Engine Noise with 4channel amp????
#1
01-13-2008 | 02:18 PM
Thread Starter
|
HCF Member
Joined: Oct 2006
Posts: 26
Engine Noise with 4channel amp????
Hey, I recently bought a 4 channel JL Audio A4300 amp. I installed it underneath the drivers seat. I wired it according to the JL diagram. The only thingI changed is, I tapped into the speaker wires via the metra wiring harness on the back of the Pioneer Head unitso i wouldnt have to cut any factory wires. My ground is on the seat floor bolt. I have also tested to see if it was the amp by using another amp and the High piched, squeeky, loud, annoying noise is still there please help me with my problem.Any info wouldbe great.
Thanks, Bradford
OH! and mycar is a 97 civic HB.
Thanks, Bradford
OH! and mycar is a 97 civic HB.
#5
01-14-2008 | 05:40 AM
HCF Member
Joined: Dec 2007
Posts: 320
From: EH, CT
RE: Engine Noise with 4channel amp????
ORIGINAL: civicduty96
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
It's because the couplings in the back of their head units (which all head units have) which have the purpose of resisting the whining noise, tend to blow when the RCA's touch anything with even a small electric charge, as small as a car static shock.
So indeed try this
Ground the shield of your RCA anywhere to your car and see if it stops.
If not, you probably have a bad ground connection, and it might not be your amp.
Now you say you tapped into the speaker wires in the back of your head unit?
In all honesty, you really should be using RCAs in the first place. Use RCAs as well and see if it solves the problem.
#6
01-14-2008 | 07:15 AM
HCF Member
Joined: Apr 2007
Posts: 424
From: luverne MN
RE: Engine Noise with 4channel amp????
ORIGINAL: imshirazy
It's not actually because they cause ground loops
It's because the couplings in the back of their head units (which all head units have) which have the purpose of resisting the whining noise, tend to blow when the RCA's touch anything with even a small electric charge, as small as a car static shock.
So indeed try this
Ground the shield of your RCA anywhere to your car and see if it stops.
If not, you probably have a bad ground connection, and it might not be your amp.
Now you say you tapped into the speaker wires in the back of your head unit?
In all honesty, you really should be using RCAs in the first place. Use RCAs as well and see if it solves the problem.
ORIGINAL: civicduty96
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
It's because the couplings in the back of their head units (which all head units have) which have the purpose of resisting the whining noise, tend to blow when the RCA's touch anything with even a small electric charge, as small as a car static shock.
So indeed try this
Ground the shield of your RCA anywhere to your car and see if it stops.
If not, you probably have a bad ground connection, and it might not be your amp.
Now you say you tapped into the speaker wires in the back of your head unit?
In all honesty, you really should be using RCAs in the first place. Use RCAs as well and see if it solves the problem.
and i do believe he's using rcas .... he's tapping into the harness so he doesnt have to run wires into the door
#7
01-14-2008 | 03:08 PM
Joined: Dec 2007
Posts: 32
RE: Engine Noise with 4channel amp????
Thanks for that link. Two of my problems with my setup are listed there, and hopefully after going through those steps I can work out exactly how to fix it and exactly what's causing it. The thumping of my subs isn't too annoying, but the alternator whine is unbarable out of my rear speakers.
#8
01-14-2008 | 04:14 PM
Thread Starter
|
HCF Member
Joined: Oct 2006
Posts: 26
RE: Engine Noise with 4channel amp????
"and i do believe he's using rcas .... he's tapping into the harness so he doesnt have to run wires into the door." Thats correct.
Well I left out one thing. I ran my RCAs down the center console to the amp.
Today i went to the local audio store. I told the guy my problem and when i told him what car i had, he imediatly said that thereis some computer thing in the center of the cartoward the front oftheconsole. He seemed very positive that was interfering with my RCAs. Next weekend I will move my RCAs to the opposite side as the power wire and see if that makes a difference. If not I will try grounding the RCA sheild.
Thanks alot, keep the info coming,
Bradford
Well I left out one thing. I ran my RCAs down the center console to the amp.
Today i went to the local audio store. I told the guy my problem and when i told him what car i had, he imediatly said that thereis some computer thing in the center of the cartoward the front oftheconsole. He seemed very positive that was interfering with my RCAs. Next weekend I will move my RCAs to the opposite side as the power wire and see if that makes a difference. If not I will try grounding the RCA sheild.
Thanks alot, keep the info coming,
Bradford
#10
01-14-2008 | 09:06 PM
HCF Member
Joined: Dec 2007
Posts: 320
From: EH, CT
RE: Engine Noise with 4channel amp????
ORIGINAL: civicduty96
when that happens it opens up the ground which is supposed to be there.... creating resistance between the headunit and the amp...AKA ground loop...
and i do believe he's using rcas .... he's tapping into the harness so he doesnt have to run wires into the door
ORIGINAL: imshirazy
It's not actually because they cause ground loops
It's because the couplings in the back of their head units (which all head units have) which have the purpose of resisting the whining noise, tend to blow when the RCA's touch anything with even a small electric charge, as small as a car static shock.
So indeed try this
Ground the shield of your RCA anywhere to your car and see if it stops.
If not, you probably have a bad ground connection, and it might not be your amp.
Now you say you tapped into the speaker wires in the back of your head unit?
In all honesty, you really should be using RCAs in the first place. Use RCAs as well and see if it solves the problem.
ORIGINAL: civicduty96
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
try grounding the shield of your rca lines..... pioneer head units are well known for creating ground loops
It's because the couplings in the back of their head units (which all head units have) which have the purpose of resisting the whining noise, tend to blow when the RCA's touch anything with even a small electric charge, as small as a car static shock.
So indeed try this
Ground the shield of your RCA anywhere to your car and see if it stops.
If not, you probably have a bad ground connection, and it might not be your amp.
Now you say you tapped into the speaker wires in the back of your head unit?
In all honesty, you really should be using RCAs in the first place. Use RCAs as well and see if it solves the problem.
and i do believe he's using rcas .... he's tapping into the harness so he doesnt have to run wires into the door