Dual XPR owner manual Troubleshooting, Problem, Cause, Action, Unit blows fuses

Troubleshooting

Problem	Cause	Action
	+12V wire not connected or incorrect voltage	Check connections for proper voltage
Unit will not turn on	REM wire not connected or incorrect voltage	(11~16VDC)
(no power LED indicator)	GND wire not connected	Check connection to ground
	Fuse(s) blown	Replace fuse(s)
	Speaker wires not connected	Check connections at speakers
	Volume turned all the way down	Increase volume level at head unit
Unit has power - LED is	One or more speaker wires touching each	Insulate all bare speaker wires from each
	other or touching chassis ground	other and chassis ground
blue (but no sound)
	Speaker(s) defective or damaged	Check/replace speaker(s)
	Input signal not connected	Check high or low level inputs for proper
		connection
	Incorrect fuse rating	Use fuse(s) with correct rating
Unit blows fuse(s)	+12V wire touching chassis ground	Check for pinched wire
	Speaker(s) defective or damaged	Check/replace speaker(s)
	Bad ground connection	Make sure amplifier is grounded to clean
		bare metal
Engine noise
	Signal ground loop or RFI (radio frequency	Re-route RCA cables from existing high
	interference)	current wiring
	One or more speaker wires touching each	Insulate all bare speaker wires from each
	other or touching chassis ground	other and chassis ground
LED illuminates red	Speaker(s) defective or	Check/replace speaker(s)
(protect mode)	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)

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