield customer from Tucson, AZ on 5/31/2018

Crutchfield Customer Review (What's this?)

Nice and shipper

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Cons:

Sound Ordnance M350-1

Crutchfield customer from Wenatchee, WA on 4/6/2018

Crutchfield Customer Review (What's this?)

Small and compact for my 92 YJ. Fit it under a centra-pod (between my front seats) and it powers an 8 inch Kicker really well.

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Sound Ordnance M350-1

Alex from Barrington, IL on 3/30/2018

Crutchfield Customer Review (What's this?)

Amazing quality especially from the size. It really is smaller than you thin but it gets them subs going real well! I used this amp for 2 12s and they go real well with them and I'm really happy with the product. I would definitely recommend this to anyone looking to hook up a sub or two!

Pros: Small and fits almost anywhere and gives great power

Cons: None! :)

Sound Ordnance M350-1

Crutchfield customer from Hobbs, NM on 3/15/2018

Crutchfield Customer Review (What's this?)

Very sleek looking on the board - delivers just the fight amount of power for the Kicker Comp VR Sub. Can't believe you get this quality at this price.

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Sound Ordnance M350-1

Holden from Amherst, VA on 2/18/2018

Crutchfield Customer Review (What's this?)

Sounds great for just a little amp. Really makes my single 12 hit

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Compact & Loud

Garrett from Baltimore, MD on 1/9/2018

Crutchfield Customer Review (What's this?)

Very easy to install and very compact. Works and sounds insanley awesome compared to its size. I'm very happy with the product.

Pros: Compact 350W Pounds hard.

Cons: I have none

Sound Ordnance M350-1

Phillip from Dickinson, ND on 12/17/2017

Crutchfield Customer Review (What's this?)

Tom recommended this to give my 10" SO subs a bit more power, i had been running them off an M2100 amp and they did ok but hoping when i get it all installed itll really punch it up. Will let you know when.i get it going. But size is perfect and what i was looking for so far so good

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Sound Ordnance M350-1

Matthew from Chicago, IL on 12/4/2017

Crutchfield Customer Review (What's this?)

Bought this to power a JL Audio Stealth Box with a single 10" sub. The compact size fit into the space well and provides plenty of power. Easy to install, no complaints

Pros: Compact size, plenty of power for the single 10" JL Audio sub, remote control knob

Cons:

Lots of punch in a small package

Tom from Youngstown, OH on 11/28/2017

Crutchfield Customer Review (What's this?)

I purchased this amp to power one 10" subwoofer tucked into an enclosure in my space challenged 05 Nissan Frontier. My 4 channel Sound Ordinance amp was tucked into that spot, so I had to move it under the passenger seat. I was pleased to find that I could also locate this M350-1 right next to it. All the controls are easily reached, yet the remote base control makes it even easier to adjust the bass. This is my first experience with a subwoofer in any vehicle I've owned, so I have nothing to compare it to. But I must say, this thing rocks! My daughter doesn't complain about sitting in the back seat any longer as she prefers the massage provided through the sub. As usual, Crutchfield customer service is second to none. I'm really enjoying my tunes now that I can feel the music, not just hear it.

Pros: Small size Lots of control options Runs cool

Cons: None that I can figure out.

Needs better cooling fins.

BRADLEY from Santa Rosa, CA on 10/30/2017

Crutchfield Customer Review (What's this?)

It's not disaster proof, so if you find your vehicle engulfed in flames, this amp may not make it. If it survived I would have given this 6 stars. The compact size of this amp was my main selling point. Price is great and the sound was pretty good! overall a great buy.

Pros: Small size Lots of power attractive looking

Cons: Doesn't do well in a fire. Gets too hot. Melts. Won't turn on after.

Sound Ordnance M350-1

Crutchfield customer from Williamsburg, va on 10/10/2017

Crutchfield Customer Review (What's this?)

For such a compact amp it is considerably powerful. Sound good also. It has quite a few features. Only downside was 2 things. 1 is the bass control isn't that effective. 2 the side beauty Platte screws were 3 different size allen keys.

