Interfire Audio A2200.2, A1000.2, A500.4, A300.2, A700.4, A700.2 Symptom Probable Cause Solution

This section provides you with a catalog of amplifier symptoms and their probable causes and solutions. Before you consult this listing, make sure the vehicle's electrical system is working properly by verifying that other electrical items (e. g. headlights, windows, etc.)

Still function correctly.

SYMPTOM	PROBABLE CAUSE	SOLUTION
No Audio	Low or N.C Remote	Check remote turn-on voltage at
	Turn-on connections	amp and head unit
	Blown Fuse	Replace with new fast-blow fuse
	Power wires not connected	Check butt splices or solder joints
		Check ground and battery
		connections
	Blown or non speakers	Use VOM or DVM to measure speaker
	connected	coil
		impedance; check speaker wiring
		connections
Distorted Audio	Input Sensitivity not set	See adjustment procedure and check
	properly	each step;
	or damaged speaker cones	Inspect each speaker for damage
		and repair or replace suspected
		component
	Low turn-on voltage	Refer to head unit owner's manual
Audio Level Low	Mute circuit on head	Check electrical system for low
	unit is on.	voltage;
		Check ground connection
Audio Lacks	Speakers wired with wrong	Check polarity of wires from
	polarity, causing	amplifiers to each speaker as defined
	cancellation of bass	by the system design
	frequencies	Check battery voltage at amplifier
		during operation
External Fuse	Incorrect wiring or short	Refer to electrical installation and
Blowing	circuit	check each installation step
Whining noise	Amplifier is picking	Install an in-line noise filter on the
on audio with	up alternator noise	head unit's power wire; Check
engine running		alternator routing diodes or voltage
		regulator for proper operation. Check
		all grounds , battery voltage, and
		RCA cables
Ticking noise on	Amplifier is picking up	Check RCA audio cable; Install an
audio with	radiated spark noise	in-line noise filter on the head unit's
engine		power wire. Check spark plug wires.
running

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