Alpine HU Pops on power on and source change

[mordz]

I just got a new HU - MP3 and Ipod support.

sounds really good but i have the pop issue when i turn it on/off and switch source.

I have used the RCA pre out from the HU and the RCA harness adaptor.

Does anynone have any suggestions to get shut of the loud POP?

 

[Emmo]

you could try a different earthing point?

 

[timps]

Your pop is caused by “DC offset” to the Audi amp.

This link describes a few cures

http://www.audi-sport.net/vb/showthread.php?t=43956

 

[mordz]

thanks guys,

ill have a look at that and post my findings

 

[AndyMac]

Or use the speaker input harness adapter.

 

[mordz]

hay guys,

i have swapped out the RCA adaptor for the speaker out adaptor i have, its fixed the pops but i have lost control of the sound distrobution to a degree.

before the subwoofer controll on the amp worked great but now has no effect. i can get round that by just changing the bass control so not too fussed.

had to turn the loudness off since the stereo is now propper loud at level 5 volume. think ill cope with that for a bit till it gets annoying then perhaps swap out the entire system or put some inline DC offset gadgets in between the amps and speakers

 

[NISHS3]

I had exactly the same problem with my alpine single din sat nav unit. I disconnected the bose sub have an aftermarket alpine one to go in there instead and it fixed it. The popping had gone. I had been to a few car audio places with no joy before and was starting to think it was the alpine head unit.

 

[jomnhta]

The suggestion #4 posted by AndyMAC in the above quoted thread works.

You can splice a 16uF or 22uF capacitor in the RCA plug and it will silent all the POPS. This is what I am using on my 9835 now which directly connect to the OE Bose system.

 

[Nuri]

I'll second that! The capacitors are a little fiddly to do, but well worth it considering the results they provide.