About the MTX 3512-04
Another strong member of the family
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 a 2-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.
Product highlights:
- 12" 4-ohm subwoofer
- polypropylene 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: 2 years
- Our 60-day money-back guarantee
- MFR # 3512-04
What's in the box:
- One 12" Single voice coil subwoofer
- Specifications
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More details on the MTX 3512-04

Features & specs
Size | 12 -inch | |
Impedance | 4 ohms | |
Cone Material | Polypropylene | |
Surround Material | Rubber | |
Ideal Sealed Box Volume (cubic feet) | 1 | |
Ideal Ported Box Volume (cubic feet) | 2.32 | |
Port diameter (inches) | N/A | |
Port length (inches) | N/A | |
Free-Air | No | |
Dual Voice Coil | No | |
Sensitivity |
89.7 dB at 2.83 volts 86.06 dB at 1 watt | |
Frequency Response | 28 - 130 Hz | |
Max RMS Power Handling | 250 | |
Peak Power Handling (Watts) | 500 | |
Top Mount Depth (inches) | 5 1/4 | |
Bottom Mount Depth (inches) | N/A | |
Cutout Diameter or Length (inches) | 11 1/16 | |
Vas (liters) | 73.1 | |
Fs (Hz) | 31.4 | |
Qts | 0.697 | |
Xmax (millimeters) | 8.128 | |
Parts Warranty | 2 Years | |
Labor Warranty | 2 Years |
Product Research
Features
Enclosure Compatibility
Features
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.
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