Do you have the "base" (not sub) turned really high along with the volume?
Sounds like they are clipping.
My brand new S3 8v has crackling sounds in the B&O mid-range speaker of the right door. Next wednesday I will have it replaced under warranty.
Just a quick update on this, mine has got so bad that's it's going into Audi for a minimum of a week while they try a figure out what's wrong. All parts have to be ordered from Germany but they may need it longer.
The worst song so far which if any if you want to give it a try is
Carl Orff - carmina burana: o fortuna on volume 25 minimum.
It is absolutely terrible on my system, would be interesting to hear if it sounds bad on anyone else's.
Will keep everyone posted, it's going in at the beginning of April.
Do you have B&O?
I'll download that song and try it.
I'll also see if I can video it....... I think it's getting worse.
Did you guys allow burn in time for the speakers? The salesmen I had (he used to work in sound) said do not blast the speakers when you first get it otherwise they may crackle. He said allow a weeks worth of driving before fully blasting the system.
Mine is hopefully going in to the dealer next week to have this looked at too. I can't say its got any worse in the 12 months I've had it, but it certainly hasn't got better.
From what I can tell it seems to be all speakers, and I'm nearly convinced its a noisy amp. Definitely more evident on classical music, particularly quiet, high frequency sections when on 25+ on the volume.
Makes me wonder whether they considered the classical music listeners when they designed it.
Dropped my car into the dealers on Monday to have this issue looked at. They have diagnosed a faulty amp / control unit (they did say the part number but i have forgotten), and it is being replaced under warranty. However they are awaiting a technical report or input from Audi Germany.
I shall have to see if it does indeed fix the crackling issue!