So, at the minute, I have the standard BMW Business unit it, and it was rigged with some shitty adapter so I could connect an iPod/iPhone, and on Saturday, it shorted my iPhone battery, so it's gone. I have a nice new Alpine deck on the way courtesy of a very generous grandmother, and my single DIN fascia arrived today (has a handy little pocket in it too). With the current stock stereo though, I get alternator whine, which increases in pitch in sync with the revs. I was told I need a noise suppressor for this, but how the hell do I wire it? I'm gonna see if there's anything dodgy in the back first, but just in case, can I wire this inline with the power for the stereo, or do I NEED to wire to the alternator? (I'd much rather not have to do this).
Cheers for the really helpful replies you fuckers My new headunit should be here tomorrow, so any help would be nice, rather than nothing