2
C ON N ECT SIGNAL
JH404 – 400 WATT 4-CHANNEL, JACKHAMMER AMPLIFIER
Optional sum output
to additional amplifier
MTX WARRANTY STATEMENT
Proof of purchase is required when requesting service, so please retain your sales receipt, and take a moment to register your product online at MTX.com.
Also, a Return Authorization number (RA) is required before shipping product back to MTX, call 800-225-5689 or 602-438-4545, for amplifier RAs.
REQUIRED
INSTALLATION
TOOLS
Adjustable
Wrench
Utility
Knife
Allen Wrench
HP
GAIN
3
LP
HP/FULL
ON
(Do not use with
Smart-Engage™ RCA
to Line Level Adapters)
OR
Crimper
SETTINGS
SMART ENGAGE
OFF
Power
Drill
LP/FULL
CONNECT SPEAKER(S) OR SUB(S)
SEPARATES/COAXIAL FRONT STEREO
Aftermarket Head Unit
(Remote turn-on wire connected)
5V
0.25V
Adjust input sensitivity
OFF ON
to match source unit
Factory Head Unit
(Remote turn-on wire not connected)
1
40Hz
8kHz
40Hz
Adjust High Pass
crossover frequency
5kHz
+ – + –
SUBWOOFER FRONT BRIDGED
+ – + –
OR
Adjust Low Pass
crossover frequency
BANDPASS
CONNECT POWER
Ground To
Metal of Vehicle
(Remove Paint
From Metal)
Source Unit
REMOTE TURN-ON
/POWER ANTENNA WIRE
MTX JackHammer amplifiers purchased in the USA from an authorized MTX dealer are guaranteed against defects in material and workmanship for the
period of 1 year if installed by an authorized MTX dealer (90 days if by customer). 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. Product found to be defective during that period will be repaired or replaced by
MTX at no charge. This warranty is void if it is determined that unauthorized parties have attempted repairs or alterations of any nature. Warranty does not
extend to cosmetics or finish. Before presuming a defect is present in the product, be certain that all related equipment and wiring is functioning properly.
MTX disclaims any liability for other incurred damages resulting from product defects. Any expenses in the removal and reinstallation of products are not
covered by this warranty. MTX’s total liability will not exceed the purchase price of the product. If a defect is present, your authorized MTX dealer may be
able to effect repairs.
4 AWG
–GND
4 AWG
16 AWG
SEPARATES/COAXIAL
REAR STEREO
+BAT
T REM
+ – + –
SUBWOOFER
REAR BRIDGED
+ – + –
OR
Disconnect Battery Negative (–) Cable
Prior to Installing Amplifier
(Reconnect after step 3)
Connect to Source
Unit Remote Turn-on
/Power Antenna Wire
PROBLEMS, QUESTIONS, CONCERNS, SUGGESTIONS? CALL 1-800-CALLMTX
MTX002963 RevC 4/10 NDM588
mtx.com
JH404 – 400 WATT 4-CHANNEL, JACKHAMMER AMPLIFIER
JACKSTAND™ INSTALLATION
EBC MOUNTING
EBC available separately
1.
Mount EBC to
the dashboard
or within reach
2.
Twist
to lock
Twist
to lock
OR
EBC ADJUSTMENT
EBC available separately
1.
AMPLIFIER GAIN
SETTINGS
Turn Gain to 5V
EXTERNAL BASS CONTROL
SETTINGS
Turn EBC to max
2.
CAUTION: JackStands are designed for stacking a maximum of three tiers of JackHammer Amplifiers
and are not intended for installation within the passenger compartment of the vehicle.
ACTIVE FAN COOLING™ WARNING
Adjust gain to final level
that does not cause distortion
EBC will now be fully adjustable
up or down for best performance
NOTE: EBC will adjust the output level of the rear channels only.
Low Pass Crossover must be engaged to enable EBC.
Do not block air inlets (top)
or outlets (sides) for
best performance
INDICATORS
Thermal
Power
©2010 Mitek Corporation. All rights reserved. MTX , Thunder, JackHammer, JackStands, Axe, SledgeHammer, ThunderForm
Smart Engage and Active Fan Cooling are registered trademarks of Mitek Corporation.
Protect
PROBLEMS, QUESTIONS, CONCERNS, SUGGESTIONS? CALL 1-800-CALLMTX
MTX002963 RevC 4/10 NDM588