Dual Electronics DA704L - Manual (Page 8)

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.
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.
This control allows precise adjustment of the
crossover frequency.
This control provides additional boost @ 45Hz
when used with subwoofers. Adjust this control
with caution - as improper use can damage
speakers!
Setting this control to the desired frequency will
limit harmful frequencies below the setting from
going to the subwoofer(s), preventing possible
damage from frequencies that subwoofers are not
designed to handle.
The green LED indicator illuminates during normal
operation (POWER) and the red LED indicator
is visible when the amplifier detects a fault
(PROTECT).
Input level Control
Crossover Mode
Crossover Frequency
Control
Bass Boost
Subsonic Filter
(DA704L )
LED Indicators
INSTALLATION
Configuration/Setup
8