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Sound Ordnance M2-8SVC

8" 4-ohm subwoofer

37 Reviews | 3 questions - 11 answers


Our take on the Sound Ordnance M2-8SVC

Win the battle for boom with subwoofers from Sound Ordnance. Throw one or two of these bad boys in your vehicle to give you bass you can feel. You'll love the difference these subs make, and adding them to your system won't destroy your budget.

Add some boom to your ride

Win the battle for boom with subwoofers from Sound Ordnance. Throw one or two of these bad boys in your vehicle to give you bass you can feel. You'll love the difference these subs make, and adding them to your system won't destroy your budget.

Built like a tank

The M2-8SVC 8" subwoofer comes with a tough glass fiber cone that will keep its shape when the music's turned up, so your bass stays accurate. The butyl rubber surround helps keep the woofer's movement on track, and it'll stay pliable for years to come. The stamped steel basket provides a stable home for the whole assembly, so your bass plays the way it should. Also, Sound Ordnance backs up this sub with a 3-year warranty, giving you peace of mind while you're rocking hard. 

To drive this single subwoofer, we recommend a mono amplifier rated between 120 and 225 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Great sound good price

Anonymous, Orocovis, PR

What's in the Box:

  • One 8" Woofer
  • Rubber gasket/ concealing ring (installed)
  • Owner's manual
  • Warranty information

Product Highlights:

  • 8" 4-ohm subwoofer
  • glass fiber cone
  • butyl rubber surround
  • stamped steel basket
  • power range: 50-150 watts RMS
  • peak power handling: 300 watts
  • frequency response: 34-1500 Hz
  • sensitivity: 86.5 dB
  • top-mount depth: 4-1/16"
  • sealed box volume: 0.35-0.67 cubic feet
  • ported box volume: 0.53-1.06 cubic feet
  • warranty: 3 years
  • Our 60-day money-back guarantee

Sound Ordnance M2-8SVC Reviews

Average Customer Review(s):

(37 Reviews)
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Hands-on research

Product Research


Glass Fiber Cone: The cone is glass fiber, a rigid, yet light weight material that minimizes cone flex, resulting in low distortion and improved clarity.

Butyl Surround: The surround is butyl rubber to promote long life and durability.

Binding Posts: The 5-way binding post speaker terminals will accept spade connectors, single or dual banana plugs, pin connectors, or bare wire up to 10 gauge.

Concealing Ring: The woofer includes a removable, rubber gasket/concealing ring used to hide the woofer's mounting screws for a neat and professional looking installation.

Sealed Box Volume: The recommended sealed box volume is 0.53 ft³ (from 0.35 ft³ to 0.67 ft³ is acceptable).

Vented Box Volume: The recommended vented box volume is 0.78 ft³ with a 3" diameter x 11.4" long port (0.53 ft³ to 1.06 ft³ is acceptable).

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?

Good reviews, fit my application with no modification, good performance at a great price. [ Kevin W  Jun 09, 2017 ]
Value ð??? for those of us who just need a little extra bass. [ Jonathan  May 07, 2017 ]
Price was very reasonable. I just need to fill out the low side to balance the system and you can't beat the price. The reviews were also very good. [ James  Apr 09, 2017 ]
already have one and it works great, I bought a dual 8" enclosure so i wanted the same sub [ William  Mar 31, 2017 ]
Value [ Dan  Mar 28, 2017 ]
You can't beat the price. Subwoofers don't have to be crystal clear, they just have to move air. [ ROSS  Mar 08, 2017 ]
price and reviews. I am also limited on space for the box it will go in. I have a full size extended cab truck but ABSOLUTELY DO NOT want to use up all the space for just a speaker box. This will replace the VERY old and wore out 12 in. R.F. Since I have had great success with Rockford Fos. I was going to purchase another, but I think this speaker will be a great replacement and for an UNBEATABLE price !! Look forward to using it ! [ kenneth  Mar 01, 2017 ]
Price point and quality [ MICHAEL B.  Feb 28, 2017 ]
price was right and sub was small for the installation i have. [ David  Feb 21, 2017 ]
Great reviews and price. [ James  Feb 08, 2017 ]
I chose to try one of these speakers to replace our blown out OE one, mainly because of the great reviews on it. Awesome price too... [ Jim  Feb 04, 2017 ]
Great product reviews, cant go wrong for stock part replacement. Price and free shipping best in the industry! [ Kent  Jan 22, 2017 ]
to put into a BMW Z3 [ Skip  Jan 11, 2017 ]
Choose these subs with reviews just looking to add low end base to system and hey you can not beat the warranty on these. [ L  Dec 31, 2016 ]
These seemed like the best bang for the buck when upgrading the system in my daughters truck. [ Doug  Dec 06, 2016 ]
To replace speaker on Polk psw120 subwoofer. [ Keith  Nov 13, 2016 ]
Based on ratings and warranty [ Kevin  Oct 24, 2016 ]
Because Sound ordinance a really good sounding, high quality product. [ Steve  Oct 08, 2016 ]
Low cost, dB range and and low HZ [ George  Sep 28, 2016 ]
Price and good reviews [ Ricardo  Sep 19, 2016 ]
Good reviews, price [ Timothy  Sep 07, 2016 ]
As a replacement subwoofer, tube that I have had for like 10 years and it starting sounding so bad. Turns out it was blown. [ Steve  Sep 04, 2016 ]
The Reviews and the price [ John  May 30, 2016 ]
I choose this from the reviews I've read and plus I have 3 1/2 sound ordnance speaker's in the front and they sound great. So I'll give these a try,in which I'm sure I'll be happily suprised! [ andre  May 24, 2016 ]
This subwoofer appears to be the right size for a direct replacement for the factory subwoofer that came in my 2004 Toyota Sienna. [ MIKE  May 16, 2016 ]
size and price [ John  Jan 10, 2016 ]

3 questions already asked

no grill needs to be purchased seperate [ MARTIN  Dec 17, 2016 ]
No it does not [ John  Dec 16, 2016 ]
no grill [ james  Dec 16, 2016 ]
No it does not,its just the speaker and a rubber seal [ Edward  Dec 16, 2016 ]
No [ james  Aug 04, 2015 ]
THis was not an issue for me. I actually stripped the connections off to expose the wires, because it has a positive and negative. It sounds good in my 02 Tahoe [ DEMARLON  Aug 04, 2015 ]
I had no issue when I replace the Sub in our 2002 Avalon XL, just make sure you get the wires connected properly to match the impedance or the other speakers. It will work either way but will sound better if all are in sync. You will be able to tell by listening, if it does not sound correct just reverse the wires. [ Roger  Aug 03, 2015 ]
If you are saying your vehicle has two wires connected to the current subwoofer, then this unit will work fine. If your vehicle has 4 wires connected to the existing subwoofer then you have a Dual Voice Coil setup. Most aftermarket amplifiers will allow you to bridge the two outputs into one (two wires) for a SVC speaker. Some OEM radios will allow you to just connect one pair of speaker leads. If you have a DVC setup (4 wires) currently, you can find nice DVC subwoofers on the Crutchfield site. [ William  Aug 03, 2015 ]
NO this will not be a issue [ Anthony  Aug 03, 2015 ]
Mitch, I replaced the factory sub in a 1998 Ford Expedition. The factor amp was existing and I would assume the crossover was built into the amp. I would say yes you would. Good luck. [ TIMOTHY J  Mar 19, 2014 ]
I didn't I just hooked it up to my stock stereo in my Chrysler 300 class c and it sounds great! [ DEAN  Mar 18, 2014 ]