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Sound Ordnance M350-1

Terry from Grand forks, ND on 9/25/2017

Crutchfield Customer Review (What's this?)

I have this amplifier pushing the Sound Ordnance B-12 ported enclosure. It is an extremely small amp, but seems to power the sub well. The price makes it a value, also. Haven't had any issues with it shutting off or going into protection mode. So far, I am pleased with this amplifier

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Sound Ordnance Amp with a Kicker Sub sweet combination

Tagg101 from APO in the UK on 9/24/2017

Crutchfield Customer Review (What's this?)

Works well and is an excellent match for the Kicker sub recommended by the Crutchfield staff.

Pros: Small amp with just the right amount of grunt. Because of the size there are a lot more places throughout the car that facilitate mounting.

Cons: None

Just what I needed!!

Jesse from Lafayette, LA on 8/22/2017

Crutchfield Customer Review (What's this?)

Needed a small amp (both in size and power) just to push my sub. This unit was recommended by Buddy (freaking awesome customer service from him and the whole group at Crutchfield!!) and I couldn't be happier! Long time Crutchfield customer and that won't be changing anytime soon!

Pros: Compact, power for size!

Cons: None so far!

Great amp, great help from Crutchfield!!

Jonathan from VA on 5/30/2017

Crutchfield Customer Review (What's this?)

I chose the Sound Ordnance M350-1 due to the smaller size to fit under a Jeep JK passenger seat. Instead of a sub enclosure that would take up what little room is available, I installed a Clark Synthesis TST209 Tactile Transducer Bass Shaker. The bass produced by the Clark Synthesis is felt in the seats (including passenger seat) and after a few days I could not tell that there was not a sub enclosure. It did take a few days to get the bass settings on the Sound Ordnance M350-1 adjusted, but the good folks at Crutchfield helped me out.

Pros: Small size, does not run hot, can be adjusted to provide the signal you need for just about any size/type of subwoofer.

Cons: None

It WAS good

Shane from Smyrna, GA on 5/7/2017

Crutchfield Customer Review (What's this?)

This amp has been great....for about a month. Now, it won't power on. Starting the return process.

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Sound Ordnance M350-1

Crutchfield customer from Pratt, KS on 5/7/2017

Crutchfield Customer Review (What's this?)

So far it's been great! A lot smaller than I expected but fits under the seat very well

Pros:

Cons:

big punch in a small package

Raul from Rancho Cucamonga, ca on 4/17/2017

Crutchfield Customer Review (What's this?)

Great amp. Small, compact and nice. It's pushing my 10" kicker in a sealed enclosure really good. Just the right amount of bass I was looking for!

Pros: SMALL UNIT, PACKS A GREAT PUNCH!

Cons: NONE

tiny yet powerful

mike from brooklyn, NY on 4/13/2017

Crutchfield Customer Review (What's this?)

I bough this to power a single DVC 2 ohm rockford P2. When I opened the box I laughed because this thing is tiny. Don't let it fool you, I had to turn the amp gain down to 70% because it was to much for the sub. I'm happily surprised with this amp and will definitely be buying SO products again. Fyi Crutchfield customer service is top notch, worth the few bucks extra to have them there for you.

Pros: Tiny, powerful,stays cool

Cons: Seriously nothing

SOLID

Christopher from Schertz, TX on 4/5/2017

Crutchfield Customer Review (What's this?)

Great mono amp for my single 10 in sub. Connections are secure and much tunable.

Pros: Small size. runs cool. Tunable

Cons: None yet

Sound Ordnance M350-1

Thomas from Rutherford, NJ on 3/18/2017

Crutchfield Customer Review (What's this?)

Great power from such a small piece

Pros:

Cons:

Size doesnt matter!

Joe from Newport News, VA on 3/17/2017

Crutchfield Customer Review (What's this?)

Amazing power for Rockford Fosgate Punch P1-2X10. Small size makes it perfect for installation practically anywhere. I originally purchased the MTX all in 10" sub for my Mercedes GLK 350, but it just wasnt giving it the punch I was looking for. Easy swap over from the MTX to this new combination and what an amazing difference. This combination is exactly what I was looking for!

