Reciever shuts off after turning the volume up

hello ,i strongly suspect the units protect circuit is sensing a speaker problem.Listen to each speaker to see if all the drivers(woofer,midrange,tweeter) are working and if so are any of them sounding distorted.When an amp is damaged it wont play at all,sounds like a bad speaker to me.

Hello,
It sounds like either your speakers are too large for the receiver to power, or the way that the speakers are hooked up is incorrect. I would need some more information to be able to better determine where the issue is.

Do you have talkback installed? It my be too loud and causing feed back. Back the mic gain down if so.

Could also be improper mic wiring. If you use a mic that is wired for a different radio, it could just cause a hum, buzz or squeal.

Another thing that can cause a hum, buzz or squeal is a faulty volume and or squelch knob depending on the radio.

• Turn down or disable talk back.
• If you cannot turn off or disable talk back, lower mic gain.
• Try a different mic that you know is wired for cobra.
• Play with volume and squelch knobs while TX and see if it stops at all. If it does replace knob.
  

Hi,

Try less speakers.
The impedance will be to low for this amp.

Regards,
Gerard

The receiver may be too under powered for your speakers or the speaker ohm's may not be matched for your amp.

The reason it is shutting off is likely because the amp is becoming overloaded. At lower volumes the amp can handle the load of the speakers, but at higher volumes the power supply of the amp can't keep up with the power demand the speakers are pulling.

If you were previously able to turn the reciever high without turning off, then there is likley something wrong with the amp or possibly a blown speaker.

Try measuring the resistance of the speakers if you have access to a multimeter. They should normally read 8 ohms for home speakers, but some common home speaker impedances in order from (I'm assuming) most common to least common are are 8, 4, 2(bose), and sometimes 10 or 12 ohms. The lower the number of ohms, the more power the amp will need to put to the speakers and the more chance you could be overloading your amp.

Check the ohm load for the reciever, then check to see what ohms are of the speakers. make sure they match. 4ohm to 4ohm, 8ohm to 8ohm. If unit feels hot when it shuts off, it's a themal overload, put in to keep the reciever from getting damaged. It comes back on when cool right? Overload could be on its way out and shutting down at a lower temp too

unplug the reciever for at least 15 minutes. then replug in all of your speakers making sure there is no bare wire showing. if the reciever doesnt ower on replace the fuse inside(make sure unplugged from wall)

It does that because there is a safety feature in all the newer devices. If your system is turned up to high you would blow your audio outputs or speakers. That's why it shuts off.

i have the same problem with a onkyo tx ds494

try using the analog mine had a problem with the dac. have any questions email me at [email protected]