Question about AudioBahn A8000T Car Audio Amplifier

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My A8000t amps red protection light is on checked

My A8000t amps red protection light is on, checked all the fuses and they're all ok what else could it be and how much would it cost to repair?

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When ever the amp stays in RED protection mode with out any speakers hooked up to it, YOUR amp has internal damage some where. Can't tell you how much to fix, Could be cheap or not worth it. Talk to your local electronic repair, would be a good start.

Posted on May 27, 2010

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Posted on Jan 02, 2017

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Kenwood kac 628 red light comes on and no audio output


The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

5th.if none of these turns the protect mode off, it may be an internal fault.

you may have blown transistors and it is a tricky job to repair and costly.

Jan 28, 2013 | Kenwood KAC-628 Car Audio Amplifier

2 Answers

I have an a8000t amp with the protection light on, is the amp broke?


Disconnect the speaker wires then the power and ground completly. Then power up the amp and if the protection light turn on the you have an interanl problem if not then you ohm is problably to low and causing the amp to go into protections.

-david

Nov 09, 2010 | AudioBahn A8000T Car Audio Amplifier

1 Answer

Amp not working


I had a similar problem with a pyle amp. try to disconnect the speakers and turn it on if the protect light doesn't come on then you might have blown something in your amp and it needs to be repaired. For my situation it was a blown resistors and only 1 channel worked. If you don't have soldering experience then I wouldn't bother trying to fix yourself, an unsteady hand can ruin your repair.

Mar 26, 2010 | AudioBahn A8000T Car Audio Amplifier

1 Answer

Amp keeps cutting off


Do you have heavy enough gauge wire supplying B+ to amp.Big amps draw a lot of current and require very heavy gauge wire. The longer the run the heavier the gauge needed.

Apr 20, 2009 | AudioBahn A8000T Car Audio Amplifier

1 Answer

I have an audiobahn A8000t amp with the protection light on


There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure.
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.
Note:
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.

Dec 30, 2008 | AudioBahn A8000T Car Audio Amplifier

1 Answer

Audiobahn a8000t problem


If the protect LED is lit, the amp probably has shortedoutput transistors. To eliminate other possible causes, read throughthe following page:

Amp in Protect Mode - Troubleshooting

Let me know if you have any other questions.

Nov 23, 2008 | AudioBahn A8000T Car Audio Amplifier

2 Answers

Protection Light On


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you didn't fry speakers as well. Please check speakers impedance. A thumbs up would be greatly appreciated if this answer is helpful to you

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Nov 26, 2006 | AudioBahn A8000T Car Audio Amplifier

1 Answer

Protection mode


Driver ICs or transistors,op-amps that create the idle bias circuit,the protection circuit, the power supply. You should have a schematic of this unit and know how to check the solid state devices for shorts. GOOD lUCK

Jul 31, 2006 | AudioBahn A8000T Car Audio Amplifier

1 Answer

Solution


Sounds like you have shorted output transistors or IC'S There is one test is to disconnect all the speakers and see if they still blow. If they do then you need to have the amp fixed or replaced. If they dont blow try connecting up each speaker till the unit blows the fuse asjust maybe you blew out a crossover or a speaker or two?? If you have an active type crossover then I would check that device as well. Good Luck

Apr 22, 2006 | AudioBahn A8000T Car Audio Amplifier

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