I'm sure this is something stupid I've done... whining sound from speakers - 3000GT/Stealth International Message Center

Tribute · 05-02-2008, 03:34 PM

So I put a new amp in my car and whenever the car is on the speakers whine in line with the alternator. Sounds like a grounding issue to me but I've looked and can't figure it out. Any things I should look for?(it seems that SOMETIMES when I mess with the Audio In plugs, it goes away, but it doesn't last... I've opened up the box and the connections look good)

Mike1992 · 05-02-2008, 03:42 PM

Did you run the RCA cable along side the Power wire to the amp? If you did thats my guess.

jbavousett · 05-02-2008, 09:12 PM

You might need to ground the outer jacket of the RCA cables. Sometimes that can knock the whine out.

Tribute · 05-02-2008, 10:37 PM

oh, some info I left out. It makes no difference what the RCA source is. I can plug an ipod directly to the amp and it still makes the whine. Thats how I eliminated the power interference possibility. I also tried ground the rca plugs directy to a car screw. No change at all.

AxeMan · 05-04-2008, 09:45 AM

9 times out of 10 it is a grounding issue.

Change the area where you ground the amp,and check the ground on the head unit (CD player)

dodgemystealth92es · 05-04-2008, 10:02 AM

it could also be jest the rca cables alone. cheap rca's can do this. but as stated most often it is a ground issue. ground the amp better and ground the batt to the body better, as well as the head unit. it should go away. but the way you can tell if its a groundproblem is unplug all rca cables and turn it way up. then plug in the rca. if it is still there without rca its in your ground if its only there with rca's its coming from the rca or the head unit.

Tribute · 05-04-2008, 08:17 PM

ok its only there when the RCA's are plugged in. It seems to be there regardless of which rca cables I use however.

3KGTVT · 05-05-2008, 12:03 PM

Did you wire the amp directly to the speakers or to the wiring harness behind the cd player? If it is wired into the wiring harness you need to unplug the stock amp under the passenger seat. Good luck

Tribute · 05-05-2008, 03:36 PM

I removed the stock amp, cut the harness at the amp, then spliced wires to the resulting exposed wires(which led to the speakers) then attached the wires to the amp screwed onto the back of the passenger side back seat.

973000GTSL · 05-06-2008, 07:06 AM

Stinger SGLI Car Audio RCA Ground Loop Isolator Install Accessory

05-02-2008, 03:34 PM	#1 (permalink)
Tribute Forum Member Join Date: May 2003 Location: Richmond Virginia Drives: 94 FWD S/C ATX Trader Rating: (2)	I'm sure this is something stupid I've done... whining sound from speakers So I put a new amp in my car and whenever the car is on the speakers whine in line with the alternator. Sounds like a grounding issue to me but I've looked and can't figure it out. Any things I should look for?(it seems that SOMETIMES when I mess with the Audio In plugs, it goes away, but it doesn't last... I've opened up the box and the connections look good) __________________ Tribute -94 3000gt SL ATX DOHC Current Modifications: --Polyurethane Motor Mounts --Test-Pipe --K&N Filter --3KGT Motorsports Full-Length Headers --High Stall Tq. Converter --Translab-175 Shift kit --Improved clutches --Quaife LSD --Ripp Modifications Supercharger

05-02-2008, 03:42 PM	#2 (permalink)
Mike1992 DSM GURU Join Date: Apr 2007 Location: Springfield, Mo Drives: 91 Stealth RT/TT Trader Rating: (22)	Re: I'm sure this is something stupid I've done... whining sound from speakers Did you run the RCA cable along side the Power wire to the amp? If you did thats my guess. __________________ 1992 Mitsubishi 3000GT VR-4 RIP 3/06 1990 Eagle Talon TSI AWD - 11.29@126 - SOLD 1991 Dodge Stealth RT/TT - K&N / MSD Wires / 2.5" Downpipes Merged 4" Cat-back / Hotwired Walbro 255hp / Aeromotive AFPR / Scanmaster 3 / Innovate LM-1 / F&R Solid Motor Mounts / Greddy RS BOV / TD04-13T / Seattle STS / CXRacing FMIC

