well i had alternator whining from my speakers when i stepped on the gas...i was told to use a ground loop isolator to fix this problem...it did fix it but now my sound quality of the music sounds soo high pitched and the subs are hitting soo hard even after i tuned them all the way down...i noticed there are two brown wires connected to the ground loop isolator but dont know what to do with them...some one says ground them but i dont kno if i ground juss one of them or both or what?? can someone help with my problem??

 

First a ground loop isolater is a bandaid and should not be used if at all possible. It should be your last resort.

Second which ground loop isolator?

 

its a install edge ground loop isolator...well i juss tried messin with the thing juss now and its not that it makes the sound, sound high...its that it makes the sound, sound like im in a hallway or something...which really sucks ***...what else can i do to fix this whining problem?? i got a pioneer deh-p7800...which has 5v pre outs...would stronger RCAs do the trick for my high output deck??

 

Do you have multiple amps? How many grounding locations for them?

 

What amp?
How and where are the RCA cables and the power cable run in the car?
Where is the amp mounted, and to what?
Where is the amp grounded and how, and how long is the ground lead?
What is the amp driving, door speakers, [high-pass] or a sub(s), [low-pass].

I agree with the above get rid of the ground loop isolator and find the problem.

What is the MM&Y of the car it's in? 94

 

I installed a set of those on the RCAs for my work. They brought the volume of the noise down a bit but I wasn't at all satisfied. If it's there, it's there. It pisses me off. Customer was happy though. I couldn't find the problem... finally I hooked up our shop battery in place of the customer's shitty old battery (based on a tip from a sales guy), and the noise went away! I guess in some cases, a shitty battery can cause noise? Customer didn't want to replace his "good" battery though. Idiot.

 

I think I remember one of my MECP books talking about that. Something about how the battery dampens the current "ripples." I've only ever had to use a ground loop isolator once. The customer was having me install a beat to hell Pyramid amp that looked like it was a decade old. It worked like a charm in that case.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">What amp?
How and where are the RCA cables and the power cable run in the car?
Where is the amp mounted, and to what?
Where is the amp grounded and how, and how long is the ground lead?
What is the amp driving, door speakers, [high-pass] or a sub(s), [low-pass].

I agree with the above get rid of the ground loop isolator and find the problem.

What is the MM&Y of the car it's in? 94</TD></TR></TABLE>

i got two amps one infinity 4 channel and one alpine mono amp...the RCAs are on the left side of the side kick panels and the power is on the right side...i kno about not having them close soo i put them apart...the 4 channel is mounted on the left rear seat and the mono amp is on the floor of the trunk since theres no room to mount it on the other side of the rear seat...both amps are grounded in the rear of the chassis, not together but about 2 1/2 feet away from each other...the ground for the 4 channel is enough to reach the chassis while the mono amp ground has a little extra slack incase i wanna ground it somewhere else farther...the 4 channel i set it to power all door speakers at high pass and the mono to low pass...this sucks cause i never experieneced this with anyones elses cars i installed a system too but MINES haha...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by suspendedHatch &raquo;</TD></TR><TR><TD CLASS="quote">I installed a set of those on the RCAs for my work. They brought the volume of the noise down a bit but I wasn't at all satisfied. If it's there, it's there. It pisses me off. Customer was happy though. I couldn't find the problem... finally I hooked up our shop battery in place of the customer's shitty old battery (based on a tip from a sales guy), and the noise went away! I guess in some cases, a shitty battery can cause noise? Customer didn't want to replace his "good" battery though. Idiot.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rochesterricer &raquo;</TD></TR><TR><TD CLASS="quote">I think I remember one of my MECP books talking about that. Something about how the battery dampens the current "ripples." I've only ever had to use a ground loop isolator once. The customer was having me install a beat to hell Pyramid amp that looked like it was a decade old. It worked like a charm in that case.</TD></TR></TABLE>


You are both correct. the battery filter out the ripples that the altenator makes.

 

i'm a n00b, but aren't you supposed to ground your amps at the same place?

and doesn't "whine" come from improper power connections?

What are the power ratings of the amps, what size power and ground wires are you running?