what's wrong with my amp

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cdub

Member - Posts: 1

Joined: June 09, 2004

Location: United States

Posted: June 09, 2004 at 10:36 AM / IP Logged

My amp quit working a week ago, I believe it has no output. It makes this hissing or whining sound whenever it is on, but no sound from my subs. The red LED still comes on and I checked the wiring and fuses and it all looks good. The amp is a Punch Power 1500bd and they are pushing two Kicker L7 12" subs, and I have had the system for about a year.

kgerry

Platinum - Posts: 3,455

This member consistently provides reliable information

Joined: February 07, 2004

Location: Saskatchewan, Canada

Posted: June 09, 2004 at 10:52 AM / IP Logged

the whining sound you hear is probably an oscillation coming from the power supply.... i tend to suspect that you've blown the FET's in the power supply, if you had blown the outputs you'd know it ( smoking, fuse blowing, etc )

Kevin Gerry

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Owner/Installer

Classic Car Audio

since 1979

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: June 09, 2004 at 11:08 AM / IP Logged

I agee. Sounds like the old input voltage vs sensitivity mis-match. Or it's possible you have fried the voice coils in the speakers and they are frozen.

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what's wrong with my amp

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