Noise from subs

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smokinsmitty

Copper - Posts: 75

Joined: December 26, 2005

Location: United States

Posted: April 26, 2006 at 6:17 PM / IP Logged

Ok well when my HU is on pause you can hear my subs still playing and feel them moving! why is this? when my HU is off it doesnt do it though? Does everyones do this! my buddys does in his car to!

1 15" Memphis Mojo,

Memphis 16-mc1000D amp,

Audiopipe 4gauge mp kit, Pioneer DEH4700MP head unit.

2002 Yamaha 660R Raptor

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jeffchilcott

Platinum - Posts: 2,483

Joined: April 11, 2002

Location: United States

Posted: April 26, 2006 at 6:28 PM / IP Logged

are they actually playing music, or just random noises? try playing a song but turn the deck all the way to 0 and see if they do it as well

if they do, you might possibly have very very unballanced RCA's...I have seen this on quite a few panisonic deck but not pioneer.

you could try grounding the outer shield of the rca's and see if that helps.

or it could be signal noise generated by rca's running to close to a positive or power wire

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smokinsmitty

Copper - Posts: 75

Joined: December 26, 2005

Location: United States

Posted: April 26, 2006 at 6:55 PM / IP Logged

ok well it does it when it is also turned down to 0! how do u ground the outer shields! i already moved my RCA's to the other side of the car! this didnt fix it

1 15" Memphis Mojo,

Memphis 16-mc1000D amp,

Audiopipe 4gauge mp kit, Pioneer DEH4700MP head unit.

2002 Yamaha 660R Raptor

Yamaha FZR600 crotch rocket

Sea Doo XP800

Sea Doo Spi

ZipPhReaK

Copper - Posts: 57

Joined: March 18, 2002

Posted: April 26, 2006 at 7:18 PM / IP Logged

Try grounding the metal case of the radio to a good chassis/body ground around the radio opening.

ZipPhReaK

smokinsmitty

Copper - Posts: 75

Joined: December 26, 2005

Location: United States

Posted: April 26, 2006 at 7:31 PM / IP Logged

well the noise still comes through the subs even when the car isnt running! if the key is just turned backwards it will still make ithe noise.

1 15" Memphis Mojo,

Memphis 16-mc1000D amp,

Audiopipe 4gauge mp kit, Pioneer DEH4700MP head unit.

2002 Yamaha 660R Raptor

Yamaha FZR600 crotch rocket

Sea Doo XP800

Sea Doo Spi

ZipPhReaK

Copper - Posts: 57

Joined: March 18, 2002

Posted: April 26, 2006 at 7:44 PM / IP Logged

Reground the metal case of the deck, check the amp ground, clean it up, make sure its clean no paint or rust. Try some new RCA cables, shielded.

Now if you take your keys out and the deck/amp isn't on, are you saying it's still making the noise, or when the key is in the accessory position?

ZipPhReaK

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: April 26, 2006 at 8:49 PM / IP Logged

Could be a ground loop, could be insanely high gain setting, could be a short in the input signals.

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smokinsmitty

Copper - Posts: 75

Joined: December 26, 2005

Location: United States

Posted: April 27, 2006 at 5:47 AM / IP Logged

it will make the noise when the keys are in the ignition, only if the car is started or the key is turned backwards! not if the keys are out are out or just sitting there in the off position! if the HU is off it doesnt make any noise. my level isnt set to high. its half. but when i turn down my level on the side of the amp it goes away but then the subs hardly hit cause the level is down. the RCA's I have, have a inuslated covering around them! so my HU needs regrounded u think?

1 15" Memphis Mojo,

Memphis 16-mc1000D amp,

Audiopipe 4gauge mp kit, Pioneer DEH4700MP head unit.

2002 Yamaha 660R Raptor

Yamaha FZR600 crotch rocket

Sea Doo XP800

Sea Doo Spi

xtremej

Gold - Posts: 1,440

Joined: February 24, 2006

Location: United States

Posted: April 27, 2006 at 9:54 AM / IP Logged

I have a panasonic head unit doing this. Its in my display. I haven't had much time to monkey with it but gains are set right on amp. I have not heard of grounding rcas. Jeff could elaborate on how to ground the out shield on the rcas.

shawn9766

Member - Posts: 10

Joined: April 28, 2006

Location: United States

Posted: April 29, 2006 at 11:38 PM / IP Logged

I have the same problem. I hear the noise when the car is off and the ignition is turned back with the radio off. I turned down the gain to make it go away, but now I have harly any bass. That sucks. What can be done to make this go away. I just want my bass with no more noise..... What did you do?

Feed back from radio when key turned off.... I just added a sub and amp but when the radio is off I still get a voom noise from the speaker sub. What would cause this?

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