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12-09-2006, 10:27 AM
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#1
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Join Date: Jun 2006
Posts: 182
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Engine noise thru my changer?
I'm trying to figure out why I'm getting engine noise only when my changer is playing. Is it possible it's because I'm using a metal bracket to mount it to the chassis? Thanks
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12-09-2006, 11:40 AM
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#2
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,684
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baaaaad ground... how new is this changer you speak of?
__________________
Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-09-2006, 12:05 PM
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#3
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Join Date: Jun 2006
Posts: 182
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It's a 4 year old Kenwood changer (KDC-CMP59FM). I have an even older changer which I just hooked up and the noise was gone. Plugged my current one back in, noise was back.
Is it possible the galvanized bracket I'm using to mount to the car's chassis is acting as a ground that is causing the interference?
EDIT: YES! It's because of the metal bracket. Has to be, since I just unbolted from the chassis, the the noise was gone.
Last edited by 97Formula; 12-09-2006 at 12:23 PM.
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12-09-2006, 02:00 PM
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#4
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Stalker
Join Date: Aug 2004
Posts: 12,077
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in a perfect world, any type of stereo equipment shoudl be isolated from the chassis, ie attached to wood then the wood attached to the car. especially with amps. they should not be screwed directly to the metal body.
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12-09-2006, 09:49 PM
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#5
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,684
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copper or gold would be an excellent insulator for this purpose... but like paul said, ghetto rig some sort of attachment that the changer doesnt touch the chassis and see if that helps at all
__________________
Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-09-2006, 11:21 PM
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#6
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Join Date: Dec 2005
Location: Boston/North
Posts: 9,214
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Quote:
Originally Posted by qwikz28
copper or gold would be an excellent insulator for this purpose... but like paul said, ghetto rig some sort of attachment that the changer doesnt touch the chassis and see if that helps at all
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aren't copper and gold excellent conductors not insulators??
i was going to use the periodic table symbols but then i realized that was really  ish
damn medical school
__________________
Quote:
Originally Posted by BonzoHansen
dumbass.
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Last edited by Knipps; 12-09-2006 at 11:21 PM.
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12-13-2006, 08:58 AM
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#7
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,684
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Quote:
Originally Posted by Chevelle 454
Quote:
Originally Posted by qwikz28
copper or gold would be an excellent insulator for this purpose... but like paul said, ghetto rig some sort of attachment that the changer doesnt touch the chassis and see if that helps at all
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aren't copper and gold excellent conductors not insulators??
i was going to use the periodic table symbols but then i realized that was really ish
damn medical school |
i think how it works is that the copper or gold dont actually touch the changer and "absorb," if you will, the noises transferred through the chassis. i always wonder that too but its what i read on the old car audio forum i used to be on and my old radio had the same copper chassis so i just agreed 
__________________
Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-14-2006, 11:05 AM
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#8
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Quote:
Originally Posted by 97Formula
EDIT: YES! It's because of the metal bracket. Has to be, since I just unbolted from the chassis, the the noise was gone.
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Congratulations. You just discoverd the fun that is a ground loop. You had two ground paths - the ground wire & the mount. SmokingSS was on target.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
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12-15-2006, 04:18 PM
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#9
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,684
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Quote:
Originally Posted by BonzoHansen
Congratulations. You just discoverd the fun that is a ground loop. You had two ground paths - the ground wire & the mount. SmokingSS was on target.
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so making the chassis of the changer not touch the car metal-metal would fix that?
__________________
Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-16-2006, 08:54 AM
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#10
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Quote:
Originally Posted by qwikz28
so making the chassis of the changer not touch the car metal-metal would fix that?
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In this case, yes.
Quote:
Originally Posted by 97Formula
EDIT: YES! It's because of the metal bracket. Has to be, since I just unbolted from the chassis, the the noise was gone.
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__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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12-16-2006, 11:12 AM
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#11
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,684
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Quote:
Originally Posted by BonzoHansen
In this case, yes.
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i used ground loop isolators with my old radio and that didnt work... i wish i knew it was that easy or i wouldnt have been so quick to ditch that radio 
__________________
Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-17-2006, 04:43 PM
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#12
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Join Date: Jun 2006
Posts: 182
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Used the stock bracket, noise is gone. Even though my fronts are powered by an external amp, I now have zero engine noise. The metal bracket was temporary till I got a new bracket from Kenwood (the other one broke from me screwing it in too tight).
Last edited by 97Formula; 12-17-2006 at 04:45 PM.
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03-23-2007, 04:34 PM
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#13
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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u might need a new coil
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03-24-2007, 07:40 PM
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#14
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Join Date: Jun 2006
Posts: 182
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Quote:
Originally Posted by redneckpimpin351
u might need a new coil
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I guess it would've helped if I said this issue is resolved. 
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03-24-2007, 08:20 PM
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#15
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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haha. yeh prolly would have helped...what was wrong with it?
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03-25-2007, 06:14 PM
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#16
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Join Date: Jun 2006
Posts: 182
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Quote:
Originally Posted by redneckpimpin351
haha. yeh prolly would have helped...what was wrong with it?
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Actually, I DID say it was resolved in reply 12! Ever since reinstalling the new plastic bracket, the noise is gone and never came back. Although now that I installed my Sirius Stiletto I might never touch a CD again (at least not as often as I used to).
__________________
Click here for my vBGarage!
Moroso CAI, Hypertech air charger, HPP+ w/160* powerstat, 1LE elbow, Relocated IAT sensor, Spintech muffler, Hotchkis chrome strut tower brace
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03-25-2007, 06:35 PM
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#17
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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haha. thats good. my brothers truck had a problem with engine noise and he gotta new coil and it was prefect afterwards
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