Horrible Alternator Whine?
Senior Member
Joined: 10-11-2005
Posts: 259
From: NJ
Update: yesterday I had a family member listen for whine. And asked him to let me know if it lessened as I lifted the rear amp tray, as it raised 6in, the whine disappeared completely. So my amps are just getting interference with the battery it seems. So I'll just relocate them to the seat backs I suppose.
Thread Starter
Member
Joined: 05-06-2012
Posts: 42
From: Florida
You say to same location but you added a ground
Your electrical buddy should know rf interference changes with volume....as ohm change dc resistance changes, thus the square wave ripple increases and frequency of noise changes
Theres old trick of using a light bulb to show this
Are you sure you have alternator whine and not another interference?
I still suggest testing each ground for resistance if any vary there is your issue
Fyi an example is if you upgrade battery to amp and same for amp to ground but leave all other power and ground are factory this causes ground loop aka noise
Your electrical buddy should know rf interference changes with volume....as ohm change dc resistance changes, thus the square wave ripple increases and frequency of noise changes
Theres old trick of using a light bulb to show this
Are you sure you have alternator whine and not another interference?
I still suggest testing each ground for resistance if any vary there is your issue
Fyi an example is if you upgrade battery to amp and same for amp to ground but leave all other power and ground are factory this causes ground loop aka noise
Thread Starter
Member
Joined: 05-06-2012
Posts: 42
From: Florida
Is you're amp for highs or a subwoofer? Both have filters for different frequencies.
Senior Member
Joined: 07-16-2011
Posts: 267
From: Georgia
I have all three of my amps in spare tire well, with battery and a xs power cell. Along with a cascade power supply. No noise
All my power wire was upgraded
DAYTONA area should be several shops offer help and have o scope
All my power wire was upgraded
DAYTONA area should be several shops offer help and have o scope
Thread Starter
Member
Joined: 05-06-2012
Posts: 42
From: Florida
Thread Starter
Member
Joined: 05-06-2012
Posts: 42
From: Florida
Yeah, my thoughts exactly. Even if I had a flat I'd have no time to change it during commute and have to call someone regardless, lol. When you upgrading all wiring, did you run 0/1 or 4ga from the engine bay? Did you go under the carpet, or beneath the chassis?