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
(AX450DM)
Subsonic Filter
(AX450DM)
LED Indicators
INSTALLATION
Configuration/Setup
8