Pros: Umm everything about it is a pro!

Cons: No mounting screws provided, really not a con but that was the only negative thing I could think of. Recommend 3M double sided tape for the bass power knob provided in kit so you dont have to screw into your vehicles interior if you want easy access.

Bid power in a small pakage

ivan from San Juan, PR on 3/14/2017

Crutchfield Customer Review (What's this?)

Its as great as my other Sound Ordenance amp that I have for the mid and high tone speakers. I am powering a 10 sub and this amp has plenty of power in a small housing. I am running in at low volume and still have huge power and the remote bass controller let my to adjust the bass volume without touching my radio settings. Great product and I recommend to anyone.

Pros: Small enough to fit in tight places and power full with remote volume.

Cons: N/A

Unbelievable performance from a small package

Barry from Edmond, OK on 2/6/2017

Crutchfield Customer Review (What's this?)

I read the reviews of this amp but still hesitant due to the low price point but thought I would try it anyways. Wow! I am truly impressed. I have it hooked up to a 10" Kicker comp in a ported box in the trunk. I did not think such a small and cheap amp would push like it does. I would recommend this for anyone on a budget or just don't want to spend big $ on a amp to push a sub. I don't want to bounce my rear view mirror so one sub and this amp is perfect for me. Gives plenty of bass for those 80's hair band tunes. Glad I bought it.

Pros: small footprint easily fit under seat powerful for size internal fan

Cons: none at this time

Small and powerful

syed from Cooperstown, PA on 2/2/2017

Crutchfield Customer Review (What's this?)

So, this thing is tiny! I am powering 2 rockford fosgate 10" R1 subs. Works perfect, plenty of power. Just cant believe how tiny it is!

Pros: Very small form factor, lots of power, free sticker!

Cons: power,remote,ground input very close together in a single cluster, would be better with a little more space between them.

Sound Ordnance M350-1

Crutchfield customer from Las Vegas, NV on 1/23/2017

Crutchfield Customer Review (What's this?)

Can't believe the power this little amp puts out, when I opened the box I started to think what this thing is to power 2 tens, NO WAY! Then I turned it on OMG the subs hit perfect and with bass knob easy to control DJ Joe NV

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Awesome little amp with big power!

Leslie from Washington, DC on 1/3/2017

Crutchfield Customer Review (What's this?)

This little amp is awesome. Installed it to run my sons 12" S/O sub and it pounds! Great little amp for a great price. It really packs a lot of power for a little bit of cash.

Pros: small footprint, low heat, adjustable, great price, lots of power

Cons: none

Little Pounder

Raymond from Las Vegas, NV on 12/29/2016

I don't know much about sub amps. I just wanted something to power my generic 10" 4ohm subwoofer. The old cheapo Dual unit never worked right and then shorted out. The sub is in the rear of my Fox Mustang hatchback. Following the tuning instructions from my advisor, the setup was fairly easy. This little unit pounds out bass way harder than I need. I can turn the gain way up before it distorts. I'm pleased with the recommendation I received for this little amp.

Pros: Small size, fits under seat EZ. Forgiving with generic subwoofers. Bangs harder than I need. Sounds clear.

Cons: Mounting screw location is too far behind top cover. Makes it hard to set the screw in straight.

Great Little Amp

Christian from Knoxville, IA on 12/14/2016

Crutchfield Customer Review (What's this?)

Great little amp. I have it powering my 4ohm 10" Alpine Bass Line sub in a sealed box. Wow. Very impressed with this amp so far. I was just looking for something to cover the lows in my music, and this definitely does the job. I mostly listen to rock/metal as well as some country. My wife listens to a lot of pop, and this amp/sub makes everything sound awesome! The 3 year warranty is what made me go for this over other brands. That, as well as the excellent customer support I've gotten. Thanks!

Pros: Simple Setup Great Power Looks Good

Cons: None So Far

Great Sub Amp

Crutchfield customer from Charleston, SC on 12/4/2016

Crutchfield Customer Review (What's this?)

