Mounting, Wiring Options | MTX Audio JackHammer guide

MOUNTING

Mounting the JackHammer is nothing that can be taken lightly, quite literally. You need to follow the steps below carefully and have all the necessary equipment. You will need to be able to lift the nearly 370 lbs. subwoofer comfortably. MTX Audio recommends a fork lift for safe installation.

The woofer is designed to distribute its weight evenly throughout the entire structure. This is accomplished by including rear motor mounts with 5⁄8"-11 bolts so it is mounted from both the front and the back. It is important that both these sides are mounted properly to ensure proper weight distribution. The drawing above shows the rear mounting hole detail for the back support. The holes are located on an 8 5⁄8" bolt circle, meaning the holes are located on a radius of 4 5⁄16" from the center point. Use the pallet from the Jackhammer packaging to make a mounting template if needed. For the recommended 1" bafﬂe, the bolts needed should be 5⁄8"-11 threaded bolts 1 3⁄4" long. Washers should be used with the 5⁄8"-11 bolts to be sure there will be no air leaks around the bolts.

Note: MTX Audio also recommends making the back of the enclosure removable to replace the woofer cone if ever needed. This would make it possible to replace the cone assembly without removing the woofer.

In the gasket of the woofer, there are four eyelet rings. Make sure they are screwed in securely and then attach a chain between them for lifting. Use one tine of the fork lift to lift the JackHammer with the chain then slowly lower it into the enclosure. Unscrew the eyelets and align the woofer with the front and rear mounting holes, and then fasten it using the screws and bolts provided. Remember to pre-drill the screw holes using a

5⁄32" drill bit. Then, lift the enclosure, complete with JackHammer, into the back of the vehicle.

For models shipped already in the enclosure, installation becomes a step easier; you need to just lift the enclosure with JackHammer into the back of the vehicle. Continue on to the wiring section.

Note: This unit is EXTREMELY heavy! Make sure everyone is clear and out of the way in case something should break or fall!

Note: MTX Audio is not responsible for damages occurred during installation. For custom installation help or answers to further questions, please call 1-800-CALL-MTX.

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WIRING OPTIONS

Often overlooked, the installation components used to connect the entire system need to match the maximum capability of the system or you will lose performance. MTX Audio recommends using StreetWires 4 AWG cable as the speaker wire.

Dual Voice Coil Wiring

JackHammer Superwoofers are available in a dual 2 Ohm (T9922-22) or dual 4 Ohm (T9922-44) voice coil conﬁguration for either SPL or SQL uses. The voice coils are labeled VC1 and VC2.

Note: Both voice coils should always be connected. See the section on Strapping Thunder Ampliﬁers for ampliﬁer connections.

Independent Voice Coil Connection Conﬁguration

This connection is ideal when using two Thunder TA81001 ampliﬁers per voice coil (4 ampliﬁers total). See the section on Strapping Thunder Ampliﬁers for ampliﬁer connections.

Parallel Conﬁguration

T9922-44 – Wiring the voice coils in a parallel conﬁguration will have a total ﬁnal load of 2 Ohm. Connect each of the dual voice coil’s positive terminals together so that they share the same source (ampliﬁer). Do the same for the negative terminals. This connection is ideal when using two Thunder TA92001 ampliﬁers.

T9922-22 – Wiring the voice coils in a parallel conﬁguration will have a total ﬁnal load of 1 Ohm. Connect each of the dual voice coil’s positive terminals together so that they share the same source (ampliﬁer). Do the same for the negative terminals.

Note: The wiring of the dual voice coils will affect impedance for the ampliﬁer system. Care must be taken to assure that the resulting impedance does not exceed the ampliﬁer’s requirements.

JackHammer specifications

The MTX Audio JackHammer is a powerhouse in the world of subwoofers, known for its sheer size, impressive performance, and engineering excellence. Developed for those who demand deep, thunderous bass, the JackHammer has carved a niche for itself among audiophiles and car audio enthusiasts alike.

One of the most striking features of the JackHammer is its massive 18-inch diameter. This size isn’t merely for show; it enables the subwoofer to move a significant amount of air, which is crucial for producing the deep bass that many listeners crave. The JackHammer is designed to handle high power levels, boasting an impressive RMS power handling capability, which ensures that it can deliver the loud bass without distortion even at high volumes.

Another standout characteristic of the JackHammer is its innovative design. The subwoofer features a high-temperature voice coil, which allows it to handle substantial power without overheating, thereby increasing the system's durability and reliability. The subwoofer also utilizes a dual voice coil configuration, allowing for flexibility in wiring and impedance that can be adapted to suit various system setups.

MTX Audio has equipped the JackHammer with advanced materials to enhance its performance. The cone is constructed from durable materials that resist flexing and distortion, ensuring that the sound produced is clean and precise. The heavy-duty rubber surround plays a vital role in maintaining the integrity of bass production, allowing for greater excursion and improved sound quality.

Additionally, the JackHammer is engineered for optimal efficiency with its specially designed magnet structure. The powerful magnet increases sensitivity and overall output, enabling it to produce maximum sound even with lower power input. This feature is particularly useful for those looking to integrate the subwoofer into different audio setups without compromising on sound quality.

For those who are serious about their car audio experience, the MTX Audio JackHammer stands out as an emblem of raw power and performance. Whether for competition use or personal enjoyment, this subwoofer combines size, innovative technology, and robust construction to create a bass experience that is truly dynamic and engaging. The JackHammer exemplifies MTX’s commitment to delivering high-performance products that cater to the needs of bass enthusiasts around the world. With its unmatched features and capabilities, the JackHammer proudly continues to set benchmarks in the world of subwoofers.