05-02-2008, 09:12 PM	#3 (permalink)
jbavousett 1992 Stealth RT Join Date: Oct 2007 Trader Rating: (1)	Re: I'm sure this is something stupid I've done... whining sound from speakers You might need to ground the outer jacket of the RCA cables. Sometimes that can knock the whine out. __________________

05-02-2008, 10:37 PM	#4 (permalink)
Tribute Forum Member Join Date: May 2003 Location: Richmond Virginia Drives: 94 FWD S/C ATX Trader Rating: (2)	Re: I'm sure this is something stupid I've done... whining sound from speakers oh, some info I left out. It makes no difference what the RCA source is. I can plug an ipod directly to the amp and it still makes the whine. Thats how I eliminated the power interference possibility. I also tried ground the rca plugs directy to a car screw. No change at all. Last edited by Tribute : 05-02-2008 at 10:57 PM.

05-04-2008, 09:45 AM	#5 (permalink)
AxeMan New User - Please be kind Join Date: Jun 2007 Trader Rating: (0)	Re: I'm sure this is something stupid I've done... whining sound from speakers 9 times out of 10 it is a grounding issue. Change the area where you ground the amp,and check the ground on the head unit (CD player)

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05-04-2008, 10:02 AM	#6 (permalink)
dodgemystealth92es Forum Member Join Date: Nov 2007 Location: Grand Rapids, MI Drives: dodge stealth es Trader Rating: (0)	Re: I'm sure this is something stupid I've done... whining sound from speakers it could also be jest the rca cables alone. cheap rca's can do this. but as stated most often it is a ground issue. ground the amp better and ground the batt to the body better, as well as the head unit. it should go away. but the way you can tell if its a groundproblem is unplug all rca cables and turn it way up. then plug in the rca. if it is still there without rca its in your ground if its only there with rca's its coming from the rca or the head unit. __________________

05-04-2008, 08:17 PM	#7 (permalink)
Tribute Forum Member Join Date: May 2003 Location: Richmond Virginia Drives: 94 FWD S/C ATX Trader Rating: (2)	Re: I'm sure this is something stupid I've done... whining sound from speakers ok its only there when the RCA's are plugged in. It seems to be there regardless of which rca cables I use however.

05-05-2008, 12:03 PM	#8 (permalink)
3KGTVT Forum Member Join Date: Feb 2008 Location: VT Drives: 1995 3000GT SL Trader Rating: (0)	Re: I'm sure this is something stupid I've done... whining sound from speakers Did you wire the amp directly to the speakers or to the wiring harness behind the cd player? If it is wired into the wiring harness you need to unplug the stock amp under the passenger seat. Good luck

05-05-2008, 03:36 PM	#9 (permalink)
Tribute Forum Member Join Date: May 2003 Location: Richmond Virginia Drives: 94 FWD S/C ATX Trader Rating: (2)	Re: I'm sure this is something stupid I've done... whining sound from speakers I removed the stock amp, cut the harness at the amp, then spliced wires to the resulting exposed wires(which led to the speakers) then attached the wires to the amp screwed onto the back of the passenger side back seat.

05-06-2008, 07:06 AM	#10 (permalink)
973000GTSL Paid Member Join Date: Jul 2002 Location: Warminster, Pa Drives: 97 3000GT VR4 Black Trader Rating: (3)	Re: I'm sure this is something stupid I've done... whining sound from speakers Stinger SGLI Car Audio RCA Ground Loop Isolator Install Accessory __________________ 1997 3000GT VR4 Black RoJa R2-5 18X9 w/Dunlop Direzza Sport Z1 Star Spec KN FIPK Mods to be installed Apexi AVC-R Walbro 255 hotwired Unorthodox Underdrive Pulley 1997 3000GT SL Black (sold)