6
Fuse Rating
When replacing fuses, make sure new fuse
is the correct type and amperage. Using an
incorrect fuse could damage the amplifier.
XPR522
30 amp ATO x 1
XPR540
25 amp ATO x 2
Main Power Connections
C12V, GND and REM wires accordingly. A suitable fuse MUST be installed on the
+12V lead within 18" of the battery for protection of the vehicle’s electrical system.
Typical Wire Routing
Power/Ground Wire Size
For optimum performance, use only the wire
size listed below or larger. Make sure to use
the same size power and ground wire.
XPR522
10 awg
XPR540
8 awg
7
Amplifier Connections
Speaker Connections
Connect speaker wires observing
polarity.
The minimum impedance
load for the XPR522 or XPR540
is 2 ohms stereo and 4 ohms
bridged. Use of loads lower than
these is not recommended and
may cause amplifier damage. The
XPR522 and XPR540 can be wired
for stereo, bridged or stereo/
bridged simultaneous operation.
Input Signal Connections
Low Level Input (RCA)
Low level (RCA) input signal is preferred for best performance. Typical trunk-mount
amplifier installations require a 17-20 foot RCA cable. Most trucks and under-seat
applications require a 6-9 foot RCA cable. Using twisted pair construction RCA cables will
minimize noise.
High Level Input (Speaker Wire)
High level inputs should only
be used when RCA outputs are
not available from the head unit.
Connect the head unit speaker
outputs to the high level input
connector as shown below. The
black wire (signal reference ground)
may or may not require a connection
to chassis ground - depending on
your particular installation.
Subwoofer (mono)
Typical Bridged Wiring
(4 ohms minimum)
2 Speakers (stereo)
Typical Stereo Wiring
(2 ohms minimum)
HI-LEVEL INPUT CONNECTION
Grey = Right (+)
Grey/Black = Right (-)
Black = Ground
White/Black = Left (-)
White = Left (+)
CAUTION
Do not use both low and high level inputs at the same time - connect only one or the other.
XPR522 speaker connections shown