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) | ||
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| GND wire not connected | Check connection to ground | |
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| Fuse(s) blown | Replace fuse(s) | |
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Unit has power - LED is | Speaker wires not connected | Check connections at speakers | ||
green (but no sound) |
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Volume turned all the way down | Increase volume level at head unit | |||
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| One or more speaker wires touching each | Insulate all bare speaker wires from each | |
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| other or touching chassis ground | other and chassis ground | |
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| Speaker(s) defective or damaged | Check/replace speaker(s) | |
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| Input signal not connected | Check high or low level inputs for proper | |
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| connection | |
Unit blows fuse(s) | Incorrect fuse rating | Use fuse(s) with correct rating | ||
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| +12V wire touching chassis ground | Check for pinched wire | |
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| Speaker(s) defective or damaged | Check/replace speaker(s) | |
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Engine noise | Bad ground connection | Make sure amplifier is grounded to clean | ||
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| bare metal | |
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| Signal ground loop or RFI (radio frequency | ||
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| 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 | ||
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| Speaker(s) defective or | Check/replace speaker(s) | |
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| damaged internally (shorted) |
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| XPA2100 | Speaker load less than 2 ohms (stereo) | Adjust speaker load - amplifier will not | |
| XPA4100 | Speaker load less than 4 ohms (bridged) | operate at less than 4 ohms when bridged | |
| XPA6100 | Speaker load less than 2 ohms | Adjust speaker load - amplifier will not | |
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| operate at less than 2 ohms | |
Distorted audio output | Incorrect input signal type or | Check connections and reduce/adjust | ||
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| input level too high | input level | |
Low audio output | Incorrect input signal type or | Check connections and increase/adjust | ||
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| input level too low | input level | |
Weak bass | Speaker(s) are wired out of phase | Check (+) and | ||
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| (Observe correct polarity) | |
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