MPS3004 / RS4004 AUDIO SYSTEMS
INSTALLATION GUIDE
HAWG WIRED
PAGE 14
NEWARK, CA
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CONTROLS DEFINED
CROSSOVER MODE SWITCH:
THIS SWITCH SELECTS WHICH RANGE OF FREQUENCIES THAT THE BUILT-IN CROSSOVER WILL
FILTER. EACH MODE IS EQUIPPED WITH 12DB PER OCTAVE ELECTRONIC FILTERS FOR PRECISE
FREQUENCY ATTENUATION WITH MINIMAL PHASE DISTORTION. THE OPTIONS ARE AS FOLLOWS:
LOW – LOW-PASS – USED WHEN SPEAKER OUTPUTS WILL DRIVE SUBWOOFERS, OR LOW RANGE
SPEAKERS ONLY.
HIGH – HIGH-PASS (DEFAULT) – USED WHEN SPEAKER OUTPUTS WILL DRIVE MIDDLE TO HIGH
RANGE SPEAKERS ONLY (RECOMMENDED SETTING FOR ALL 5.25” SPEAKERS).
CROSSOVER FILTER ADJUSTMENT:
THE PURPOSE OF A CROSSOVER CIRCUIT IS TO FILTER OUT A SPECIFIC RANGE OF FREQUENCIES
FROM A SPEAKER’S INPUT TO MAXIMIZE IT’S PERFORMANCE. FOR A TWEETER, THE GOAL IS TO
FILTER OUT LOW (BASS) RANGE FREQUENCIES TO MAXIMIZE THE HIGH RANGE (TREBLE) RESPONSE.
CONVERSELY, FOR A SUBWOOFER, THE GOAL IS TO FILTER OUT THE HIGH AND MID RANGE
FREQUENCIES, LEAVING ONLY LOW FREQUENCIES TO PLAY THROUGH THE WOOFER.
THERE ARE TWO KINDS OF CROSSOVER IMPLEMENTATIONS, ACTIVE OR PASSIVE:
ACTIVE CROSSOVER – THIS FILTERS SELECTED FREQUENCIES BEFORE THE AUDIO SIGNAL IS
AMPLIFIED, BETWEEN THE SOURCE UNIT AND AMPLIFIER. OUR BUILT-IN CROSSOVERS ARE AN
EXAMPLE OF THIS TYPE OF CROSSOVER.
THE GOOD - BY REMOVING UNWANTED FREQUENCIES FROM THE SIGNAL BEFORE IT’S AMPLIFIED, YOUR OUTPUT
BECOMES MORE EFFICIENT, ONLY WORKING TO AMPLIFY THE DESIRED RANGE OF FREQUENCIES.
THE BAD - BY REMOVING UNWANTED FREQUENCIES FROM THE SIGNAL BEFORE IT’S AMPLIFIED, YOU ARE DEDICATING
THOSE FILTERED CHANNELS TO ONLY PROVIDE A CERTAIN FREQUENCY RANGE.
PASSIVE CROSSOVER – THIS FILTERS SELECTED FREQUENCIES AFTER THE AUDIO SIGNAL HAS
BEEN AMPLIFIED, BETWEEN THE AMPLIFIER AND SPEAKER. SOME SPEAKERS ARE SOLD WITH
PASSIVE CROSSOVERS INCLUDED, TYPICALLY A SMALL PLASTIC ENCLOSURE (LIKE OUR
COMPONENT SERIES), OR CAPACITORS AND/OR COILS MOUNTED DIRECTLY TO THE SPEAKER (LIKE
OUR UPGRADE AND PERFORMANCE SERIES).
THE GOOD - BY REMOVING UNWANTED FREQUENCIES FROM THE SIGNAL AFTER IT’S AMPLIFIED, YOUR AMPLIFIER’S
OUTPUT IS STILL FULL RANGE, ALLOWING MORE FLEXIBLE USE, ABLE TO DRIVE TWEETERS, MID-RANGE, AND
SUBWOOFERS ALIKE.
THE BAD - BY REMOVING UNWANTED FREQUENCIES FROM THE SIGNAL AFTER IT’S AMPLIFIED, YOU ARE FORCING THE
FULL RANGE OF FREQUENCIES TO BE AMPLIFIED, REDUCING THE AMPLIFIER’S MAXIMUM POSSIBLE EFFICIENCY.
OUR BUILT-IN ACTIVE CROSSOVER(S) ARE FULLY ADJUSTABLE FROM 50HZ TO 250HZ, USING
EITHER A LOW-PASS MODE (BASS ONLY) OR HIGH-PASS MODE (MIDRANGE AND HIGHS ONLY)
TO EASILY MAXIMIZE YOUR SPEAKER’S POTENTIAL.
