pop when turning volume up
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=19268
Printed Date: June 10, 2024 at 3:04 AM
Topic: pop when turning volume up
Posted By: aggie altima
Subject: pop when turning volume up
Date Posted: September 24, 2003 at 4:13 PM
Since I'm starting school, I put my amp back in to power my inside speakers so I could listen to music when I'm driving. I know this subject has been brought up many times, but I couldn't find anything like mine. What happens is that when my radio turns on, the speakers pop. I thought it was only when it turns on, but I turned the volume down to 0, and when I turn it up to 1, it still pops, so it isn't the amps turning on before the radio. I'm also getting the infamous alternator whine. I don't know enough about a car's electrical system to pinpoint anything. Any suggestions on what's wrong? Thanks in advance.
Replies:
Posted By: Fireman__1
Date Posted: September 24, 2003 at 4:34 PM
for the alternator whine try a noise filter. i found a good one at radioshack (part # 270-051b) fairly cheap. i don't know if theres one close to u or not but alot of electronics places carry them. as for popping when u change the volume it sounds as though your volume pot is dirty. if it's a rotary volume knob try blowing air around it and into it (5-10 psi max). try that and see what happens...
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Joshua Hickey
Posted By: nedgeworth
Date Posted: September 24, 2003 at 4:36 PM
What model amp are you running? And how have you wired it up ie. have you run the power cable down one side of the car and RCA's down the other?
Posted By: aggie altima
Date Posted: September 24, 2003 at 5:50 PM
ummm... sorry but can you explain what a noise filter does? I just want to know the details of things, thanks Fireman_1. And nedgeworth, the amp is a kenwood kac-749s. Yes they are ran down opposite sides. But here's the thing. My new amp rack is just about the same as my old one, with the distribution blocks for power and ground in between my two amps. This didn't happen with my old amp rack. The power wire block is near the rca's of the kenwood amp, which I think is the amp causing any interference. Should I move the power block and keep the power wires away from the rca's?
Posted By: nedgeworth
Date Posted: September 24, 2003 at 6:03 PM
That would be something to try! If that doesn't work be sure to check you have a solid grounding. If you don't have a choice but to have the power wires near the rca's be sure to cross them over a a 90 degree angel to minimise interferance.
Posted By: Fireman__1
Date Posted: September 24, 2003 at 8:20 PM
a noise filter is like a power regulator. it regulats the power going into a system. when ur vehicle is running ur alternator turns at different speeds and creats a power "whine". most all electronics designed to be used at 12volts has a regulator built in which normally filters the noise but sometimes this doesn't filter out all of it. the filter i suggested is good up to 10 amps which usually covers ur deck where most of the noise is created. basicly what happened is u went from an older system to a newer one in the same vehicle of which is somewhat older. in older vehicles the alternator "whines" even worse and it just gets worse as time passes. the older system probably had a better built in filter.
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Joshua Hickey
Posted By: fuseblower
Date Posted: September 25, 2003 at 8:17 AM
Your problem can be due to multiple issues. As for the pop it could be the volume control on the radio or the amp. Now the engine whine could be multiple issues. Check the ground wire on the radio and the amp, if it is not properly grounded to the car it could create an open loop and cause the engine whine in your system. Next check your RCA wires one could be bad and causing the whine. Just to save time while checking the ground on the radio connect a new/good RCA to the radio and run it to the amp and see if the whine is still there. If this gets rid of the whine you have the problem beat. You can buy some in-line filters made by PAC to get rid of or make in audible if this does not work. The final analysis is you could have a bad radio or internal solder on the RCA's inside the amp was cold soldered and needs to be re-soldered.
Posted By: rgardjr
Date Posted: September 25, 2003 at 11:25 AM
I had a similar problem a while ago in one of my vehicles. My problem was that I speaker was grounding out to the metal door. I'd get a large pop when I'd shut the door or hit a big bump. Once I figured this out I just had to make sure that none of the connections on the speaker could touch the metal in the door.
Posted By: aggie altima
Date Posted: September 27, 2003 at 5:48 PM
Okay everyone, I am 99% sure that I found the problem. After trying the ground and finding nothing, I started playing with the RCA's. What I found by accident is that the pop is fixed when I touch any metal part of the RCA connection to metal. What does this mean? Do I have to ground the RCA's, and if so, how? Thank you for all your help during these frustrating times, hahah.
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