Quantum Audio QCA4400 Trouble Shooting The System, Specifications, QCA2500D, QCA3500D, QCA4500D

TROUBLE SHOOTING THE SYSTEM

We have put together this trouble-shooting guide if you experience problems after installing the amplifier. Please keep in mind that the majority of problems incurred are caused by improper installation and not the equipment itself. In addition, there are many components in the system that could cause various signal problems such as inducted electrical noise and engine noise.

Before you can properly address the problem, you must first find the component that is causing the problem. This will take patience and a process of elimination.

LOOK FOR…..	SOLUTION
No Output
Blown fuse	Replace
Bad RCA Cable(s)	Replace
+12V at power terminal	Check connection
+12V at remote terminal	Check connection
Grounding point clean and tight	Check for ground w/meter
Head Unit’s fader not in center position	Set to center position
Master & Slave settings	Confirm correct setting
Low Output
Check level adjustments	Re-adjust
Bad RCA cable(s)	Replace
Improper level matching	Re-adjust
Master & Slave settings	Confirm correct setting
Engine Noise
Grounding points are clean and tight	Check for ground w/meter
Ground all components at same point	Ground at same point
Try different grounding point	Change for better ground
Bad RCA cable(s)	Replace
Use High Quality shielded RCA cables	Rejects inducted noise
Low Vehicle charging system and/or battery	Fix and/or replace
Red Protection L.E.D. illuminated
Speaker short	Check speakers connection
	for short circuit
Speaker grounding out	Make sure speaker wires
	Do not touch chassis ground
Impedance too low	Check speaker impedance
Overheating	Check mounting location
	for Adequate air circulation

SPECIFICATIONS

Input Voltage @ 11 - 14.4 VDC: QCA4400
Dynamic Power	2500 watts
4 ohm	4 x 400 watts
4 ohms Bridged	2 x 1200 watts
2 ohm	4 x 700 watts
Frequency Resp.	10Hz-20Khz
S/N Ratio (A-weight)	>90dB
Low Input Level	200mV. - 5.8 V
Crossover Type	Hi/Low Pass
Crossover Freq. (Lowpass)	55Hz - 400Hz
Crossover Slope	12db per octave
Bass EQ.	18dB @ 45Hz
Size (L x W x H)	14.75 x 9.75 x 2.6
Fuse Rating	2 x 25 amp

Input Voltage @ 11 - 14.4 VDC:	QCA2500D	QCA3500D	QCA4500D
Dynamic Power	2500 watts	3500 watts	4500 watts
4 ohm	1 x 625 watts	1 x 750 watts	1 x 875 watts
2 ohm	1 x 1500 watts	1 x 1750 watts	1 x 2250 watts
1 ohm	1 x 2500 watts	1 x 3500 watts	1 x 4500 watts
Frequency Resp.	20Hz - 250Hz	20Hz - 250Hz	20Hz - 250Hz
S/N Ratio (A-weight)	>90dB	>90dB	>90dB
Low Input Level	246mV - 5.9V	246mV - 5.9V	246mV - 5.9V
Crossover Type	Low Pass	Low Pass	Low Pass
Crossover Freq. (Lowpass)	40Hz - 150Hz	40Hz - 150Hz	40Hz - 150Hz
Crossover Slope	18dB per octave	18dB per octave	18dB per octave
Bass EQ.	18dB @ 45Hz	18dB @ 45Hz	18dB @ 45Hz
Subsonic Filter	20Hz - 50Hz	20Hz - 50Hz	20Hz - 50Hz
Remote Control Included	optional	optional	optional
Fuse Rating	2 x 20 amp	2 x 30 amp	3 x 30 amp

Due to continuous improvment of the product the specifications are subject to change without notice.

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