Amp buzz/groung noise

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djyoyo

Member - Posts: 4

Joined: March 02, 2005

Location: England

Posted: March 02, 2005 at 3:23 PM / IP Logged

I had 1 amp powering rear speakers, HU powering front speakers all worked fine. Bought 2nd amp for front speakers then all 4 speakers began to buzz all the time , click when indicating and whine when accelerating. I tried both amps individually with both pairs of speakers with no luck . Active sub works fine also tried disconnecting sub and using subs ground point this made no difference. Speakers work fine when just coming off HU. I was told amps were faulty (they were cheap) so i just bought new sony 500Watt amp this is just the same so its not an amp problem. Amp connected via RCA ,sub Connected on speaker wire. halfords say i need a 2nd battery as its apparently a powerfull system! I wondered if i need to upgrade link from chassis/body to the battery to help the grounding? can anyone help i'm stuck?

wheres the remote

kfr01

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Joined: April 30, 2003

Posted: March 02, 2005 at 4:47 PM / IP Logged

Who says you need a second battery? Never take their advice again.

It is a ground issue, I'm 99% sure. Read all the wonderful posts that are sticky at the top of the page on grounding.

New Project: 2003 Pathfinder

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: March 02, 2005 at 4:51 PM / IP Logged

Read the sticky......read the sticky.......

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

djyoyo

Member - Posts: 4

Joined: March 02, 2005

Location: England

Posted: March 02, 2005 at 5:14 PM / IP Logged

Think ive tried most of the advice its strange how 1 amp worked before and now non work properly the buzz stays the same, but if you turn up the volume you cant here the buzz does that help. Ive changed RCA cable so its not that. HU didnt like being grounded away from original point so i kept it there. My battery is new ,system is in renualt 5 1996. At one point the fuse for HU and interior light blew before i got new amp. HU is a new sony cassette with cd changer in boot near amp.

wheres the remote

kfr01

Gold - Posts: 2,121

Joined: April 30, 2003

Posted: March 02, 2005 at 10:42 PM / IP Logged

http://www.epanorama.net/documents/groundloop/basics.html

I'm fairly certain you have a ground loop.

If you can't figure it out PLEASE take it to a professional shop that actually knows what they're doing before letting some guy sell you a new battery, of all things.

New Project: 2003 Pathfinder

djyoyo

Member - Posts: 4

Joined: March 02, 2005

Location: England

Posted: March 05, 2005 at 3:45 PM / IP Logged

thanks for the help found the fault the RCA output in HU was not grounding properly getting HU swapped for a new one in a few days.

wheres the remote

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Amp buzz/groung noise

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