MPS3004 / RS4004 AUDIO SYSTEMS
INSTALLATION GUIDE
HAWG WIRED
PAGE 13
NEWARK, CA
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CONTROLS DEFINED
INPUT MODE SWITCH:
THIS SWITCH SELECTS WHICH MODE OF INPUT THE AMPLIFIER IS CONFIGURED FOR, HIGH LEVEL
INPUT OR LOW LEVEL INPUT. THE OPTIONS ARE AS FOLLOWS:
HI – HIGH LEVEL INPUT MODE – USED WHEN CONNECTING TO SPEAKER OUTPUTS FROM A
SOURCE UNIT AS INPUTS TO THE AMPLIFIER. THIS IS THE INPUT MODE TO CONNECT A
FACTORY HARLEY-DAVIDSON
®
SOURCE UNIT TO THIS SYSTEM.
LO – LOW LEVEL INPUT MODE – USED WHEN CONNECTING INDUSTRY STANDARD RCA OUTPUTS
FROM AN AFTERMARKET SOURCE UNIT AS INPUTS TO THE AMPLIFIER. THIS IS THE PREFERRED
METHOD WHEN RCA OUTPUTS ARE AVAILABLE, AND WILL PRODUCE THE CLEANEST SOURCE
SIGNAL TO THE AMPLIFIER.
CHANNEL MODE SWITCH:
THIS SWITCH SELECTS HOW MANY CHANNELS OF INPUT THE AMPLIFIER IS CONFIGURED FOR, 2 OR
4 CHANNELS. THE OPTIONS ARE AS FOLLOWS:
2CH - 2 CHANNEL MODE – USED WHEN ONLY 2 CHANNEL SOURCE IS CONNECTED TO THE
MAIN AMPLIFIER. USING THIS SETTING WILL FORCE THE FRONT AND REAR OUTPUTS TO BE
DRIVEN BY ONLY THE FRONT PAIR OF INPUTS.
4CH – 4 CHANNEL MODE – USED WHEN 4 CHANNEL SOURCE IS CONNECTED TO THE MAIN
AMPLIFIER. USING THIS SETTING WILL FORCE THE FRONT AND REAR OUTPUTS TO BE DRIVEN
BY BOTH FRONT AND REAR INPUTS INDEPENDENTLY.
NOTE: THIS ALLOWS FRONT TO REAR FADING FROM THE SOURCE UNIT (IF AVAILABLE).
INPUT GAIN ADJUSTMENT:
A COMMON MISCONCEPTION ABOUT GAIN ADJUSTMENT ON AMPLIFIERS IS THAT “MORE GAIN =
MORE VOLUME”. ACTUALLY, IT’S NOT THE VOLUME THAT’S BEING INCREASED, BUT RATHER THE
AMPLIFIER’S SENSITIVITY TO THE SOURCE INPUT. BY INCREASING THE GAIN LEVEL, YOU’RE
INCREASING HOW SENSITIVE THE AMPLIFIER IS TO THE SIGNAL IT RECEIVES FROM THE SOURCE
UNIT. THIS IS WHY IT’S IMPORTANT TO SET THE GAIN PROPERLY, RATHER THAN SIMPLY TURNING
THE KNOB UNTIL IT’S REALLY LOUD.
GAIN ALLOWS THE FOLLOWING NOMINAL OPERATING LEVEL ADJUSTMENTS:
LOW LEVEL INPUT (RCA LINE-IN) - 250MV TO 2.5V
HIGH LEVEL INPUT (SPEAKER-IN) - 500MV TO 5V
THESE VOLTAGE LEVELS CAN ACCOMMODATE VIRTUALLY ANY HARLEY-DAVIDSON
®
OR OTHER BRAND
OF CAR, MARINE, OR MOTORCYCLE SOURCE UNITS, AS WELL AS JUST ABOUT ANYTHING THAT HAS
RCA OR LINE-OUT STYLE OUTPUTS.
WARNING: SETTING THE GAIN TOO HIGH IN AN ATTEMPT TO GET “MORE VOLUME” CAN NOT ONLY CAUSE PREMATURE
DISTORTION, BUT CAN ALSO DAMAGE YOUR SPEAKERS. IF YOUR SYSTEM CONFIGURATION RESULTS IN YOUR GAIN
CONTROL BEING SET OUTSIDE THE TYPICAL RANGE AS INDICATED ABOVE, CALL US TO RESOLVE THE PROBLEM.
