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:
Dynamic Power
4 ohm
4 ohms Bridged
2 ohm
Frequency Resp.
S/N Ratio (A-weight)
Low Input Level
Crossover Type
Crossover Freq. (Lowpass)
Crossover Slope
Bass EQ.
Size (L x W x H)
Fuse Rating
Input Voltage @ 11 - 14.4 VDC:
Dynamic Power
4 ohm
2 ohm
1 ohm
Frequency Resp.
S/N Ratio (A-weight)
Low Input Level
Crossover Type
Crossover Freq. (Lowpass)
Crossover Slope
Bass EQ.
Subsonic Filter
Remote Control Included
Fuse Rating
13 14
QCA4500D
4500 watts
1 x 875 watts
1 x 2250 watts
1 x 4500 watts
20Hz - 250Hz
>90dB
246mV - 5.9V
Low Pass
40Hz - 150Hz
18dB per octave
18dB @ 45Hz
20Hz - 50Hz
optional
3 x 30 amp
QCA4400
2500 watts
4 x 400 watts
2 x 1200 watts
4 x 700 watts
10Hz-20Khz
>90dB
200mV. - 5.8 V
Hi/Low Pass
55Hz - 400Hz
12db per octave
18dB @ 45Hz
14.75 x 9.75 x 2.6
2 x 25 amp
QCA2500D
2500 watts
1 x 625 watts
1 x 1500 watts
1 x 2500 watts
20Hz - 250Hz
>90dB
246mV - 5.9V
Low Pass
40Hz - 150Hz
18dB per octave
18dB @ 45Hz
20Hz - 50Hz
optional
2 x 20 amp
QCA3500D
3500 watts
1 x 750 watts
1 x 1750 watts
1 x 3500 watts
20Hz - 250Hz
>90dB
246mV - 5.9V
Low Pass
40Hz - 150Hz
18dB per octave
18dB @ 45Hz
20Hz - 50Hz
optional
2 x 30 amp
Due to continuous improvment of the product the specifications are subject to change without notice.
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