Great amp. I have it pushing a Kicker dual 1 ohm voice coil 8. Wired in series per Crutchfield advisor. Nice fit and finish. I already have a 4 channel Sound Ordnance pushing my components/tweeters. Both are work great. Great value. 4 stars due to two gripes on the sub amp though. The wired control (great by the way) is hard to fish through carpet, etc. with the plugs. Also, the connections for the SO amps are angled down for some reason and can be hard to connect in tight spaces. Not sure why they can't have a harness that plugs in. Minor gripes. Great amps. Will buy again.

Pros: Great value. Wired controller.

Cons: Wire for controller can be hard to fish. Wire connections to amp can be difficult to make in tight spaces.

Sound Ordnance M350-1

Crutchfield customer from Loveland CO on 11/13/2016

Crutchfield Customer Review (What's this?)

Amazing amp. Powers my 2 10 inch subs with clean power

Pros:

Cons:

Sound Ordnance M350-1

Crutchfield customer from Germantown, TN on 11/8/2016

Crutchfield Customer Review (What's this?)

Easy install. A nice, compact, and powerful amp. Thanks to Crutchfield......great customer service all around.

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Perfect Class-D Mono Block Amp!

Johnathon from Honolulu, HI on 10/26/2016

Crutchfield Customer Review (What's this?)

Exactly what I was after!!! This Class-D Mono block amp is the perfect application for a low amperage usage for big bass production. Unlike MOSFET amps, this Class-D amp does not require a 1/2- or 1-Farad capicator to operate nominally. Also love the built-in cooling fan and simple, small form factor to operate an average-sized sedan subwoofer system.

Pros: small form factor, built-in cooling fan, comes with the necessary allen wrench, easy to install

Cons: no mounting screws included (not claimed to include, and dependent on mounting surface), requires a very small screwdriver to tune (also not included, not claimed to include)

Good recommendation

Abel from Monroe, NY on 9/16/2016

Crutchfield Customer Review (What's this?)

It's a great product for that price and also compact in size so it doesn't take that much room also like the fact that has it own fan to cool down

Pros: Small and powerful

Cons: Haven't found any

Small size - Big Punch

Jeff from Memphis, TN on 8/30/2016

Crutchfield Customer Review (What's this?)

When this thing came in the mail I thought it was a joke. Seriously about the size of a DVD box set. I couldn't believe how small it was. But when I hooked it up to two JL 10's I realized that big things come in small packages. This thing puts out so much power for the size I was shocked. Fantastic for anyone needing compact space or someone on a budget.

Pros: Compact size, huge performance

Cons: None

The Power behind the thump

Perry G. from Westminster, MD on 8/26/2016

Crutchfield Customer Review (What's this?)

This little package of an amp really puts out clean power to my 10" Rockford Fostgate Punch Sub. I mounted this amp to the sub box I built in under my Ram 1500's rear seat and still has room to breath. I would recommend this amp to anyone who likes a bit of thump without going overboard.

Pros: compact, sleek and plenty of power

Cons: None at all

Little amp, little power

Juniorwar from Kansas City on 7/25/2016

Crutchfield Customer Review (What's this?)

Overheats easily, but decent amp gives a little more power. Doesn't work well for a solo dvc sub. Littl kick

Pros: Small compact

Cons: Not much power for a dvc sub

Big power small package

Japhethwar from Ware Shoals, SC on 7/11/2016

Crutchfield Customer Review (What's this?)

I bought this to compliment my Kenwood head unit when my factory GM stereo bit the dust. I wanted to retain the factory sub and door speakers. The small demintions allowed me to mount this in the factory bracket under the dash with ease. Sounds awesome and works great. Only negative is its too powerful. Smoked my factory sub on 1/4 power, oh well back to Crutchfield go.

Pros:

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Sound Ordnance M350-1

Crutchfield customer from Easton, pa on 7/4/2016

Crutchfield Customer Review (What's this?)

Blew up after only 2 days. Wasn't even pushed hard at all

Pros: Size

Cons: Lacks quality

Crutchfield response on 7/5/2016 Whenever you encounter a problem with anything you purchase from Crutchfield, especially a situation like this, please contact our customer service or tech support teams right away.

