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Sound Ordnance M100-2

Compact 2-channel car amplifier — 110 watts RMS x 2

23 Reviews | 3 questions - 9 answers


Our take on the Sound Ordnance M100-2

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 M100-2 2-channel amplifier can provide 110 watts RMS to each channel — more than enough power to overcome all the sonic enemies of clean, loud music.

Give your music 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 M100-2 2-channel amplifier can provide 110 watts RMS to each channel — more than enough power to overcome all the sonic enemies of clean, loud music.


You can bridge the M100-2 for 1-channel operation to run a subwoofer with 200 watts RMS. A low-pass filter and adjustable bass boost allow you to control the bass tone at will. For your full-range speakers, an adjustable high-pass filter makes sure they operate within their optimum range and give you the best tone possible.

Rugged and compact

This amp's tiny size lets you fit it 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 M100-2 100W x 2 Car Amplifier

This compact amp gives you all the controls you need to maximize performance in your system.

Product Highlights:

  • 2-channel car amplifier
  • 110 watts RMS x 2 at 4 ohms (140 watts RMS x 2 at 2 ohms)
  • 200 watts RMS x 1 bridged at 4 ohms (4-ohm stable bridged)
  • Class D amp technology
  • variable high- and low-pass filters (50-750 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • preamp inputs
  • cooling fan
  • fuse rating: 40A x 1
  • 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:

  • 2-Channel amplifier
  • 40-amp ATO blade fuse (installed)
  • 3mm Allen wrench
  • Four 3/8" Self-tapping screws
  • 4 Split lock washers
  • 4 Flat washers
  • Owner's Manual

Sound Ordnance M100-2 Reviews

Average Customer Review(s):

(23 Reviews)
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Hands-on research

Product Research



Power Ratings: The Sound Ordnance M100-2 is a 2-channel Class D amplifier with an RMS power rating of 110 watts per channel into 4 ohms, and 140 watts per channel into 2 ohms. The amp can also be bridged into a 4-ohm load for a power rating of 200 watts (x 1). Power ratings are measured with an input power of 13.6 volts.

Crossovers: The built-in crossover can be set to high-pass, low-pass, or full range. The crossover point is continuously variable from 50 to 750 Hz and the slope is 12dB per octave.

Bass Boost: The Bass EQ (bass boost) is continuously variable from 0 to +12 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.


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 3mm Allen wrench is required to tighten/loosen the terminals (included).

Speaker Connections: The speaker terminal can be removed from the amp, which makes connecting the speaker wires easier. The terminal is mounted to the chassis of the amp with two screws. Bare speaker wire, up to 12-gauge, is held in place by screw-clamps on the terminal. A flat blade screwdriver (not supplied) is required to tighten/loosen the screw-clamps.

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

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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

