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MTX 3512-04

500W Peak (250W RMS) 12" 35 Series Single 4-ohm Car Subwoofer

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• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5.313"
• Sensitivity: 86 dB

Learn more about the mtx-351204
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$129.95

 with warranty
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Current Promotions (1 offer)


Get a Free roll of Belva 16 Gauge Speaker Wire. Simply click the "Add Both to Cart" button and you will see your savings at checkout. This offer cannot be combined with any other coupons or offers.

MTX 3512-04

100% off


Priced separately $142 94

Promo Savings of $12 99

Total price:

$129 95

Product Highlights


• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5.313"
• Sensitivity: 86 dB

Description


MTX brand icon

Authorized dealer


3512-04

The 3512-04 is a 12" single voice coil, 4 ohm, 250 watt Car Audio Subwoofer designed to deliver outstanding SPL and sound quality in an affordable combination of state-of-the-art MTX sub features...and it rocks.

This subwoofer features the MTX Inverted Apex Surround. This is a departure from a traditional half roll surround. The Inverted Apex is narrower thereby increasing the surface diameter of the subwoofer cone enabling it to displace more air and generate higher SPL. The 55's are designed with a progressive suspension that lowers distortion resulting in improved sound quality even at high volume. 35 Series subwoofers are ideal for improving the sound in any vehicle. Their low profile does not require a large enclosure so they are perfect for most vehicles.


Product Details:

  • 12" Single 4 ohm 35 Series Subwoofer
  • Power Handling:
    • Peak: 500 watts
    • RMS: 250 watts
  • Polypropylene Cone
  • Rubber Surround
  • Inverted apex surround for more air and higher SPL
  • Plateau venting for mechanical cooling process
  • 1.75" High Temperature Voice coil
  • 8.128 mm Xmax
  • 56 oz. Single Stacked magnet motor structure
  • Frequency Response: 28 - 130 Hz
  • Resonance Frequency (Fs): 31.4 Hz
  • Sensitivity: 86 dB
  • Recommended sealed box volume: 1.0 cubic feet
  • Recommended ported box volume: 2.32 cubic feet
  • Top-mount depth: 5.313"
  • Cutout diameter: 11.125"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

PDF IconMTX MTX-351204 owner’s manual

Product history:

MTX 3512-04S thumbnail
(newest, current model)
MTX 3512-04 thumbnail
(previous model, replaced by MTX 3512-04S)

Subwoofer Wiring Guide


Wiring Guide to Wire 1 MTX 3512-04 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 MTX 3512-04 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 MTX 3512-04 Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 MTX 3512-04 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


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Specifications & Details


Subwoofer Specifications
Series
35 Series
Subwoofer Size
12"
Peak Power Handling
500 watts
RMS Power Handling
250 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohm
Voice Coil Diameter
1.75"
Frequency Response
28 - 130 Hz
Sensitivity
86 dB
Xmax (millimeters)
8.128 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Polypropylene
Woofer Surround
Rubber
Magnet Structure
Single Stacked
Magnet weight
56 oz.
Subwoofer Grille
No
Re-Cone Kit Available
No
CTA-2031 Compliant
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Optimum Sealed Box Volume
1.0 cubic feet
Optimum Ported Box Volume
2.32 cubic feet
Top-Mount Depth (Mounting Depth)
5.313"
Cutout Diameter
11.125"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
31.4 Hz
Equivalent Compliance (Vas)
73.1 liters
Total Speaker Q Value (Qts)
0.697
Electrical Q Value (Qes)
0.893
Electrical Resistance of Voice Coil (Re)
3.5 ohm
Mechanical Q Value (Qms)
3.173
What is in the box?
Paperwork
User manual
WITB: Subwoofers
Subwoofer
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

MTX

Model Number:

3512-04

Weight:

9.50lbs

Internal SKU:

mtx-351204

Internal Product ID:

68894

Product and How-to Videos


Customer Ratings & Reviews


MTX 3512-04 thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
4.5
Features
5
Design
5
Usability
5

Customer Reviews

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Well made

Put 2 of these in a slim box in an 05 Ram 1500 standard cab powered by an Alpine PDX-V9 and they sound great. I almost always look at reviews first but at the time there were none for this specific model, and still aren't. Sonic got them to me fast! Build quality was very nice. Stamped steel baskets and heavy duty connecting posts made wiring a snap.

Something worth noting on this specific model is that the cutout is a little oversized so for a pre-made box you might have to trim a little for fitment.

I have used MTX drivers,mids, and subs many times over the last 20 years and have never been disappointed. This is no exception to that. They do not hit the really low frequencies but I suspect that is more of a box fail than a speaker issue. It is a slim mount after all too.

If I had it to buy again would I buy the same ones? Yes, I would.

By Clarence on January 5, 2015

44 found this helpful


Just the box

The sub itself was in perfect condition. I can't say that it would be the same case for all but this one was perfect.

By Jimmie on April 3, 2022 Checkmark Icon Verified purchase

23 found this helpful


By Michael on April 7, 2025 Checkmark Icon Verified purchase




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