Solid Amp small footprint.

Dan C from Cairo, NY on 6/21/2016

Crutchfield Customer Review (What's this?)

The power this thing puts out for the small size of it is more than it's rated for I can't believe how tough this little amp is I would definitely buy another one and absolutely recommend it to people. By the way you could fit this thing almost anywhere.

Pros: Small size heavy duty puts out more then it says can't go wrong.

Cons: None

1999 Sea Ray 380 Sundancer

Travis from Broken Arrow, OK on 5/12/2016

Crutchfield Customer Review (What's this?)

Used to drive JL 10 and it sounds amazing

Pros:

Cons:

An amp made for a Jeep!

Drake from Northport, AL on 4/11/2016

Crutchfield Customer Review (What's this?)

Space is so limited in Jeep Wranglers, but the Sound Ordianance M350-1made upgrading the factory amp/subwoofer possible and more awesome than I ever expected. The factory "subwoofer" in my 2006 Jeep Wrangler begged to be replaced for some serious bass and that meant adding an amp too. I considered several locations for the M350-1, but settled on mounting it under the steering column. There's not many good options for installing an amp in the Wrangler, so the small size of this amp was a positive. The M350-1 is really small but packs big sound. This amp was a great option in the mono-amp application that I needed. After tuning, the amp now pushes the bass through a Kicker 40CWRT672 DVC subwoofer providing some serious thump. I found it easy to adjust the amp to get the sound I like out of my system. (Thanks Crutchfiled for your amp/subwoofer tuning article. It was a great help.) The remote volume knob is discreet but allows for adjusting the bass just enough between different songs or genres of music. The Sound Ordinance M350-1 met all my amp needs in my stereo upgrade project: had to have a small footprint, mono-amp to drive a single subwoofer and quality for the price. I'm super pleased that the amp hit it out of the park in every category.

Pros: Small package delivering big sound.

Cons: Can't find any so far. This amp delivered exactly what it advertised.

Tiny footprint, Huge presence!

Michael from Austin on 3/7/2016

Crutchfield Customer Review (What's this?)

I knew the dimensions before i ordered this but was not prepared for just how compact this amp is, which really opens up mounting locations... this thing is Tiny. The width is smaller than a RedBox video and the length is about about 1 1/2 RedBox video... yes it is tiny. Feels very dense, heavy for its size, it still has the plastic that all other sound ordnance amos have but because it is so small it feels very sturdy. It looks clean too. I love that it comes with a remote knob for mounting up by the driver with 17' so you can put it anywhere. Right now it is powering, with absolute ease a jl 12wx power wedge. I havent properly set the gains yet just did a spot check with some music im building a box for my 10w0v3-4 which is what this amp was purchased for. In the meantime it gives clean, massive sound to the power wedge. This is my second sound ordnance amp and ill continue to save money and use these amps until i outgrow their RMS ranges there is just too much value to pass up. They hit their rated RMS without clipping and they come with a leading industry 3 year warranty, that alone is woth it and since its Crutchfield YOU KNOW they have your back.

Pros: Tiny footprint Huge sound Sharp looking amp Included remote knob 3 year warranty Crutchfield support Pushes its RMS

Cons: None

Nice bang for the buck

Keith from douglasville, GA on 2/24/2016

Crutchfield Customer Review (What's this?)

I previously installed this amp in my Avalon and loved it with a S/O 8" Subwoofer. Not too much but just the right amount of bass. I put one in my Corvette and I bought one for my friend. Absolutely awesome and it comes with control knob you can install under the dash to control the bass up front.

Pros: Inexpensive and powerful. Stands the test of time. 3 years so far

Cons: NONE

Sound Ordnance M350-1

Sara from Wyoming on 10/11/2015

Crutchfield Customer Review (What's this?)

Super small, extreme power! Came with stickers and dog tags, thought that was cool

Pros: Great buy

Cons: None

Exceed expectations

Nate from Indiana on 9/7/2015

Crutchfield Customer Review (What's this?)

