Owner’s Manual
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INTRODUCTION
Thank you for choosing MTX to help you reach your ultimate goal with your vehicle. The MTX JackHammer is
a true 22" subwoofer with power and performance beyond anything ever attempted in the mobile audio world.
This behemoth, is capable of handling up to 4,000 watts of RMS power. Designed for those who want to show
off the biggest woofer ever made.
This subwoofer is perfect for excessive bass and competition use. It can also be Re-coned if needed. For
more information, see the Piston Change (Re-cone Kit) section in this manual or call 1-800-CALL-MTX.
The most enormous subwoofer continues to prove that MTX is the biggest, baddest, boldest car audio...ever!
Model T9922-22
Description
Impedance
Frequency Response
SPECIFICATIONS
Power Handling (RMS)
Recommended RMS
Amplifier Power
Voice Coil Diameter
Magnet Weight
Mounting Depth
Cut Out Diameter
Sealed Enclosure Net Volume
Vented Enclosure Net Volume
Port Dimensions (Slot Port)
Speaker Displacement
Port Displacement
Tune Frequency
T9922-22
Fs = 24 Hz
Qms = 5.044
Vas = 5.776 cu.ft
Cms = 0.039 mm/N
Mms = 1140.0 g
Rms = 33.92 kg/S
Xmax = 1 in
Xmech = 3 in
P-Dia = 18.49 in
Sd = 267.84 sq.in
22" JackHammer SuperWoofer
with dual 2 Ohm voice coil
2x2 Ohms
20Hz-150Hz
4000 Watts
2000-4000 Watts
6.5"
900 oz.
21.063"
20.025"
3
6.0 ft
3
8.7 ft
1
24
⁄8"H x 33⁄16"W x 10"L
3
1.8 ft
3
.5 ft
32Hz
P-Vd = 0.155 cu.ft
Qes = 0.441
Re = 0.87 ohms
BL = 18.41 Tm
Qts = 0.406
no = 0.487 %
2.83V SPL = 98.8 dB
BEFORE STARTING
It is very important that you have your JackHammer installed by an authorized MTX retailer, that is preferably
MECP certified. Before installation, make sure you have read the instructions carefully and have the following
equipment:
• Fork Lift (or another means of lifting approximately 370 lbs.)
• Electric drill • 5⁄32" drill bit • 5⁄32", 4mm, 3⁄16" hex keys
• Safety glasses • T-30 Torx • 3mm hex wrench (if re-coning)
• Six 5⁄8"-11 bolts 1 3⁄4" long • 15⁄16" wrench or socket
ElECTRICAl UPGRADE
A factory electrical system will not be able to handle the power requirements of the amplifiers that are
needed to drive the JackHammer. You will need to upgrade your vehicle’s electrical system with both
additional batteries and alternators. MTX Audio recommends West Co. SVR80 or SVR100 because they are
a sealed battery that can be mounted in any configuration and supply the power needed. Also high-output
alternators from either Ohio Generator or PowerMaster. It is recommended to use anywhere from 3 to 6
StreetWires capacitors to help control the flow of power, call 877.STREET1 for more information. The diagram
below shows the wiring needs of your entire vehicle. Please see the Strapping Thunder Amplifiers section for
further information.
StreetWires
1/0 AWG Wire
Isolator
or Relay
200 Amp
Minimum
StreetWires
StreetWires
Distribution
Blocks
StreetWires
1/0 AWG Wire
4 AWG Wire
1F 1F 1F
StreetWires
4 AWG Wire
StreetWires
Capacitors
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RECOMMENDED ENClOSURE REQUIREMENTS
For Sealed Enclosures
The JackHammer requires a volume of 4.2 cubic ft (net) per woofer. The woofer’s displacement is 1.8 cubic ft.
The total gross volume will be 6 cubic ft.
For Vented Enclosures
The JackHammer requires a volume of 8.7 cubic ft (net) per woofer. The woofer’s displacement is 1.8 cubic ft.
The port’s internal dimensions are 24-1⁄8" x 3-3⁄16" x 10" and it takes approximately
.5 cubic ft. The total gross volume will be 11.0 cubic ft.
Additional ranges of sealed volumes for a sealed box is 5 cubic ft or greater gross volume.
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The nal tuning frequency is 32Hz. Additional vented box suggestions are 7.75 to 9.5 (net) cubic ft. Remember
to account for the driver (1.8 cubic ft) and the port displacement, with port tuning ranges from 32 to 42Hz,
when mounting.
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