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MTX 3512-04

35 Series 12" 4-ohm subwoofer

Item #: 236351204

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Another strong member of the family          

MTX's 35 Series subs prove once again that you can pack a lot of technology into an affordable subwoofer. This 3512-04 12” 4-ohm sub shows off many of the features that MTX originally developed for their top-of-the-line subs. That means you get a sub that performs the way you want, delivering great low-end bump with impressive accuracy. And MTX protects this sub with their unique 5-year warranty.

The heart of the matter

The Inverted Apex Surround increases the cone's surface area for better volume displacement and a higher SPL. This sub's sophisticated suspension system offers better control over cone movement for more refined bass. MTX's venting system keeps the voice coil cooler for optimum performance over the long haul. Put this 4-ohm model in a sealed or ported enclosure, power it with a nice amp, and you've just created a cost-effective recipe for adding a solid kick to your music.

To drive this single subwoofer, we recommend a mono amplifier rated between 200 and 375 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 12" 4-ohm subwoofer
  • polypropylene woofer cone with nitrile-butyl rubber surround
  • power range: 125-250 watts RMS (500 watts peak power)
  • frequency response: 28-130 Hz
  • sensitivity: 86.06 dB
  • top-mount depth: 5-1/4"
  • sealed box volume: 1.00 cubic feet
  • ported box volume: 2.32 cubic feet
  • warranty: 5 years (free repair or replacement for 2 years; prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

MTX 3512-04 Reviews

Average Customer Review:

2 Reviews

Only a slight uprgrade from a shallow mount 10 inch sub.

Written by: Jake from Ohio on December 8, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

I upgraded to this sub from a 10 inch pioneer shallow mount sub. I used a 300 watt RMS amp to power the pioneer so I decided I could use the same amp for this sub After installed in my 1995 chevy s10 ext cab I was impressed with how hard this sub hits. This sub also has good mid-to-high bass, but lacks in low bass. To me it seems as if my 10 inch shallow mount had the same if not better low bass that this 12 inch sub. I built both boxes from scratch to recommended cubic feet. This sub also gets warm after about 5 minutes of use whereas my 10 inch almost never got hot.

Pros: Cheap,good mid to high bass notes, looks great.

Cons: bad lows, Gets warm quickly

03 Silverado

Written by: Justin from Louisa VA on September 23, 2013

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

This MTX sub sounds great in a Silverado ext cab truck when used with a down fire sealed box with the correct air space. This sub is a great value.

Pros: Price, Air Space, and Sound

Cons: Would like to see mounting hardware for sub.

Hands-on research

What's in the box?

Download owner's manual

  • One 12" Single voice coil subwoofer
  • Specifications

Product Research

Enclosure Compatibility


Terminals: The woofer features heavy-duty spring post terminals which can accept single or dual (standard 3/4" width) banana plugs, pin connectors, or bare wire up to 10-gauge.

Inverted Apex Surround: The new Inverted Apex surround allows increased cone surface area, creating more air movement and higher SPL.

Progressive Suspension: The progressive suspension controls excursion at high power, thus reducing distortion and improving sound quality.

Spider Plateau Venting: Heat from the voice coil is vented through vents that surround the back of the spider. As the woofer travels back and forth, cool air is pulled in and heated air is pushed out.

Enclosure Compatibility

Sealed Box: For the best possible sound quality where space is a premium MTX recommends a sealed enclosure with an internal volume of 1.0 ft³. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Vented Box: The recommended vented box has a net internal volume of 2.32 ft³ with a slot port 13-3/4" x 2-1/2" x 26-1/4". Vented (or ported) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power.


5 Year Warranty Terms: This product carries a 5-Year Prorated Warranty with the following terms:

  • Years 1-2: Products found to be defective in materials or workmanship during the first two years will be, at Mitek's option, repaired or replaced by Mitek at no charge. The warranty period does not renew, but continues on from the original date of purchase.
  • Years 3-5: The purchase price of an item which becomes defective after the first two years and prior to the end of the warranty period will be prorated and credited toward the purchase of a new MTX product. The amount of proration is determined by dividing the original purchase price by the number of months in the warranty period (60), then multiplying the result by the number of months remaining in the warranty period.

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.

Customer Q&A