Small amp big power

Pros: Enough power to push my Polk 12in. No bass boost needed, set on around 70% with bass at -10 on my head unit

Cons: Has shut down once when I pushed it hard. Came back on after I shut it off

Details

Hands-on research

Product Research

Features
Connections

Features

Power Ratings: The Sound Ordnance M350-1 is a Class D mono subwoofer amplifier with an RMS power rating of 290 watts into 4 ohms and 350 watts into 2 ohms.

Crossovers: The built-in low-pass crossover is continuously variable from 35 to 150 Hz and the slope is 12dB per octave. Because this is a subwoofer amp, the crossover is always engaged.

Sub Sonic Filter: The frequencies that cannot be reproduced by a subwoofer waste amplifier power and can cause damage to speakers. The sub sonic filter, variable from 15 Hz to 55 Hz, removes the signal below the setting to improve the performance of the speakers by eliminating distortion.

Bass Boost: The Bass EQ (bass boost) is continuously variable from 0 to +18 dB and is centered at 45 Hz.

LED Indicators: There are 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.

Wired Remote: The included wired remote allows you to control the output level of the amplifier from the front of your vehicle. The wired remote can be mounted under your dash and the supplied 16' cable, with RJ-25 phone plugs at each end, connects the remote to the amplifier. The remote's dimensions are approximately:

  • Width: 1-5/8" (2-5/8 including mounting flanges)
  • Height: 7/8"
  • Depth: 1-1/2" (2-1/8" including knob and cable)

Connections

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 also a set screw terminal that will accept up to 8-gauge wire. A 3mm Allen wrench is required to tighten/loosen the terminals (included).

Speaker Connections: The speaker output is a screw terminal that will accommodate up to 8-gauge wire.

Signal Inputs: The amplifier has a pair of stereo RCA inputs.

Remote: Connect the included wired remote to the RJ-25 port on the amplifier.

