Amp cuts out?

Mafiakiller · 11-30-2009, 11:27 AM

I have a '96 Beretta with stock battery, and alternator...my problem is that my amp and/or HU cuts off at a certain volume. I have owned louder systems before so the volume isnt that loud.

I do own a low quality system so that could be one of the reasons.

Alpine HU (i think 9984)
2 12'' Sony X-shits lol
Dual amplifier (also is mounted on a bandpass box)

I am pretty sure that my installation is fine so i dont think thats the issue

thanks

Mafiakiller · 11-30-2009, 01:00 PM

also when the amp and or HU cuts out it turns right back on...it plays fine when im guessing a "comfortable" volume for the amp lol

GradeA_TireFryer · 11-30-2009, 02:44 PM

i would guess you are clipping(shorting out) one of the speakers connected to the headunit. have you upgraded them? one might of the leads mght be touching metal when turned up?, or voice coil is shorting out putting head unit into protect and turning off.

luke81 · 11-30-2009, 02:58 PM

When it 'cuts off' are you just losing the sound or is the unit literally turning off?

Mafiakiller · 11-30-2009, 11:13 PM

Quote:

Originally Posted by luke81

When it 'cuts off' are you just losing the sound or is the unit literally turning off?

everything cuts off then it turns on by itself a second later

Mafiakiller · 11-30-2009, 11:15 PM

Quote:

Originally Posted by GradeA_TireFryer

i would guess you are clipping(shorting out) one of the speakers connected to the headunit. have you upgraded them? one might of the leads mght be touching metal when turned up?, or voice coil is shorting out putting head unit into protect and turning off.

i upgraded Polks in the front but it was doing it before when i had stock speakers

Kyleisme · 11-30-2009, 11:24 PM

so everything electrical shuts off? does the amp get hot?

luke81 · 12-01-2009, 10:16 AM

Ah, so if the HU is shutting off it's turning the amp off. Pop out your hu and meter the power, make sure you're not getting a massive voltage loss at the HU. Check both the constant and ignition. Then jump a new ground onto a nice solid clean metal surface instead of the harness. Check and be sure none of the pins in the harness have worked their way loose too, I've see that many times.

GradeA_TireFryer · 12-01-2009, 05:20 PM

Quote:

Originally Posted by luke81

Ah, so if the HU is shutting off it's turning the amp off. Pop out your hu and meter the power, make sure you're not getting a massive voltage loss at the HU. Check both the constant and ignition. Then jump a new ground onto a nice solid clean metal surface instead of the harness. Check and be sure none of the pins in the harness have worked their way loose too, I've see that many times.

Yep, those pins will waste a lot of your time figuring that out, always run a good ground to chasis metal. i would make sure none of the non used speaker leads out of the radio are not touching, bell cap none used wires!

run a temp wire from battery to power radio and see if it still does it - this will rule out power in harness.

alphabets · 12-01-2009, 05:40 PM

Quote:

Originally Posted by GradeA_TireFryer

run a temp wire from battery to power radio and see if it still does it - this will rule out power in harness.

This saved me like a million hours of bullshit a couple years ago.

The problem is more than likely at your headunit, or before. Just check for major voltage drops at various places.

Mafiakiller · 12-02-2009, 10:19 AM

Quote:

Originally Posted by luke81

Ah, so if the HU is shutting off it's turning the amp off. Pop out your hu and meter the power, make sure you're not getting a massive voltage loss at the HU. Check both the constant and ignition. Then jump a new ground onto a nice solid clean metal surface instead of the harness. Check and be sure none of the pins in the harness have worked their way loose too, I've see that many times.

well i have no equipment to test the power for the HU....and when i did my ground i am more than positive that i put a nice clean surface for the ground....and what you mean by the pins? are you talking about the pins that holds the HU in place?

the727kid · 12-02-2009, 10:40 AM

Does the HU cut off or just the sound?

luke81 · 12-02-2009, 10:42 AM

The pins in the wiring harness. Even a cheapo wal-mart meter will do the job.

J@meson · 12-02-2009, 04:23 PM

monitor your voltage... It may be dropping low enough to make the headunit and amp turn off...

My Honda Is Slow · 12-02-2009, 08:48 PM

exactly. my alpine does the exact same thing. i think they have built in voltage drop protectors...when its idling and i have it turned up, the alt cant keep up and my battery sucks cause its cheapo 3 year old advance auto batt. but it will shut down the head unit, in turn shutting off the amps....upgrade your alt and battery.

Quote:

Originally Posted by J@meson

monitor your voltage... It may be dropping low enough to make the headunit and amp turn off...

11-30-2009, 11:27 AM	#1 (permalink)
Mafiakiller Ballin Beretta Car: '96 Beretta My TRGarage Tampa : 242208914	Amp cuts out? I have a '96 Beretta with stock battery, and alternator...my problem is that my amp and/or HU cuts off at a certain volume. I have owned louder systems before so the volume isnt that loud. I do own a low quality system so that could be one of the reasons. Alpine HU (i think 9984) 2 12'' Sony X-shits lol Dual amplifier (also is mounted on a bandpass box) I am pretty sure that my installation is fine so i dont think thats the issue thanks

11-30-2009, 01:00 PM	#2 (permalink)
Mafiakiller Ballin Beretta Car: '96 Beretta My TRGarage Tampa : 242208914	also when the amp and or HU cuts out it turns right back on...it plays fine when im guessing a "comfortable" volume for the amp lol

11-30-2009, 02:44 PM	#3 (permalink)
GradeA_TireFryer All American, rice eater! Car: 70 chevelle, 07 F150 Lariate My TRGarage : 111612509	i would guess you are clipping(shorting out) one of the speakers connected to the headunit. have you upgraded them? one might of the leads mght be touching metal when turned up?, or voice coil is shorting out putting head unit into protect and turning off.

11-30-2009, 02:58 PM	#4 (permalink)
luke81 Registered User Car: My TRGarage Palm Harbor : 48653213	When it 'cuts off' are you just losing the sound or is the unit literally turning off?

11-30-2009, 11:24 PM	#7 (permalink)
Kyleisme Registered User Car: My TRGarage : 12508686	so everything electrical shuts off? does the amp get hot?

12-01-2009, 10:16 AM	#8 (permalink)
luke81 Registered User Car: My TRGarage Palm Harbor : 48653213	Ah, so if the HU is shutting off it's turning the amp off. Pop out your hu and meter the power, make sure you're not getting a massive voltage loss at the HU. Check both the constant and ignition. Then jump a new ground onto a nice solid clean metal surface instead of the harness. Check and be sure none of the pins in the harness have worked their way loose too, I've see that many times.

12-02-2009, 10:40 AM	#12 (permalink)
the727kid Registered User Car: My TRGarage : 62268009	Does the HU cut off or just the sound?

12-02-2009, 10:42 AM	#13 (permalink)
luke81 Registered User Car: My TRGarage Palm Harbor : 48653213	The pins in the wiring harness. Even a cheapo wal-mart meter will do the job.

12-02-2009, 04:23 PM	#14 (permalink)
J@meson N20ZUKI Car: My TRGarage Clearwater : 853914288	monitor your voltage... It may be dropping low enough to make the headunit and amp turn off...