Dual Electronics XPR540 - Manual (Page 8)

8
Configuration/Setup
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.
Select 2 CH mode if the head unit only has 1 pair of RCA
outputs. Plug the RCA’s from the head unit into either the
front or rear channel. All 4 amplifier inputs will receive a
signal.
Note: There is no fader function when using 2 CH mode.
Select 4 CH mode if the head unit has 2 pairs of RCA outputs.
Plug the RCA’s from the head unit into either the front or
rear channel.
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 OFF when using with coaxial-type
speakers.
Note: Choose OFF 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!
The LED indicator illuminates blue during normal operation
(POWER) and red when the amplifier detects a fault
(PROTECT).
Input level Control
Input Mode Switch
(XPR540)
Crossover Mode
Crossover Frequency
Control
Bass Boost
LED Indicator