User manual Dual XPA4100

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XPAꢀSERIESꢀOPERATION  
Troubleshooting  
Problem  
Cause  
Action  
Unitꢀwillꢀnotꢀturnꢀon +12V wire not connected or incorrect voltage Check connections for proper voltage  
noꢀpowerꢀLEDꢀindicator) REM wire not connected or incorrect voltage (11~16VDC)  
(
GND wire not connected  
Fuse(s) blown  
Check connection to ground  
Replace fuse(s)  
Unitꢀhasꢀpowerꢀ-ꢀLEDꢀisꢀSpeaker wires not connected  
Check connections at speakers  
Increase volume level at head unit  
greenꢀ(butꢀnoꢀsound)  
Volume turned all the way down  
One or more speaker wires touching each  
other or touching chassis ground  
Insulate all bare speaker wires from each  
other and chassis ground  
Speaker(s) defective or damaged  
Input signal not connected  
Check/replace speaker(s)  
Check high or low level inputs for proper  
connection  
Unitꢀblowsꢀfuse(s)  
Engineꢀnoise  
Incorrect fuse rating  
12V wire touching chassis ground  
Use fuse(s) with correct rating  
Check for pinched wire  
+
Speaker(s) defective or damaged  
Bad ground connection  
Check/replace speaker(s)  
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  
LEDꢀilluminatesꢀred One or more speaker wires touching each  
Insulate all bare speaker wires from each  
other and chassis ground  
(
protectꢀmode)  
other or touching chassis ground  
Speaker(s) defective or  
Check/replace speaker(s)  
damaged internally (shorted)  
XPA2100 Speaker load less than 2 ohms (stereo)  
XPA4100 Speaker load less than 4 ohms (bridged)  
Adjust speaker load - amplifier will not  
operate at less than 4 ohms when bridged  
XPA6100 Speaker load less than 2 ohms  
Adjust speaker load - amplifier will not  
operate at less than 2 ohms  
Distortedꢀaudioꢀoutput Incorrect input signal type or  
input level too high  
Check connections and reduce/adjust  
input level  
Lowꢀaudioꢀoutput  
Weakꢀbassꢀ  
Incorrect input signal type or  
input level too low  
Speaker(s) are wired out of phase  
Check connections and increase/adjust  
input level  
Check (+) and (-) speaker connections  
(
Observe correct polarity)  
Dual Electronics Corp.  
Toll Free: 1-866-382-5476  
www.dualav.com  
©
2008 Dual Electronics Corp.  
NSA0208-V02  

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