Stereo issue: whirring noise that mirrors rpm's - TriStateTuners.com :: Home of Tristate Auto Enthusiast

420sx · 04-21-2008, 07:54 PM

Heres my setup:

1 12" Kicker L7
1 Rockford 900w single channel
1 rockford 450w 4 channel
2 5.5" rear speakers (kenwood)
2 6x9" front eclipse 3 ways

Up until recently, the speakers were being powered by the head unit, using the stock wiring. I already had both amps and the sub in and working (although nothing was hooked up to the 4 channel yet). Just recently I did all the wiring to amp the speakers too, and they sound great, everything works perfect. Except i have a whirring noise while the engine is running. The whirring matches the speed of the engine. Is this a grounding issue or something? Any ideas?

wonner · 04-21-2008, 08:30 PM

http://www.caraudiohelp.com/newslett...ator_whine.htm

sleepersatty99 · 04-21-2008, 09:04 PM

well i would try the amp grounds first. let me ask you this.... do you have the 12v power wire ran next to/or near the rca jacks? if so move the rca's.

Twinz · 04-21-2008, 10:04 PM

one of the grounds are bad...my friend had the same problem, fixed the ground and it went away.

420sx · 04-21-2008, 10:58 PM

Quote:

Originally Posted by sleepersatty99

well i would try the amp grounds first. let me ask you this.... do you have the 12v power wire ran next to/or near the rca jacks? if so move the rca's.

Funny you should mention this. When I got the car, it was already wired for an amp/sub, and the power wire was run right next to the RCA cable. When I discovered this (and realized I needed to run a second RCA cable anyway), I changed the RCA's to one side of the car and the power on the other. Ill check those grounds tomorrow.

Erik · 04-22-2008, 06:34 AM

several things can cause this. If you have an ipod that uses an an adapter into an Aux-in in your head unit, if that comes close to your speaker cables it makes the whirring sound. same with your power wire and ground wire. If its near your alternator itll do it or if any wiring runs near your radiator fan...although i dont know why youd do that. anything that uses some sort of little motor like the rad fan or window motor or has a whine thats electrical, the alternator, can cause this sound.

assault187 · 04-22-2008, 09:20 AM

Check the ground, route RCA interconnects on the opposite side of vehicle that the power wires are running on, If that fails, invest in some decent sheilded RCA's

driftingrx5.7 · 04-22-2008, 01:30 PM

sounds a lot like the grounds to me! my cousin is big on systems in cars and he had that problem once and he got a thicker ground cable and it went away might want to try that as well

OMGz Turbo · 04-22-2008, 03:26 PM

Yeah definitely sounds like a bad ground, I still have problems though haha

taurusshoman · 05-03-2008, 12:20 AM

bad ground like others are saying. also if power wire is close to rca's that could cause it too

04-21-2008, 07:54 PM	#1
420sx Tri-State Post Whore Join Date: Oct 2006 Location: Warrington, PA Member #2811 My Ride: '98 240sx, 98 Impreza L, 00 SV650 iTrader: (5)	Stereo issue: whirring noise that mirrors rpm's Heres my setup: 1 12" Kicker L7 1 Rockford 900w single channel 1 rockford 450w 4 channel 2 5.5" rear speakers (kenwood) 2 6x9" front eclipse 3 ways Up until recently, the speakers were being powered by the head unit, using the stock wiring. I already had both amps and the sub in and working (although nothing was hooked up to the 4 channel yet). Just recently I did all the wiring to amp the speakers too, and they sound great, everything works perfect. Except i have a whirring noise while the engine is running. The whirring matches the speed of the engine. Is this a grounding issue or something? Any ideas? __________________ loltst

04-21-2008, 08:30 PM	#2
wonner Tri-State Addict Join Date: Jun 2005 Location: EastBay, CA Member #519 My Ride: '05 Toyota Corolla LE, '08 Pontiac G6 GT iTrader: (0)	http://www.caraudiohelp.com/newslett...ator_whine.htm __________________ '88 RX-7 SE/'02 Cougar XR/'01 Celica GT-S - R.I.P.

04-21-2008, 09:04 PM	#3
sleepersatty99 Tri-State Addict Join Date: Mar 2007 Location: Mayfair Member #4142 My Ride: 99 saturn sl2 iTrader: (0)	well i would try the amp grounds first. let me ask you this.... do you have the 12v power wire ran next to/or near the rca jacks? if so move the rca's. __________________ Im like a rubber band i always bounce back To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. your suffering will be legendary even in HELL!!!!! To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-22-2008, 06:34 AM	#6
Erik Tri-State Post Whore Join Date: May 2006 Location: Glenside, PA Member #1962 My Ride: 2001 Audi A6 2.7 Twin Turbo iTrader: (4)	several things can cause this. If you have an ipod that uses an an adapter into an Aux-in in your head unit, if that comes close to your speaker cables it makes the whirring sound. same with your power wire and ground wire. If its near your alternator itll do it or if any wiring runs near your radiator fan...although i dont know why youd do that. anything that uses some sort of little motor like the rad fan or window motor or has a whine thats electrical, the alternator, can cause this sound. __________________ --Eric '96 Mazda Miata \| FM V-Maxx Coilovers \| Jackson Racing Exhaust/Intake GONE To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. 01' Audi A6 2.7 Twin Turbo \| Daily \| NoMods

04-22-2008, 09:20 AM	#7
assault187 Tri-State Post Whore Join Date: Jul 2006 Location: Montgomery county Member #2176 My Ride: 97 Mitsubishi Eclipse GST Spyder AWD iTrader: (3)	Check the ground, route RCA interconnects on the opposite side of vehicle that the power wires are running on, If that fails, invest in some decent sheilded RCA's __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. World record holder for Quickest and Fastest 1/4 mile Spyder, 4 cylinder vert, 1st in 10's, 2.0L 4G63 Holset record, Modified Mag December 2010, Self built, self tuned.

04-21-2008, 10:04 PM	#4
Twinz Tri-State Addict Join Date: Jul 2006 Location: SE PA Member #2189 My Ride: 1990 Skyline GT-R iTrader: (4)	one of the grounds are bad...my friend had the same problem, fixed the ground and it went away.

04-22-2008, 01:30 PM	#8
driftingrx5.7 Tri-State Post Whore Join Date: Dec 2006 Location: Poconos PA Member #3099 My Ride: 88 rx5.7 iTrader: (0)	sounds a lot like the grounds to me! my cousin is big on systems in cars and he had that problem once and he got a thicker ground cable and it went away might want to try that as well __________________ my v8 rx7build To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-22-2008, 03:26 PM	#9
OMGz Turbo Tri-State Post Whore Join Date: Dec 2006 Location: Ltown Member #3108 My Ride: 01' WS6..That whistles...01' Explorer 5.slow iTrader: (0)	Yeah definitely sounds like a bad ground, I still have problems though haha __________________ loading HATERS.....99% ████████████████] NO ONE CARES ABOUT BEING TTT APPROVED

05-03-2008, 12:20 AM	#10
taurusshoman Tri-State Training Wheels Join Date: Sep 2005 Location: Stratford, NJ Member #822 iTrader: (0)	bad ground like others are saying. also if power wire is close to rca's that could cause it too __________________ <a href="http://www.carsponsorships.com/scout/sponsor.php?id=3648">CarSponsorships.com</a>

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