Dual DMA804D Installation & Owner's Manual page 9

INSTALLATION
Configuration/Setup
Input level Control
The input level control (gain) is used to obtain the
best possible match between the head unit audio
output and the amplifier input. Begin by turning
the input level control fully counterclockwise. Next,
turn up the head unit volume control around 3/4 of
the way up. Adjust the input level control clockwise
until audible distortion is heard, then slightly
counterclockwise to provide the best match.
Repeat for all input level controls.
Crossover Mode
The crossover is used to filter out frequencies
above or below a certain point. Choose LPF when
using the amplifier with subwoofers, HPF when
using with midrange/tweeter combinations and
FLAT when using with coaxial-type speakers.
Note: Choose FLAT when using the amplifier in
stereo/bridged simultaneous mode. In this mode,
passive crossovers are required. Failure to use
the correct passive components may damage the
amplifier and/or speakers. Consult a qualified
professional for recommendations.
Crossover Control
This control allows precise adjustment of the
crossover frequency.
Bass Boost
This control provides additional boost @ 45Hz
when used with subwoofers. Adjust this control
with caution - as improper use can damage
speakers!
Power / Protect Colored LED indicators illuminate from the plastic
Indicators
power terminal. The blue LED illuminates during
normal operation (POWER) and the red LED
indicator is visible when the amplifier detects a
fault (PROTECT).
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