Amp Power Cables Wired in Reverse Polarity

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damofinefidelit

Member - Posts: 7

Joined: July 30, 2019

Location: Australia

Posted: July 30, 2019 at 1:57 AM / IP Logged

I connected the power inputs in reverse and my amplifier made a popping sound and smoke came out is there a chance I can save the amplifier?

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damofinefidelit

Member - Posts: 7

Joined: July 30, 2019

Location: Australia

Posted: July 30, 2019 at 2:01 AM / IP Logged

It's a Response cat.AA-0435 4x100wrms mosfet power amp

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: July 30, 2019 at 8:15 PM / IP Logged

If it was properly fused it would not have hurt it much. There is a diode across power and ground, this is known as a reverse polarity protection diode. It may have only shorted that diode and burnt a trace on the circuit board. Have you opened it up to see if you can see what may have smoked?

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damofinefidelit

Member - Posts: 7

Joined: July 30, 2019

Location: Australia

Posted: July 31, 2019 at 7:59 PM / IP Logged

I found that two mosfets the center terminals have become disconnected from the pcb and two ceramic components have also become disconnected as well if I could send pics of these components I would

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: August 04, 2019 at 12:49 PM / IP Logged

Replace it.

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forbidden

Platinum - Posts: 5,352

Joined: November 01, 2003

Location: Alberta, Canada

Posted: August 04, 2019 at 2:05 PM / IP Logged

If the magic smoke that makes it work has been released, you 100% need to replace the amplifier.

Top Secret, I can tell you but then my wife will kill me.

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damofinefidelit

Member - Posts: 7

Joined: July 30, 2019

Location: Australia

Posted: August 06, 2019 at 2:05 AM / IP Logged

Thank you

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damofinefidelit

Member - Posts: 7

Joined: July 30, 2019

Location: Australia

Posted: September 30, 2019 at 7:27 AM / IP Logged

Thanks mate will try that out is there any reason one of the legs on a most amplifier chip would have blown off the pcb

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i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 30, 2019 at 3:05 PM / IP Logged

Because you connected it backwards with too large or no fuse.

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