Hi, some days ago I installed a few car-audio components to my '04 Accord Coupe:a subwoofer, 6 speakers (i changed the standard speakers from Honda), an equalizer and an amplifier.
All of them from well-known brand names, and the audio is now amazing. The only problem is that when i turn on the car, eject a CD from the 6-cd changer, insert a CD or turn off the car I hear an annoying noise.
The guy who installed all this stuff said that there is a difference of voltage (?) between the subwoofer and the car-stereo (original from Honda). He installed a 'relay' but the noise is still there.
Do anyone has experienced this problem after installing car-audio components like these? What's the solution? Please help me.