SKU: 3512-04S
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12" 300-Watt RMS 4Ω Car Audio Shallow Subwoofer

Availability: In stock
$159.95 MSRP

Extra Space Bass

The 35 Series shallow subwoofers utilize technologies found in other MTX subwoofers to deliver exceptional bass in a variety of applications. Its shallow mount design make it perfect for tight spaces where you still need bass.

The 3512-04S is a 12" single voice coil, 4Ω, 300-watt shallow mount Car Audio Subwoofer designed to deliver outstanding SPL and sound quality in an affordable combination of state-of-the-art MTX technologies.

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3512-04S Subwoofer

More Than You Expect

The 3512-04S is the ideal subwoofer for audio enthusiasts that don't want to sacrifice space in their vehicle, but still want their sound to bump. Designed for sealed enclosures, this subwoofer is perfectly deployed in pick up trucks, sports cars, or any daily driver that has a trunk full of life's stuff. A great value, this subwoofer continues the MTX tradition of getting More Than Xpected.

3512-04S Subwoofer

The MTX Inverted Apex Surround

This subwoofer features a new Inverted Apex surround that increases surface area allowing for more air movement and higher SPL, and a progressive suspension that lowers distortion resulting in improvLow profileed sound quality. This subwoofer also incorporates Spider Plateau Venting which is a mechanical cooling process that targets cool air at the voice coil effectively managing the temperature for long term performance.

3512-04S Subwoofer

Great For Upgrades

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.

Subwoofer Wiring Calculator

Learn how to properly wire your subwoofers with this easy subwoofer wiring diagram tool.

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Dimensions & Details


  • A - Total Diameter:       12.30" (312.60mm)
  • B - Driver Diameter:     10.64" (270.3mm)
  • C - Total Depth:             3.78" (96.10mm)
  • D - Mounting Depth:    3.38" (85.70mm)
  • E - Cut Out Diameter:    11.13" (282.60mm)

What's in the Box

  • Subwoofer
  • Technical Data Sheet


  • Recommended Amp Power (RMS): 150 - 300
  • Frequency Response: 23Hz - 130Hz
  • Impedance:
  • Sensitivity: 84.4db (1W/1m)
  • Voice Coil: 2" (5.08 cm)
  • Magnet Weight: 44 oz
  • Mounting Depth: 3.375" (8.57cm)
  • Cut Out Diameter: 11.125" (28.26cm)
  • Volume Displacement (cu in): 35.74 cu in
  • Sealed Enclosure Net Volume: .8 cu ft
  • Warranty Period: 24 months from date of purchase


Returns & Warranty

30-Day Money-Back Guarantee

At MTX Audio, we are serious about sound®. Therefore, if you are not "blown away" with your purchase, for any reason, you can return any items purchased directly from that are complete and like new within 30 days. Products purchased from authorized MTX retailers must be returned through that same retailer. Products purchased through non-authorized MTX retailers may not be returned.

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Warranty Information

MTX products purchased in the USA from an authorized MTX dealer are guaranteed against defects in material and workmanship for the period of time specified below, the warranty period begins the day the product is purchased by the end user. This warranty is limited to the original retail purchaser of product and extends only to products purchased from authorized MTX resellers. Product found to be defective during that period will be repaired or replaced by MTX at no charge.

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