Getting rid of Alternator Whine

TXSpeedDemon · 05-01-2010, 09:40 PM

All fixed today, thanks again for the help.

I regrounded the amp powering the speakers with a single 8-gauge line to the same point most of the other guys here have and the whine went away completely.

I then regrounded the amp powering my subs with dual 8-guage lines to the same point, and changed the speaker wiring from 16 to 12 guage and OH MY GOD they hit 10Xs as loud and are CLEAN! At 50% gain my girlfriend heard it on the third floor of her condo and I was rattling her garage door in it's frame! I'm very happy now.

BTW, in case you're wondering I have 2 Boston Acoustics G5 10-44 Subs, wired at 2 Oms powered by a Boston Acoustics GT 2300 Amp with a 500 wt load to each sub. It's major overkill for this car but I love it

Speakers are Infinity Kappa Perfect 6.1 components powered by a Boston Acoustics GT125 amp putting out 125 wt RMS to each crossover. I would recommend a different speaker set up only cause the tweeters are dome and so I had to make a custom bracket to get them to fit in the stock location. But if you don't mind doing that they are great too. Crystal clear all the way up to volumes which make your ears bleed.

Liquid_G · 05-03-2010, 10:43 AM

Quote:

Originally Posted by TXSpeedDemon

All fixed today, thanks again for the help.

I regrounded the amp powering the speakers with a single 8-gauge line to the same point most of the other guys here have and the whine went away completely.

TXSpeedDemon, what grounding point did you use, I tried searching for what most guys have done but have not found it.. I have a tiny bit of whine that I need to get rid of also.

GalletGun · 01-05-2014, 01:17 PM

bump? what is this mysterious great grounding location?

I just installed a new system and have a constant hissssss and alternator whine when rpm changes. Both of which go away when I turn the headunit off (amplifier turns off too). Pic is where I grounded my amp. Is this a newb ground attempt? I didnt sand or anything.

GalletGun · 01-05-2014, 03:10 PM

I figured it out. After relocating ground to a different location andnsanding down the metal it had no effect on the hiss and whine. I noticed the gain on my amp was at 3/4 max. I turned the gain down all the way to zero and everythimg is now whisper quiet. No more hiss or whine.

Ofcourse I have to turn up the volume higher now to get "loud" but on the Pioneer 4600 the volume seems like it goes on forever. With the gain all the down at a certain volume I would notice distortion but it was way beyond anybodies listening threshold. I wonder why anyone would even need to turn up the gain? Should I turn it up a little bit? Sound quality doesnt seem effected.

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05-01-2010, 09:40 PM	#1 (permalink)
TXSpeedDemon Enthusiast Member Join Date: Jul 2009 Location: Texas Posts: 330 Drives: 370Z, MSP, R8, 335 Rep Power: 3371	All fixed today, thanks again for the help. I regrounded the amp powering the speakers with a single 8-gauge line to the same point most of the other guys here have and the whine went away completely. I then regrounded the amp powering my subs with dual 8-guage lines to the same point, and changed the speaker wiring from 16 to 12 guage and OH MY GOD they hit 10Xs as loud and are CLEAN! At 50% gain my girlfriend heard it on the third floor of her condo and I was rattling her garage door in it's frame! I'm very happy now. BTW, in case you're wondering I have 2 Boston Acoustics G5 10-44 Subs, wired at 2 Oms powered by a Boston Acoustics GT 2300 Amp with a 500 wt load to each sub. It's major overkill for this car but I love it Speakers are Infinity Kappa Perfect 6.1 components powered by a Boston Acoustics GT125 amp putting out 125 wt RMS to each crossover. I would recommend a different speaker set up only cause the tweeters are dome and so I had to make a custom bracket to get them to fit in the stock location. But if you don't mind doing that they are great too. Crystal clear all the way up to volumes which make your ears bleed.

01-05-2014, 03:10 PM	#4 (permalink)
GalletGun Base Member Join Date: Oct 2013 Location: Baton Rouge, LA Posts: 224 Drives: 2013 Nissan 370Z Rep Power: 12	I figured it out. After relocating ground to a different location andnsanding down the metal it had no effect on the hiss and whine. I noticed the gain on my amp was at 3/4 max. I turned the gain down all the way to zero and everythimg is now whisper quiet. No more hiss or whine. Ofcourse I have to turn up the volume higher now to get "loud" but on the Pioneer 4600 the volume seems like it goes on forever. With the gain all the down at a certain volume I would notice distortion but it was way beyond anybodies listening threshold. I wonder why anyone would even need to turn up the gain? Should I turn it up a little bit? Sound quality doesnt seem effected.