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.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I just bought a Sound Ordnance B-12 to go with it [ J  Jan 16, 2019 ]
This amp was recommended in the past and has great reviews. This will be my first Sound Ordinance product so I cant wait to see how it works! [ Joel  Jan 05, 2019 ]
Great reviews [ Robert  Dec 31, 2018 ]
Needed a small amp to fit under the drivers seat. This one has desirable specs and good reviews. [ Bryan  Oct 18, 2018 ]
Advisor confirmed that this amplifier was a good choice for the subwoofer I chose. [ Richard  Oct 03, 2018 ]
My old amp died on me and the sound ordnance m350-1 uses the same gauge wiring kit. Figured I'd use it. [ Ruben  Sep 27, 2018 ]
Physical size was critical and have had good luck wit S/O equipment in the past [ gene  Sep 03, 2018 ]
Hank also recommended this amp to me along with the Bandpass subwoofer by Sound Ordnance [ Dylan  Aug 22, 2018 ]
Need a miniature subwoofer amplifier for my Lotus. [ RICHARD  Aug 19, 2018 ]
I needed an amp that would run my 10in DVC 4ohm sub at 2ohm... this is the only amp from S/O available. [ Jason  Aug 02, 2018 ]
The amp I had is smoked. [ Robert V.  Jul 26, 2018 ]
I have a couple of identical 8-inch active subs, but their amps started malfunctioning. I liked the sound from those subs, and the black aluminum ported enclosures were beautiful and efficient. So, I decided to keep the subs with the enclosures, but power them from the new amp. This Sound Ordnance M350-1 amp I just bought has the appropriate electrical specs to drive my 2 subs, and is not excessively large: the footprint: is about 8" x 5" rather than about 8" x 8" many other amps have. [ Andrei  Jul 20, 2018 ]
Cole Recommend This amp for the Kicker box i recently purchased. [ STEVEN M  Jul 19, 2018 ]
Small footprint, Good Reviews. Great Price [ Stephen  May 29, 2018 ]
Great price for a fan cooled mono block amp. [ SHAWN  May 28, 2018 ]
This amp was recommend for my sub which has dual 4 ohm voice coils, 50-250 watts RMS and peak 500 watts. [ Nancy  Apr 29, 2018 ]
It has the right RMS for the 12" sub I bought, and it has great reviews on Crutchfield and has a very competitive price. [ Ory  Mar 27, 2018 ]
I already had this amp in the Jeep. During hurricane Harvey while trying to help some people I went into deep water and got a few inches of water in the floor boards where the amp was located. It of course did not like this. lol But I loved the amp and it pushed my s/o box perfectly so I am just getting one to replace it. [ LESLIE J  Jan 27, 2018 ]
cause the legend levi said it would work best with my existing setup [ Brian  Dec 29, 2017 ]
Good reviews and price [ SHAWN  Dec 22, 2017 ]
Good pairing with the Sound Ordnance bandbox 12 [ RODNEY  Dec 14, 2017 ]
Needed a more powerful amp for my subs, tom advised me to try this one [ Phillip  Dec 04, 2017 ]
A Crutchfield advisor recommended it for the JL Audio Stealthbox [ Matthew  Nov 09, 2017 ]
Doing the research I found the consensus was the combination of the Kicker sub I bought and this Sound Ordnance amp. Then talking with the Crutchfield support staff enabled me to make the choices I made with confidence. With Crutchfield doing all the leg work and testing there is no question that information you're being given can be taken to the bank. [ Gina  Sep 24, 2017 ]
recommended by staff [ Geoffrey  Sep 20, 2017 ]
It's a great little amp with serious power. The Houston flood of 2017 killed my S.O. 350. [ LEONARDS  Sep 17, 2017 ]
Bought this in 2010. It recently broke. [ Kevin  Aug 14, 2017 ]
I picked this amp because its made in the USA and is small and compact. I hope it performs as rated. It is small and compactand should fit nicely in the dash above my glove box were I plan on putting it. [ keith  Jul 29, 2017 ]
Smaller size and good reviews. [ Mike  Jul 07, 2017 ]
Gives just what I need for my daughters S/O sub , plus a little extra [ Joshua  May 15, 2017 ]
price / size / feature - remote gain control. replacement for another amp sold at Crutchfield that only lasted 2 years in a non-abusive application [ David  May 09, 2017 ]
I need a compact amp for my sub: this unit has more features and performance for the size and price. And it received many positive reviews. I'll be installing it under the driver's seat of a 1987 Suzuki Samurai. I will provide feedback after I install it. [ Vincent  Mar 08, 2017 ]
size. needed something that would fit my 2015 silverado double cab. With sub box its difficult to fit standard size amps behind the sub box and rear wall. [ christina  Jan 28, 2017 ]
Because you can't beat the warranty and the quality. THis littel amp pounds the single 12" S/O amp my son has. Sounds like 2 12s in there! [ LESLIE J  Dec 27, 2016 ]
Was looking for great mono power in a small package and an unbeatable price! [ Kris  Nov 08, 2016 ]
This is my 3rd S/O amp they are small and powerful easy to adjust and this one comes with a remote. [ John  Nov 03, 2016 ]
Class "D" performance in a small inexpensive package. [ M  Sep 30, 2016 ]
Larry helped to spec this out. It is a powerful amp that will run the sub perfectly and is very reasonably priced. Thanks Crutchfield! [ Jason  Sep 29, 2016 ]
Price and power rating. A lot of bang for the buck, I don't have a show car or system. I just want good solid sound at a decent price. [ GENE  Jul 11, 2016 ]
Had great reviews [ Abigail  Jul 07, 2016 ]
Based on the excellent advice of Chip, the advisor who guided my selection. Chip's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=210 [ LARRY  Jul 05, 2016 ]
Compact size and good reviews. [ lovethetwins  Jun 25, 2016 ]
it's a class d and has a cooling fan which I like. [ charles  Jun 22, 2016 ]
Size, size, size!!! I need something small but powerful to get more bass in my system. This will fit right where I want it to. I can't ask for more. Price and power were right at my level also. Good stuff. [ Michael  May 16, 2016 ]
Needed a mono block and for the brand new sub. [ A  Apr 24, 2016 ]
Get 50 extra amps for $30 less [ Ben  Apr 04, 2016 ]
This just seems like it will make a decent amplifier for my single 1262W infinity sub woofer. [ Samuel  Feb 18, 2016 ]

