MTX JackHammer Series subwoofers offer the deep, powerful bass output found in competition subs, at a price that won't shake your wallet.

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MTX JackHammer Series subwoofers offer the deep, powerful bass output found in competition subs, at a price that won't shake your wallet.

The JH5512-04 12" subwoofer sports a rubber surround that's stitched directly to the polypropylene cone for extra strength, then rolled to maximize cone excursion so this sub'll move some air. The high-temperature copper voice coil lets this Jackhammer sub deliver powerful bass with smooth, piston-like precision.

MTX's patented Spider Plateau Venting keep the inner works cool, so this sub can rock for hours. The stamped steel basket adds strength and support, while a rubber boot and distinctive dust cover lend this sub an extra dash of style.

Priced per speaker

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Product highlights:

12" 4-ohm subwoofer
polypropylene woofer cone with stitched rubber surround
power range: 200-400 watts RMS
peak power handling: 800 watts
frequency response: 31-150 Hz
sensitivity: 86.7 dB
top-mount depth: 6-13/16"
sealed box volume: 1.25 cubic feet
ported box volume: 2.0 cubic feet
warranty: 1 year
MFR # JH5512-04

What's in the box:

MTX JackHammer JH5512-04 owner's manual

12" SVC 4-ohm subwoofer
Specifications booklet

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Researched by Crutchfield's Pat M.

Features & specs

Features and Specs
Size	12 -inch
Impedance (Ohms)	---
Cone Material	Polypropylene
Surround Material	Stitched Rubber
Port diameter (inches)	N/A
Port length (inches)	N/A
Free-Air	No
Dual Voice Coil	No
Sensitivity	86.7 dB at 1 watt
Frequency Response	31 - 150 Hz
Max RMS Power Handling	400
Peak Power Handling (Watts)	800
Top Mount Depth (inches)	6 13/16
Bottom Mount Depth (inches)	7 5/16
Cutout Diameter or Length (inches)	11
Frame Width	12.625
Frame Length	12.625
Vas (liters)	66.5
Fs (Hz)	29.33
Qts	0.52
Xmax (millimeters)	13.46
Parts Warranty	1 Year
Labor Warranty	1 Year
Box Requirements
Ideal Sealed Box Volume (cubic feet)	1.25
Minimum Sealed Box Volume (cubic feet)	1.25
Maximum Sealed Box Volume (cubic feet)	1.25
Ideal Ported Box Volume (cubic feet)	2
Minimum Ported Box Volume (cubic feet)	2
Maximum Ported Box Volume (cubic feet)	2

Product Research

Features
Enclosure Compatibility

Features

Polypropylene Cone: The woofer features a graphite-colored, stitched polypropylene cone with the MTX Audio Jack Hammer logo. Polypropylene is lightweight yet durable and offers efficient, dependable bass response.

Rubber Surrounds: The Jack Hammer series woofer features a rubber surround that is stitched directly to the cone for durability. The woofer's rubber surround uses FEA optimized roll geometry to maximize excursion without sacrificing cone surface area.

Voice Coil: The woofer's voice coil is wound with 428-degree High Temperature wire to ensure reliability even at loud volumes.

Spider Plateau Venting Technology: The Jack Hammer series woofer uses proprietary Spider Plateau Venting technology which helps push out air out of the voice coil and bring cool air in, adding to the reliability of the subwoofer and keeping it cool even in the hottest vehicles.

Asymmetrical Linear Drive System: The woofer's Asymmetrical Linear Drive System combines a flat progressive spider with an extended pole piece to reproduce smooth, linear motion for incredibility crisp, clean sound.

Black Stamped Basket: The JH55 subwoofer has a black stamped basket design for structural strength, a stamped back panel with MTX's aggressive looking Gothic logo, and a large rubber boot protecting the woofer's magnet.

Terminals: The 12" woofer features a pair of nickel-plated, spring-post terminals for attaching your speaker wire from your amplifier.

Enclosure Compatibility

Recommended Sealed Box Volume: MTX recommends mounting this woofer in a sealed enclosure made out of 3/4" MDF with an internal volume of 1.25 cu/ft.

Recommended Vented Box Volume: MTX recommends a ported enclosure made out of 3/4" MDF with an internal volume of 2.00 cu/ft using a 2" wide x 14" tall slot port that is 16.75" long.

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