sub amp keeps blowing

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: January 20, 2008 at 11:05 AM / IP Logged

Remove the amp from the vehicle and take it to a good shop for testing to find out what's really wrong with it. When output transistors blow there is generally a reason that has nothing to do with the transistor itself, and until you discover that you are wasting your time and money.

I am not too sure a Kenwood amp is even worth fixing to be honest with you, so be sure to weigh the cost of repairs VS the cost of a new amp.

And no, the power ratings of the gear has nothing to do with anything.

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Alpine Guy

Platinum - Posts: 2,478

Joined: October 18, 2003

Location: Canada

Posted: January 20, 2008 at 4:37 PM / IP Logged

The thing with those power supply transistors is that they all must be replaced at the same time from the exact same batch of transistors, they all went through the same abuse, so they all need to be replaced no matter what unfortunately. But theres so much more to be tested to be sure. You could try replacing them all and see what happens, or you could get it repaired professionally.

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

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i am an idiot

Platinum - Posts: 13,667

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 20, 2008 at 5:46 PM / IP Logged

He has no problem with the power supply transistors. And his outputs are single outputs. I am wondering if he used heat sink compound and tightened the screws down that hold the outputs in place.

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mmcelroy

Member - Posts: 6

Joined: January 15, 2008

Location: Georgia, United States

Posted: January 21, 2008 at 6:08 PM / IP Logged

Great news! I believe I have fixed the amp, it's been running perfectly since this morning.

I think I underestimated the need to properly attach the transistors to the heat sink. This time when I replaced the transistors and reattached the circuit board to the amp's shell I added thermal compound to all of the transistors and made sure that they were all securley fastened down.

Thanks for everyone's help.

Matt

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sub amp keeps blowing

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