Amp noise

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ace customs

Member - Posts: 25

Joined: September 15, 2004

Location: United States

Posted: April 07, 2005 at 11:33 PM / IP Logged

I just installed a brand new amp for a guy today. It sounded fine for like a min. then it started this repetitive very loud bumping noise and would not stop unless power was killed to the amp or deck. Does anyone know what the problem is.

Ace Customs

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: April 08, 2005 at 12:28 AM / IP Logged

Could be one of several things: bad amp ground, amp input gain way too high (most likely cause) or bad RCA input cables.

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ace customs

Member - Posts: 25

Joined: September 15, 2004

Location: United States

Posted: April 08, 2005 at 9:14 AM / IP Logged

I changed the rca cables, has a good chassis ground and what do you mean by input gain. the amp gain or something on the deck. He has a deh-p3600.

Ace Customs

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mrmsudawgs

Copper - Posts: 145

Joined: February 22, 2005

Location: United States

Posted: April 08, 2005 at 4:35 PM / IP Logged

I get a random bump noise from my Polk C400.4. It happens maybe three times a day. I've checked the wires two or three times - even tried to create the noise by jiggling the wires but nothing happened. I checked my ground with a meter and it checked out fine. I'm stumped. My system is perfect except for that once-every-now-and-then bump.

Mike

2000 F150 Supercab Lariat, Alpine CDA-9831, Polk MMC570 in Doors, One Polk MM2104 Sub, One Polk Carbon C400.4 Amp.

John 3:16

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DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: April 08, 2005 at 4:41 PM / IP Logged

Amplifier gain = input gain.

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mbemount

Member - Posts: 5

Joined: April 10, 2005

Location: United States

Posted: April 10, 2005 at 1:08 AM / IP Logged

ALSO, is the amp drilled in place into the frame of the car? Some amps if they are straight screwed into the frame or metal get bad noise in them and go crazy. Unscrew it from the frame if it is and see how it sounds. One of our installers had that happening until I told him how to fix it.

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ace customs

Member - Posts: 25

Joined: September 15, 2004

Location: United States

Posted: April 10, 2005 at 11:01 PM / IP Logged

thanks for the help guys it was the ground. There was too much paint in between the bolt and the metal. thanks guys

Ace Customs

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Amp noise

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