The power and 3-year warranty. [ Dakota  May 21, 2018 ]
Just what I was looking for. [ Guest  May 19, 2018 ]
Advised by sale representitive [ CW  Apr 07, 2018 ]
compact design .. great sound .. low battery draw ( i use it on all my motorcycles) [ tyrone  Feb 02, 2018 ]
Small size and reasonable price for the power output. [ Matt  Dec 17, 2017 ]
to power underseat subwoofers in Mini Cooper Countryman after being sent through sound processor. [ Lou  Nov 21, 2017 ]
It is just what I am looking for!! Install on my Harley touring bike. Small size and 2 ohm. [ MARK  Jul 13, 2017 ]
Price/power. Very affordable for the power. I checked out a lot of reviews before purchasing this amp. [ Nathan  Apr 04, 2017 ]
Compact size for small space. [ Allan  Mar 19, 2017 ]
Need to put power to those pioneer front speakers. Must have power!!! [ Keith  Mar 16, 2017 ]
Has the power I need in a small footprint to fit in a miata [ Christopher  Mar 11, 2017 ]
Its a decent amp if you just need a two channel [ Trevor  Feb 09, 2017 ]
Parker said to [ J  Feb 02, 2017 ]
it was recommended by Jenny as the right choice to pump up my front door kicker speakers [ manuel  Jan 30, 2017 ]
ease of installation [ Joseph A.  Jan 12, 2017 ]
Best value for what I needed :) [ James  Dec 28, 2016 ]
Because of it's compact size and because it is fan cooled. [ David  Dec 26, 2016 ]
Reviews and research [ JOHN E  Dec 12, 2016 ]
For my 15" sub I've had for age's to get the bass I want! [ Shane  Nov 21, 2016 ]
Compact size to power ratio. My Phoenix Gold M1000 is too big. [ Nik  Nov 17, 2016 ]
To power my rear deck 6x9s [ Patrick  Oct 25, 2016 ]
Based on ratings and warranty [ Kevin  Oct 24, 2016 ]
Thought I needed a 2 channel amp, but found out it wasn't enough [ Bennett  Sep 27, 2016 ]
It has the best price and perfect reviews. I am pairing this with the Kicker 40CSS684 set of 6x8 speakers, each rated at 75w RMS. Using crutchfield's advised method of choosing an amp (taking the RMS of speaker x 0.75 x 1.5) that comes out to an amp that can push out over 85 watts. Kickers are also able to handle quite a bit more than advertised, so this 110 watt amp is absolutely perfect to use with a pair of 75w RMS speakers. [ Billy  Sep 13, 2016 ]
best amp for the money and small footprint [ BRYAN  Aug 22, 2016 ]
Read an article on here about a guy with a convertible looking for a decent amp. I haven't bought an amp since 1977,and funny enough it was for a corvair as well., Jenny seems quite knowledgeable with setting up systems. I haven't bought all she suggested, yet..... budget [ Kurt  Jul 22, 2016 ]
Crutchfield has the best prices and customer service hands down!!!! [ David  Jun 15, 2016 ]
small space replacing factory amp [ Kenneth  May 02, 2016 ]
Sales rep helped pick this amp after seeing the speakers I chose [ Timothy  Mar 09, 2016 ]
Patrick helped me pick these out. If there house brand is as good as their customer service then I'm sure that i will be more than happy with this! Patrick's Bio: [ Steven  Mar 02, 2016 ]

3 questions already asked

I have been running a pair of 6x9s off of this and I would think it'll run 4 6 1/2. compare the RMS rating though. ideally the total of the speakers should be lower than the output of the amp. [ Ethan Wendell  Mar 29, 2018 ]
Good question. I believe so. My application was a bit different. I used this amp in my z3 for the subwoofer. I bridged the amp to provide the power. I used another compact amp (4 channel) to provide power a set of component speaker in the footwell & door(6 1/2) and a set of 4in speakers behind the seats. This part of my install seems closer to your scenario. I used 2 channels to power the component speakers. The lead from the amp went to the crossovers first and the crossovers distributed the power. The remaining two channels powered the rear speakers. I used the gain knobs to set the balance and power levels. Hope this helps. [ jason  Mar 28, 2018 ]
Yes [ Conner  Jul 20, 2017 ]
Yeup [ Mike  Jul 20, 2017 ]
Yes you can use this amp..don't be fooled by the little size of packs a punch....I have the same one,,and I am impressed [ Pete  Jul 20, 2017 ]
Hi, I have a 2001 BMW z3 roadster and use this amp to power the subwoofer only. I used the Alpine KTP-445U Power Pack to power the front component speakers w/ crossovers and 4inch rear speakers. A Kenwood head unit was also used. This works for my application. Hope this helps. [ jason  Jul 20, 2017 ]
Absolutely, I have this running my Polk audio components and it is more than enough power, reliable clean power. [ David  Jul 20, 2017 ]
I think that this amp will work fine for you. It does not draw too much power . If you use the right installation kit with the right gauge wire, you should be just fine. [ CHRIS  Jul 06, 2017 ]
I installed this Amp with head unit and P P [ Larry  Jul 01, 2017 ]