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MTX Audio JackHammer JH4512X2D

1000W Max, Dual 12" Jack Hammer JH45 Series Loaded Vented Enclosure - 2 ohms Final Impedance

4.8

(5 reviews)

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The product on this page is discontinued.
Authorized MTX Dealer
MTX has done it again. Building on the strength and popularity of MTX's TC enclosures, the loudest boxes on the block, the new JackHammer series enclosures leave no doubt as to who the enclosure king is. A refined look and redefined attitude that features a flat black finish in JH45 series enclosures or a gloss black finish in JH55 series enclosures and with MTX's famous side-firing super slot port, these enclosures produce epic amounts of bass and put all competitors to shame. Classic MTX quality goes into the production of every JackHammer enclosure including extra strength 3/4" MDF panels and dado/v-groove construction giving JackHammer enclosures the ability to bring the pain 24/7.

Subwoofer Features:

  • Dual 12" JackHammer Series Round 45 Loaded Vented Enclosure
  • Power Handling:
    • Peak: 1000 watts (500 watts per sub)
    • RMS: 500 watts (250 watts per sub)
  • Impedance: 2 Ohms
  • Polypropylene cone woofer
  • Rubber surround
  • Precision Stamped Basket for greater structural integrity
  • ALDS (Asymmetrical Linear Drive System)
  • 1-3/4" High temperature voice coil
  • 70oz. Magnet
  • Frequency response: 26-150 Hz
  • Sensitivity: 86.7 dB
  • Dimensions: 18-3/4"D x 31-3/4"W x 15-3/4"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty (subwoofer only)
Enclosure Features:
  • Side firing super slot port
  • 8 gauge, nickel plated terminals for easy connection
  • Angled corners provide an aggressive, unique look
  • Interlocking dado/v-groove joining offers added strength
  • 3/4" MDF construction
  • 80° back wall to fit tight against rear seat backs (also provides a great place to mount an amp!)
  • Carpeted Black
Subwoofer Specifications
Subwoofer Size12"
Voice Coil(s)Single
Impedance (Per Voice Coil)2 ohms
RMS Power Handling250 watts
Total RMS Power Handling500 watts
Peak Power Handling500 watts
Total Peak Power Handling1000 watts
Woofer CompositionPolypropylene
Woofer SurroundRubber
Sensitivity86.7 dB
Frequency Response26 - 150 Hz
Xmax (millimeters)N/A
Enclosure Specifications
Box TypeVented / Ported
Number of Subs/Speakers2
Box Style/ShapeSquare/Rectangle
Height15-3/4"
Width31-3/4"
Depth18-3/4"
Second DepthN/A
Wood Thickness3/4"
Number of Terminals1
Terminal TypeSpring posts
Box Exterior ColorBlack
Box FinishCarpet
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
Customer Review Summary for MTX Audio JackHammer JH4512X2D
Average Customer Rating is 4.8 out of 5 stars:
4.8
based on 5 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
80%
4 star:
.
.
20%
3 star:
.
0%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
5.0
Value
4.4
Features
4.2
Design
5.0
Usability
5.0
what's this?
Most Helpful Customer Reviews:
April 21, 2010 Makes my whole car shake!
Review by
Jose from Mansfield, TX
Overall
Durability
Value
Features
Design
Usability
Have this enclosure in my SX4 along with a MTX 600XD amp. Excellent sound and products from MTX. Makes everything in my car shake and vibrate! I see why this item is usually out of stock. But Sonic is quick to replenish their supply. Am more than happy with this product and Sonic customer support. Would recommend both to anyone. Thanks, again Sonic!!!
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April 8, 2010 Jackhammers 12"
Review by
stephen from virginia beach, VA
Overall
Durability
Value
Features
Design
Usability
These are some sick subs hit hard in my bronco. I will go bigger next time because my car is big and needs big subs but if you put these in a small car these subs will blow everyone else out of the water. I say get em they r worth the money!
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February 17, 2010 Great subs, so so box
Review by
farve from independence, MO
Overall
Durability
Value
Features
Design
Usability
Im sure this box would go good in a car with a trunk, as for me i own a hatch back and it just didnt fit my personal taste with the position of the vent, so ive made a new box, owned the subs for about 1 1/2 years now in a daily driver and i am NOT nice to these subs.
they will float out but ive never managed to make them distort or rattle.

these subs are wonderful i've never regretted buying them especially for the price, they punch pretty hard, and i suppose depending on your vehicle/set up still have quite a bit of clarity (remembering this isn't rated in there box)

the box shown looks fairly well built, not divided internally.
i suppose this is fine for a mono block but i like some depth\clarity to my system which is kinda hard to get on this set up, i'd recommend using a separated box, i've had these in ported, sealed, and that vented box, the subs do pretty good either way.
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June 29, 2009 Bumps!!
Review by
Sherwin from Pawtucket, RI
Overall
Durability
Value
Features
Design
Usability
I thought the low RMS would be junk but they bump so hard! They mad my whole car rattle. My trunk door was literally pumping in and out. I love these!!
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March 12, 2009 They bump in my trunk
Review by
Jesus from La Habra, CA
Overall
Durability
Value
Features
Design
Usability
i have had many beginner subs since i got my first subs, but these things are something else! the moment i connected these, they started shaking my entire car! i was like "WOW! my car has never rattled before until i got these bad boys".. i recommend these to any one starting out ...this box is all quality!
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Speaker Wire
Get the best sound out of your new pre-enclosed subwoofer with some high grade speaker wire. The higher the quality of the speaker wire, the better the subwoofer will sound.
 ProductPriceAdd?
StreetWires Speaker WireStreetWires Speaker Wire
25 ft. of 12 Gauge speaker cable with twisted pair construction for improved power flow and fine-stranded copper windings
$29.99
Monster Cable 300 Series XLN+ Speaker CableMonster Cable 300 Series XLN+ Speaker Cable
25 ft. of 12 Gauge speaker cable with twisted pair construction for improved power flow and fine-stranded copper windings
$32.00

Product Summary

Manufacturer: MTX
Model number: JH4512X2D
UPC: 715442512133
Weight: 75.00 lbs
Internal SKU: jh4512x2d
Internal product ID: 14831
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Customer Testimonial

I have been using this site to compare products. Only one exception they have carried everything needed! I have used John, he has been great! In every matter that I perceived as a problem, he has fixed with no issue! He is very very knowledgeable, friendly & his communication skills are first rate.

- Mr. Mike from Nashville, Tn.

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