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Why won't my amplifier shut off - Car Audio & Video

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Because it is connected directly to the battery and not a switched +12 volts.

Posted on Nov 28, 2014

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Posted on Jan 02, 2017

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2 Answers

Roland Cube 60 Amp


The power relay must be replaced or checked thats where the humming noise come from.

Jul 05, 2013 | Audio Players & Recorders

1 Answer

Amplifier gets power but won't push my subs


check - and + wires then make sure that all ohm and watts are in the same range od the subs and amp

Feb 08, 2013 | Audio Players & Recorders

1 Answer

Amp won't power on


It sound like the main power amp has failed. Look at whatever is on the big heatsink as to the cause. As with any device from "friends" it could be that someone has tried to fix a fault and made a mess. So look carefully at the soldering to any of it's parts.

Jan 03, 2013 | Technics Audio Players & Recorders

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Pioneer vsx82txs turn volume way up and shuts off. phase control flashes,now it won't turn on at all. could powered subs destroy it?


One of your speakers must
be internally shorted. Go into the MMAC menu and turn off one speaker at a time
until you can volume up without having a receiver shut down. DO NOT DISCONNECT
1 SPEAKER AT A TIME OR YOU WILL DESTROY THE AMPLIFIER STAGE OF YOUR RECEIVER!

Mar 26, 2012 | Audio Players & Recorders

1 Answer

When I try to turn the amp on, all I get is a flashing red light flashing beside stand by. Nothing comes up on the screen and nothing seems to work. It's always worked fine before, today it shut off on...


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Mar 14, 2012 | Onkyo Audio Players & Recorders

1 Answer

Everything wired right but light on amp won't come on. Took it apart an not burned anywhere. What's the problem an how to fix it?


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

Jul 22, 2011 | SPL Audio Phantom DK2-2400 Car Audio...

1 Answer

Won't turn on just the notice push power protector comes on


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

Jul 19, 2011 | Sony DAV-HDX500 System

2 Answers

When i turn up the volume my amp shuts down i turn it down and it comes back on. I have a crossfire vr1000d what am i doing wrong?


Hi,
Is the protect light in your amplifier turns on when it shuts down? If yes, then your amplifier lacks voltage. The reason why it goes on protect mode is, the amplifier is needing an amount of voltage from your car, since your car cannot provide that amount of voltage your amplifier is not getting anything, instead of getting voltage to produce watts its getting minimum voltage & producing heat, to save itself it goes on protect mode so the incoming power shuts off & cools the amplifier.
Example:
Your on vol 40, amplifier is working fine, when you turn it up to vol 50 your amplifier shuts of, then you put it back to vol 40 & your amplifier turns back on.
At vol 40 your voltage is 12v or above. but in vol 50 your voltage drops to 11 & below.

Check your battery or alternator if they are giving enough voltage


Hope this helps your inquiry. Have a blessed weekend.

Apr 24, 2011 | Crossfire Car Audio & Video

1 Answer

Denon AVR-4802R automatically shuts off in multi-zone mode


i had the volume of the multi-zone tuned too high and was attenuating it in an external control box. Once i took the multi-zone volume down to -25db, the problem went way. My main zone was operating around -35db so did not have the problem.

Nov 23, 2008 | Denon AVR-4802 Receiver

1 Answer

I have problem with my mono amplifier


Amplifiers have thermal protection. They will typically shut down at ~180F. If your amp is shutting down after running it hard for 20-30 minutes, you may not have the correct load impedance (speakers wired incorrectly).

If it overheats as soon as it's switched on (no audio), the amp may be in need of repair.

Jun 21, 2008 | Ultra Linear UL-2200D Car Audio Amplifier

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