Alpine deck popping noise
#1
Alpine deck popping noise
Just installed a CDA-9885 in a '97 VW Jetta.
The problem is, any time I press a button to change a track or radio station (or anything else), the speakers make a "POP" noise. It also does this when you turn it on or off. Its pretty loud...and annoying.
I think it may have something to do with the factory amps (the car has a Bose system in it).
I turned of the internal amp of the head unit, and connected the RCA's from the deck, to a Factory Amp Integration harness. So I'm sending line level outputs to the Bose amp/system.
Any clues as to what the problem may be?
Would a bad ground cause this? I've connected the ground wire from the factory plug to the ground on the head unit harness. Do I also have to ground the casing of the head unit somehow? or does the ground wire take care of that.
Sorry for rambling on...just don't know what to try...
The problem is, any time I press a button to change a track or radio station (or anything else), the speakers make a "POP" noise. It also does this when you turn it on or off. Its pretty loud...and annoying.
I think it may have something to do with the factory amps (the car has a Bose system in it).
I turned of the internal amp of the head unit, and connected the RCA's from the deck, to a Factory Amp Integration harness. So I'm sending line level outputs to the Bose amp/system.
Any clues as to what the problem may be?
Would a bad ground cause this? I've connected the ground wire from the factory plug to the ground on the head unit harness. Do I also have to ground the casing of the head unit somehow? or does the ground wire take care of that.
Sorry for rambling on...just don't know what to try...
Last edited by Parps; 05-08-2007 at 08:51 AM.
#2
hey welcome to the fun worl of intergrating factory amps! now you can try grounding the shielding of the RCAs to the chasis of the deck, but most times it leads to more noise you can try grounding the deck to another source, try running a ground loop isolator. The best solution is going to be to remove the amps all together and run new speaker wires to the speakers, but chances are they are going to be a stupid impedence and you will have to replace the speakers. Unfortunetly replacing the headunit is more then just buying the Activ speaker low level harness, it rarely works 100%
#4
Originally Posted by Hooter
hey welcome to the fun worl of intergrating factory amps! now you can try grounding the shielding of the RCAs to the chasis of the deck, but most times it leads to more noise you can try grounding the deck to another source, try running a ground loop isolator. The best solution is going to be to remove the amps all together and run new speaker wires to the speakers, but chances are they are going to be a stupid impedence and you will have to replace the speakers. Unfortunetly replacing the headunit is more then just buying the Activ speaker low level harness, it rarely works 100%
Would a grounding problem be present at all times?
I think the speakers are 2ohms...
#5
Originally Posted by Tom.F.1
Why would you ruin the sound of a good alpine like that with a factory amp?
Originally Posted by Tom.F.1
Worse, have you still got factory speakers?
The system is doing exactly what I want it to do, expect for the popping thing....
Any advice?
Last edited by Parps; 05-08-2007 at 09:13 AM.
#6
how have you got it hooked up? did you use the alpine speaker outputs to go to the line level input on the factory amp?
The way to do it right, is get the proper interface. You should use the RCA's out of the alpine, and a line output converter to go to the factory amp.
PAC & Soundgate sell interfaces to do this.
The way to do it right, is get the proper interface. You should use the RCA's out of the alpine, and a line output converter to go to the factory amp.
PAC & Soundgate sell interfaces to do this.
#7
Originally Posted by Tom.F.1
how have you got it hooked up? did you use the alpine speaker outputs to go to the line level input on the factory amp?
The way to do it right, is get the proper interface. You should use the RCA's out of the alpine, and a line output converter to go to the factory amp.
PAC & Soundgate sell interfaces to do this.
The way to do it right, is get the proper interface. You should use the RCA's out of the alpine, and a line output converter to go to the factory amp.
PAC & Soundgate sell interfaces to do this.
This is the harness I used: http://www.bestkits.com/i/bha1784r.jpg
I believe that this is the proper interface.
I figured this was a better option than converting the speaker outputs to line level, then sending it to the factory amps which re-convert to speaker level. The quality would be worse because there is an unneccessary conversion.
With the method I used, the conversion from line level to "speaker level" is only done once...
I'm close to giving up and replacing the speakers and running new wires to them straight from the head unit....I really don't want to do that tho...
Anything else I can try?
Last edited by Parps; 05-09-2007 at 12:58 PM.
#9
Originally Posted by J_H22civic
man I had the same thing dude......its a loud popping and very annoying....I told my cousin and he checked the wiring......it turn out to be a shortage with the wiring.....check all the wiring properly......DUDE
Did the popping noise only happen when you pressed a button?
#10
the popping is caused because the factory amplifier is very sensitive to line noise, you probably arent able to trun the volume on the hu up that far as well.... right ? like only half way ? or less before the facotry amp begins to clip. two ways around this..... first is fry using a line out converter on the speaker out on the hu . use one that you can adjust the sensitivity on.
other option is to replace the factory amp with aftermarket 4 ch and passive crossovers. quite abit of work but the end result is pretty good
other option is to replace the factory amp with aftermarket 4 ch and passive crossovers. quite abit of work but the end result is pretty good