Pioneer avh1400dvd shuts-off when loud - Ford Mustang Forum
 
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post #1 of 5 (permalink) Old 05-22-2012 Thread Starter
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Pioneer avh1400dvd shuts-off when loud

I installed the avh1400dvd about a month ago and love it. Problem is when I want to play it load at 17 on the volume scale of (0-40) it shuts off and comes back on. I have a shaker 500 and only changed the head unit. I called crutchfield and the tech said it is a protection system that detects distortion. I have adjusted the subs to hardly any bass 50hrz and it still shut-off. I have shut off the subs and its ok. It just can't handle the subs. Is it the factory amps or the subs? Any help or advice would be very helpful, thanks guys. I just don't get it.

P.S. I think it sounds great loud and not distorted.


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post #2 of 5 (permalink) Old 05-24-2012
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Does the radio head unit shut off?

Or do you mean the head unit stays on and all of the sound coming from the radio shuts off, uncluding normal speakers and subs?

Or, do you mean that the radio stays on, the sound stays on to the normal speakers and only the subs shut off?

If only the subs turn off, that sounds like the sub amplifier is getting either overloaded or overheated and activating the protection circuitry.

If the head unit stays on and all sound is shut off then the question is: how many amplifiers are you using? Do you have one amplifier powering all speakers? If so, it still sounds like the amp is activatiy protection circuit. If you are running the main speakers directly from the head unit and only using an amp to power the subs, then it sounds like the head unit amp can't handle the power draw from the main speakers.

If the entire head unit shuts off...well, that's something I've never seen before unless the protection circuitry is built in such a way as to power down the entire unit instead of dropping power to the internal amplifier.


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post #3 of 5 (permalink) Old 05-25-2012 Thread Starter
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Thanks for the response. The entire head unit shuts off for about 5 seconds and then comes back on. Its a stock shaker 500.

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post #4 of 5 (permalink) Old 05-26-2012
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I'm guessing you used a PAC or some other type of CAN bus adapter for the install. This rebooting is caused by the amps for your Shaker 500. When the volume is turned up past a certain threshold the amps will send a feed back signal to the head unit telling it to turn down the volume to the amps. This feed back signal will overload your CAN bus adapter and make it reboot causing your head unit to reboot. Been there done that. The fix is placing a simple diode on the amp turn on wire so the feed back signal is blocked. For my saga and a lot more info on this read this thread:

06 PAC C2R-FRD1 wiring harness help - MustangForums.com

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post #5 of 5 (permalink) Old 05-26-2012
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FWIW, I have had this unit in my '05 Frontier for over a year with no problems. Dan02 is likely on it with the amp feedback
Good luck
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