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 WARNING

 WARNING

This symbol means important instructions. 

Failure to heed them can result in serious injury or death.

 CAUTION

This symbol means important instructions. 

Failure to heed them can result in injury or property damages. 

 

STOP USE IMMEDIATELY IF A PROBLEM OCCURS. 

Failure to do so may result in personal injury or damage to the 

product. Return it to your authorized STEG dealer

.

 HAVE AN EXPERT DO THE WIRING AND INSTALLATION. 

This unit requires special technical skill and experience for 

wiring and installation. To insure safety and proper fun

ction, always contact the authorized dealer where you purchased 

the product to have it done professionally.

  

INSTALL THE UNIT SECURELY WITH SPECIFIED PARTS. 

Be sure to use only the included parts and specified installation 

accessories (not included). Use of other than designated parts may damage this unit.  Install the unit securely so that it 
will not come loose during a collision or sudden jolt.

 

ROUTE WIRING AWAY FROM SHARP EDGES AND MOVING PARTS.

 Arrange cables and wiring away from sharp or 

pointed edges and avoid moving parts such as seat hinges or rails to prevent pinching or wear. Use loom protection 
where appropriate and always use a grommet for any wiring routed through metal. 

 NEVER RUN SYSTEM WIRING OUTSIDE OR UNDERNEATH THE VEHICLE.  

All wiring must 

be routed, secured and 

protected inside the vehicle. Failure to do so may result in fire, injury or property damage.

 

INSTALL THE UNIT IN A DRY AND VENTILATED LOCATION.

 Avoid mounting locations where the unit will likely be 

exposed to high moisture or heat without adequate ventilation.  Moisture penetration or heat buildup may result in 
product failure. Always make sure the amplifier chassis temperature is safe before touching it.

 

REDUCE GAIN AND SOURCE VOLUME TO MINIMUM LEVELS FOR INITIAL SYSTEM TUNING.

 Ensure amplifier power is 

off before connecting signal cables and follow proper system gain setting procedures. Failure to do so may result in 
damage to the amplifier and/or connected components. 

 CAUTION

1

 Package Contents:

Main Unit

Accessories Required for 

Installation 

(not included)

:

Ÿ

RCA Interconnects

Ÿ

Power/Ground/Speaker Wire

Ÿ

In-line Fuse Holder w/Fuse

Ÿ

Battery Ring Terminal

Ÿ

Chassis Ground Terminal

Ÿ

Wire Crimp Connectors

Ÿ

Grommets and Loom

Ÿ

Cable Ties 

Ÿ

Mounting Screws 

Remote Level Controller

Terminal(s)

(QM500.1 only)

 

DO NOT DRIVE WHILE DISTRACTED.

  Any function that requires your prolonged attention should not be performed 

while driving. Always stop the vehicle in a safe location before performing any such function. Failure to do so may result 
in an accident.

 KEEP THE VOLUME AT MODERATE LEVELS WHILE DRIVING. 

 Excess volume levels can obscure sounds such as 

emergency vehicle sirens or road warning signals and may result in an accident. Continuous exposure to high sound 
pressure levels may cause permanent hearing loss. Use common sense and practice safe sound.

 FOR USE WITH 12V NEGATIVE GROUND VEHICLE APPLICATIONS ONLY.

  Using this product other than in its designed 

application may result in fire, injury or product damage.

MAKE THE CORRECT WIRING CONNECTIONS AND USE PROPER FUSE PROTECTION.

 Failure to connect wiring 

correctly with appropriate gauge and fuse protection may result in fire, injury or product damage .  When replacing 
fuse(s) in the unit, never exceed the specified rating. Ensure proper protection of all system power wiring and install an 
external fuse (not included) with specified rating for each amplifier connected with the +12V lead at the battery terminal. 

 

DISCONNECT THE NEGATIVE BATTERY TERMINAL BEFORE INSTALLATION.

 Failure to do so may result in fire, injury or 

damage to the unit.

 

D O NOT ALLOW CABLES TO BECOME ENTANGLED IN SURROUNDING OBJECTS.

 Arrange wiring and cables to prevent 

obstructions when driving. Cables or wiring that obstruct or hang up on places such as steering wheel, brake pedals, etc. 
can be extremely hazardous.

 

DO NOT DAMAGE VEHICLE SYSTEMS OR WIRING WHEN DRILLING HOLES.

 When drilling holes in the chassis for 

installation, take precautions so as not to contact, puncture or obstruct brake lines, fuel lines, fuel tanks, electrical wiring, 
etc. Failure to take such precautions may result in fire or an accident.

 

DO NOT UTILIZE OR CONNECT TO ANY PART OF VEHICLE SAFETY SYSTEMS.

 Bolts, nuts or wires used in the brake, 

airbag, steering or any other safety-related systems or fuel tanks should NEVER be used for mounting, power or ground 
connections. Using such parts may disable control of the vehicle or result in fire.

Summary of Contents for QM75.4

Page 1: ...Car Audio Power Ampli ers USER S GUIDE QM75 4 QM500 1...

Page 2: ...Speaker Wire In line Fuse Holder w Fuse Battery Ring Terminal Chassis Ground Terminal Wire Crimp Connectors Grommets and Loom Cable Ties Mounting Screws Remote Level Controller Terminal s QM500 1 onl...

Page 3: ...me Note All speci cations are subject to change without notice QM75 4 QM500 1 4 14 4V 75W x 4 200W x 1 2 14 4V 105W x 4 350W x 1 4 BTL 14 4V 210W x 2 1 14 4V 500W x 1 FrequencyResponse 0 3dB 1W 4 10Hz...

Page 4: ...e speci ed value for each fuse 30A Power Protect LEDs POW PRO These LEDs indicate the amplifer status Green indicates the ampli er is on and in normal operation Red indicates the ampli er is in protec...

Page 5: ...nnel Stereo Bridged 2 Channel Bridged QM75 4 Speaker Connection Examples Bridged Con guration Example 2 min 2 min 2 min 2 min 2 min 2 min 4 min 4 min 4 min QM500 1 Subwoofer Connection Examples 1 min...

Page 6: ...5 4 model and sets the HPF cut o frequency Fc from 15Hz to 3 5kHz with a slope of 12dB oct For smaller full range or component speakers use the high pass HPF setting to lter out unwanted lower frequen...

Page 7: ...no defect is found the item will be returned to dealer Items misused altered or neglected are not covered W vtech will not be liable for any loss cost of repair or any other damage of any kind connect...

Page 8: ...ed is subject to change The described in this User s Guide represent just a part of the STEG products available All brands and trademarks mentioned have been used exclusively for description purposes...

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