Humming sound in stereo, if i on my aircon. Whay?

[kinyo]

whistling sound naman kasabay ng rpm

yan ang grounding problem ... a quick fix is to use isolation transformer

[rac98]

Dumaan ba rca wires mo malapit sa blower ng aircon? Try to route it somewhere. It might be interference.

Oh, you can also try other input device other than your car stereo like an ipod using an rca to 3.5mm jack and connect it to your amp just to isolate the problem or rule out that it is your head unit that has a problem..

[jhnkvn]

Update ko lang, yung humming sound po nawala na, iniba ko po yung routing ng wires, pinadaan ko na lng agad sa carpet. Nawala n yung humming sound kpag nka ac ako, pero npansin ko my whistling sound naman kasabay ng rpm, nawawala kpag off ang stereo. Diy ko lng

Now you have alternator whine. Still a grounding problem.

[12vdc]

Wire shielding problem possible due to el cheapo wires and connectors

[[archie]]

^agree, did have the same problem with an install I did. After that I never got that generic rca. konting dikit sa ground, static, konting dikit sa car wiring, static.