Mobile Power Amplifiers XPA2500 Manuals


XPA SERIES OPERATION
Troubleshooting
Problem
Cause
Action
Unit will not turn on
+12V wire not connected or incorrect voltage  Check connections for proper voltage
(no power LED indicator) REM wire not connected or incorrect voltage (11~16VDC)
GND wire not connected
Check connection to ground
Fuse(s) blown
Replace fuse(s)
Unit has power - LED is  Speaker wires not connected
Check connections at speakers
green (but no sound)
Volume turned all the way down
Increase volume level at head unit
One or more speaker wires touching each
Insulate all bare speaker wires from each
other or touching chassis ground
other and chassis ground
Speaker(s) defective or damaged
Check/replace speaker(s)
Input signal not connected
Check high or low level inputs for proper
connection
Unit blows fuse(s)
Incorrect fuse rating
Use fuse(s) with correct rating
+12V wire touching chassis ground
Check for pinched wire
Speaker(s) defective or damaged
Check/replace speaker(s)
Engine noise
Bad ground connection
Make sure amplifier is grounded to clean
bare metal
Signal ground loop or RFI (radio frequency  Re-route RCA cables from existing high
interference)
current wiring
LED illuminates red
One or more speaker wires touching each
Insulate all bare speaker wires from each
(protect mode)
other or touching chassis ground
other and chassis ground
Speaker(s) defective or
Check/replace speaker(s)
damaged internally (shorted)
Speaker load less than 2 ohms (stereo)
Adjust speaker load - amplifier will not
Speaker load less than 4 ohms (bridged)
operate at less than 4 ohms when bridged
Distorted audio output Incorrect input signal type or
Check connections and reduce/adjust input
input level too high
level
Low audio output
Incorrect input signal type or
Check connections and increase/adjust
input level too low
input level
Weak bass
Speaker(s) are wired out of phase
Check (+) and (-) speaker connections
(Observe correct polarity)
Dual Electronics Corp.
Toll Free: 1-866-382-5476
www.dualav.com
©2008 Dual Electronics Corp.
NSA0608-V01


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