Very perplexed.....Help .....please......anyone.....

[rodekill 10+ year member]

Well I took the amp(the Alpine) and had it bench tested, it is dead. But the sub amp is dead too. Now my question is

 

[rodekill 10+ year member]

Well I'm back in car stereo Hell, I installed a new amp, A Punch 400-4 10 days ago, and now this amp is shutting off if I turn it up past 18.........aaaaarrrrrrrgggggggg!!!!!

But when I turn the radio back down it comes back on. I'm really tiring of this crap.

 

[jsluss17 10+ year member]

are they sharing a ground? try to run them on separate grounds

 

[maylar 10+ year member]

Well I'm back in car stereo Hell, I installed a new amp, A Punch 400-4 10 days ago, and now this amp is shutting off if I turn it up past 18.........aaaaarrrrrrrgggggggg!!!!!But when I turn the radio back down it comes back on. I'm really tiring of this crap.

You either have a bad power connection (batt or ground), or your output is shorted. I had a similar problem and discovered I had pinched a speaker wire to the car chassis.

 

[rodekill 10+ year member]

Checking Impedance of the speakers(at the amp) can detect that, right? This could be what ultimately what killed the Alpine.

 

[matt_bennett05 10+ year member]

If I read it right you said you had a 12 gauge ground? Man if that's what you really meant that's a serious problem.

 

[GLN305 10+ year member]

This

If I read it right you said you had a 12 gauge ground? Man if that's what you really meant that's a serious problem.

 

[maylar 10+ year member]

Checking Impedance of the speakers(at the amp) can detect that, right? This could be what ultimately what killed the Alpine.

Disconnct all speaker wires and measure across each one and also to ground. In my case, I had one speaker wire squished to ground. Amp went into protect mode at about 1/2 volume.

 

[rodekill 10+ year member]

If I read it right you said you had a 12 gauge ground? Man if that's what you really meant that's a serious problem.

Sorry it's not 12 ga. it is 8 ga