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©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. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   MTX002963 RevC 4/10  NDM588

PROBLEMS, QUESTIONS, CONCERNS, SUGGESTIONS? CALL 1-800-CALLMTX 

mtx.com

JH404

 

– 400 WATT 4-CHANNEL, JACKHAMMER AMPLIFIER 

ACTIVE FAN COOLING

™  

WARNING 

JACKSTAND

™  

INSTALLATION 

Do not block air inlets (top) 

or outlets (sides) for 

best performance 

OR 

Twist 

to lock 

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. 

EBC MOUNTING 

EBC available separately 

Mount EBC to

the dashboard 

or within reach

2. 

1. 

Twist 

to lock 

EBC ADJUSTMENT

EBC available separately

Adjust gain to final level

that does not cause distortion

EBC will now be fully adjustable

up or down for best performance

2.

1.

AMPLIFIER GAIN

SETTINGS

EXTERNAL BASS CONTROL

SETTINGS

Turn Gain to 5V

Turn EBC to max

NOTE

EBC will adjust the output level of the rear channels only.

 

Low Pass Crossover must be engaged to enable EBC.

INDICATORS

Power

Protect

Thermal

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