Quantum Audio QS4250, QS2150, QS4150, QS1500D, QS2250 Trouble Shooting the System, Look for Solution

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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

Low Output

 

 

Check level adjustments

 

Re-adjust

Bad RCA cable(s)

 

Replace

Improper level matching

 

Re-adjust

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

 

 

(Min 2 ohm Stereo, 4 Mono)

Overheating

 

Check mounting location

 

 

for Adequate air Circulation

 

 

Speaker impedance too low

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Contents Mosfet Power Amplifiers Introduction Safety Precautions Features and Benefits Line Out Power FusingAdjustable Input Sensitivity Remote Turn-onMounting Location Power Connections Connect the amplifier to the cars batterySignal & Speaker Connections QS2150 & QS2250 Connections Stereo ModeQS2150 & QS2250 Connections Mono Mode QS4150 & QS4250 Connections 4 Channel Mode QS4150 & QS4250 Connections 3 Channel Mode QS4150 & QS4250 Connections 2 Channel Mode QS1500D Connections High Level Connections Optional TWO Channel Connections Common Ground RadioGray Right + Brown Not Used Black Ground Remote Bass Control Module QS1500D Adjusting the Crossover and Bass Fine Tune the SystemTrouble Shooting the System Look for SolutionSpecifications QS4150Limited Warranty