11 questions already asked

you do not hear it [ Perry  Apr 03, 2018 ]
Not even noticeable when you have music playing. Powered up with no music I would compare it to a CPU fan, maybe a bit louder, but nothing intrusive and it's certainly nothing worry about when considering the product unless you're sensitive to a fan humming. [ Kyle  Apr 03, 2018 ]
I have never heard the fan at all. I have it installed in the stock location of the 3000GT which is on a bracket underneath the front passenger seat. All of the material around it would deaden any noise it might create otherwise. [ David  Apr 03, 2018 ]
I don't even hear it and it's right behind my seat. [ THOMAS  Apr 03, 2018 ]
No you can't hear the fan. It's quiet [ Anthony  Apr 03, 2018 ]
It is very quiet it would ramp up if needed but it is quite [ Dan  Apr 03, 2018 ]
I've never heard the fan unless I put my ear right next to the amp. It's a pretty small fan too. [ Daniel  Apr 03, 2018 ]
I have never heard the cooling fan, if it has one. [ C Drake  Apr 03, 2018 ]
16ga is fine for up to 100watts and 2ohm X12FT(length of run) and 4ohm X24ft, in low voltage applications more wire strands is better, that is a wire with 40 strands is better than a wire with 20 strands. [ Anthony  Feb 19, 2018 ]
I'm using 16g speaker wire which may be overkill [ Michael  Feb 12, 2018 ]
The Sound Ordnance M350-1 uses set screw terminals for the power and ground connections which accommodate up to 8-gauge wire. I hope that helps! [ Larry  Feb 18, 2017 ]  Staff
Whichever channel you send from your head unit is the channel it will process. So for instance my head unit has a left right and sub RCA channel. I use the sub channel to this amp because it is powering my sub. Your head unit will have the Front channel, rear channel, and/or sub channel. If you only have front and rear, then use the rear channel and set your cross over appropriately and you'll be good to go. [ Wasey  Nov 07, 2016 ]
I would set the Kenwood to 0DB on that negative 15 to positive 15 adjustment then set your amplifier gains I believe that will give you the least distortion [ Dan  Aug 17, 2016 ]
Nope. It's optional. [ Anthony  Aug 18, 2016 ]
I don't believe you need to have the remote hooked up to use the amp you would just have to set the amplifier gain from wherever the amplifier is mounted instead of next to you or your seat. [ Dan  Aug 17, 2016 ]
No [ Charles  Aug 16, 2016 ]
I honestly can't say if it's required as I haven't run mine without it. I will say that I do use the remote more than I thought I would. Radio, satellite radio and streaming all have different audio levels, so as I change between them, I regularly adjust the remote to change the impact of the subwoofer. Sorry I couldn't answer your question directly. [ C Drake  Aug 16, 2016 ]
One [ SHANNON L  Aug 15, 2016 ]
You can run 2 subs but they together need to be compatible with the specs of this amp. So if you run two 4 ohm subs in series that'd give you your 2 ohms overall. Also the two subs could only be 175 watts rms max a piece (to accommodate the 350 watt output of the amp) [ Wasey  Aug 13, 2016 ]
One [ Thomas  Aug 13, 2016 ]
Thanks for your question. For information on selecting the best amp for your subs 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. [ Kenny  May 10, 2016 ]  Staff
Yes, with the gain set properly /lower. This is a good match. When selecting/matching speakers to amplifiers. You want to supply close to but not more than the the upper RMS rating of the speaker. For example a speaker with a operating range of 5-60watts RMS, you want to supply 45-60 watts for the best performance. [ Anthony  Apr 03, 2018 ]
The Sound Ordnance 350-1 says it puts out 290 watts @ 4 ohms so you're probably safe using it for your subwoofer. [ Daniel  Apr 25, 2016 ]
Per MTX's website, the TNE212D is rated to handle 400 watts RMS at 2-ohm so the Sound Ordnance M350-1 would be a better match to sufficiently drive those subs. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=159 [ Larry  Apr 19, 2016 ]  Staff
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