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Sound Ordnance M350-1

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

Item # 777M3501

Your vehicle's interior is like an audio battlefield with your music fighting to get heard over the noises of the...

Find what Fits your car

Your vehicle's interior is like an audio battlefield with your music fighting to get heard over the noises of the...

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In stock
$129.99

About the Sound Ordnance M350-1

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.

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.

READ LESS

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
  • MFR # M350-1

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

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Sound Ordnance M350-1 reviews

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More details on the Sound Ordnance M350-1

Mark G.

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)

Fan Cooled: A thermally-activated fan on the bottom of the amp helps cool the internal components.

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.

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Customer Q&A

20 questions already asked

Q
Will this work with the b- 24 sub box?
[ henry  Oct 22, 2020 ]
2 answers
A
The B-24 documentation recommends 100-500W RMS at 4ohms. This amp providers 290W at 4ohms, so it should work.
[ Timothy Carroll  Oct 22, 2020 ]
A
Yes, my son loves it.
[ George T.  Oct 22, 2020 ]
Q
Why is this only rated @ 350 with 2x30 amp fuses? Shouldn't this amp be more around 500 watts??
[ jay  Jul 21, 2020 ]
4 answers
A
Even though i dont think its listed most companies double the output power for peak so this would be 350w rms and 700w peak at 2ohms. When measuring for a fuse you have to factor in the most power a product will be able to pull. In this case 700w divided by 14.4v would give you roughly 48.61amps plus some for crossover n preamp. Hope this helps.
[ Bryan  Aug 10, 2020 ]
A
Hi Jay. I own this amp and it works awesome running a single 10" sub. With electricity, watts are determined by the amps and volts, not the other way around. The two fuses is for redundancy purposes so I will explain the math using one 30 amp fuse. Amps x volts = watts. In this case, 30 amp fuse x 12 volts = 360 watts. That means it is fused to match the amperage rating of 350 watts at one channel. Hope this helps you.
[ JUSTIN  Aug 05, 2020 ]
A
Jay J...forgot to add that was a PUNCH 12 P2. older model
[ Lance  Aug 05, 2020 ]
A
Jay J...you would be correct in that thinking if you did the math. 60A X 14.4V = 864 watts at 100% efficiency, but I think the avg is 80% so even at that math it would be rated at 691 watts. Im not sure if it is putting out over 600 watts at 1 ohms, but I know it is putting out more than 400 watts, as I killed a Rockford P2 dual 4 ohms on it. and the gains were set using a SMD DD1+ and crossover set with CC1+.
[ Lance  Aug 05, 2020 ]
Q
how would remote turn on work with this amp?
[ Sean  Jul 03, 2020 ]
3 answers
A
The remote turn on needs to b connected to a switched 12v wire for it to turn on. If you have an aftermarket radio there is a blue wire for this reason. If its factory radio you can easily find a wire in the car that turns on and off when the key is turned to accessory.
[ Bryan  Jul 05, 2020 ]
A
If you're referring to the remote line, it hooks up like any other amp
[ Cody  Jul 03, 2020 ]
A
Have to run remote wire from amp to head unit and connect to head unit remote wire. Usually blue. If connecting to factory radio you need to get a high/low adapter with a trigger to power amp
[ Michael  Jul 03, 2020 ]
Q
What is the distortion percentage on this amp?
[ Chase  May 12, 2020 ]
1 answer
A
Total harmonic distortion is 0.05%.
[ Bryan  May 13, 2020 ]
Q
Will this amp work as a replacement for my 03 mustang gt so I will be able to use aftermarket front door speakers?
[ Kyle  Apr 08, 2020 ]
2 answers
A
This is a mono-amp, meaning 1 channel. If you are talking about a Left / Right speaker setup, this would only produce sound for one channel. Typically this would be used for subwoofers either by a Sub out from the head unit or splicing into the Right and Left channel and plugging that into the amp, the output would be 1 channel.
[ Michael  Apr 20, 2020 ]
A
No this is a single channel sub woofer amp. You need a 2 or 4 channel amp
[ Michael  Apr 20, 2020 ]
Q
With the amp having only one set of outputs, how would you bridge to get 4 ohms?
[ Jim Jim  Oct 28, 2019 ]
1 answer
A
You can not bridge that amp. The subwoofer(s) will dictate the impedance. You will either need to connect a single voice coil 4 ohm sub or something you can wire in series to 4 ohms. You can find a good chart in this article about all the different subwoofer impedance combinations: https://www.crutchfield.com/I-rET1c290/learn/how-to-match-subwoofers-and-amplifiers.html
[ Cosmo  Nov 11, 2019 ]  Staff
Q
With the amp having only one set of outputs, how would you bridge to get 4 ohms?
[ Jim Jim  Oct 28, 2019 ]
3 answers
A
I do not know of a way to bridged this amp into 4 ohms load. You could however connect a 4ohm sub but the output will only be 290 W. You will get 350 W with a 2 ohm sub!
[ Jorge  Nov 08, 2019 ]
A
The amp doesn't 'bridge' An amplifier outputs power based on the impedance ( or resistive load) presented to it. If you put a 2-ohm load on the amp, you can get 350 watts RMS, if you put a 4-ohm load on the amp you can get 290 watts RMS from the amp. To get 4-ohm power ratings, you need a 4 ohm sub.
[ Calvin  Nov 08, 2019 ]  Staff
A
The beat I figure is that the amp switches to 4ohms from internal circuitry. I have a sub with the capability of switching between either 2 or 4 ohms. The change in load requirements should make the amp switch to the proper impedance.
[ ORELVIS  Nov 07, 2019 ]
Q
I already own this amp paired with the B-17 sub, my question is can I get the exact same amp/sub setup and daisy chain the amps together to push each B-17? Thanks!
[ Walter  Mar 10, 2019 ]
3 answers
A
But you can power a second b-17 if you wanted to or have the room for it
[ Bryan  May 13, 2020 ]
A
I am by no means an audio installer or genius. But my first guess would be to say absolutely no. Using two amps to power one speaker either in series or parallel is a big no no.
[ MICHAEL  Mar 19, 2019 ]
A
I have 2 m-350's pushing 2 seperate subs but they are not chained together as there is no master/slave switch and there is no hole for RCA out. You will not be able to "daisy chain" the amps but you can still happily pick up the same amp and sub and wire it into the system, the only thing to make sure of is that you upgrade the fuse on the positive connections feeding the system, your battery will experience more amperage draw due to having a second amp and could heat the wire to a destructive level if it is too skinny or too short to handle the extra current your drawing. Best of luck! If i havent answered your question properly and you are still unsure of yourself cruthfeild will most likley contact you soon regarding my failed attempts :)
[ ANTHONY  Mar 19, 2019 ]
Q
How loud is the cooling fan?
[ B  Mar 24, 2018 ]
4 answers
A
you do not hear it
[ Perry  Apr 03, 2018 ]
A
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 ]
A
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 ]
A
I don't even hear it and it's right behind my seat.
[ THOMAS  Apr 03, 2018 ]
Q
How loud is the cooling fan? Can you hear it when the music is on mute?
[ B  Mar 23, 2018 ]
4 answers
A
No you can't hear the fan. It's quiet
[ Anthony  Apr 03, 2018 ]
A
It is very quiet it would ramp up if needed but it is quite
[ Dan  Apr 03, 2018 ]
A
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 ]
A
I have never heard the cooling fan, if it has one.
[ Drake  Apr 03, 2018 ]
Q
What gauge wire would you recommend for running from the amp to the speaker?
[ tomdjr  Feb 11, 2018 ]
2 answers
A
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 ]
A
I'm using 16g speaker wire which may be overkill
[ Michael  Feb 12, 2018 ]
Q
What is the max gauge power wire this will accept?
[ Donny  Feb 06, 2017 ]
1 answer
A
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
Q
Does the amp use the L or R input RCA to transmit to the sub? I dont want to wire both channels.. whats the mono channel? normally its left.
[ scpy15  Nov 07, 2016 ]
1 answer
A
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 ]
Q
Where/how would you set the INPUT LEVEL on the amp when the receiver (KDC-X799) has its own level adjustment (-15/+15)?
[ Mustang  Aug 15, 2016 ]
2 answers
A
Agreed with setting the sub out to zero but make sure all settings are set to zero or flat before setting the gains on any amplifiers. That includes any bass,treble,equalizer, and even level out settings. Once the gain/s are set then you can do your adjustments.
[ Bryan  May 13, 2020 ]
A
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 ]
Q
Is the remote required for operation?
[ Mustang  Aug 15, 2016 ]
4 answers
A
Nope. It's optional.
[ Anthony  Aug 18, 2016 ]
A
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 ]
A
No
[ Charles  Aug 16, 2016 ]
A
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.
[ Drake  Aug 16, 2016 ]
Q
Is this designed for 1 sub or two?
[ CHad  Aug 13, 2016 ]
3 answers
A
One
[ SHANNON L  Aug 15, 2016 ]
A
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 ]
A
One
[ Thomas  Aug 13, 2016 ]
Q
Is this amp a good match for a 30 watt, 8 ohm sub?
[ Maria  May 08, 2016 ]
2 answers
A
It can be used to run a 30w 8ohm sub. Two ways to do it the first being doing it by ear. Basically listening for distortion. The second is using a multimeter which if you dont have one can be picked up for a low price. There are a ton of vids on youtube on how to do this but looking for a output voltage of 15.49v from the speaker outs.
[ Bryan  Jul 05, 2020 ]
A
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
Q
Would this amplifier be too much power for a JL Audio 8" W3V3-4 if the gain was set properly? JL Audio recommends 250 watts or less RMS for that driver but the options are limited to either 150 watts RMS or over 250 watts RMS at 4 ohm's and these are all rated at 14.4 volts and most charging systems are 13.8 volts so 14.4 is unrealistic. I have 160 watts RMS now and feel I need at least 200 watts RMS. Price, size, and power consumption is a consideration.
[ John C  Apr 25, 2016 ]
2 answers
A
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 ]
A
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 ]
Q
Which amp would be a good match for the MTX Terminator TNE212D ?
[ Brian  Apr 16, 2016 ]
1 answer
A
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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