NO NO NOOOOOO     man another sad customer.   Sorry to hear the Aud
experience is Sour.  The pioneer unit should sound VERY much bette
than the OEM audi deck.  the pioneer should relatively have more tha
ample wattage than that old audi amp, mess with those shaping control
of the pioneer  Bass, treble, natural, superbass, EQ settings whateve
that DEH??? offers.......no way should you spend that kind of money.
Most retailers sell kits that  Bridge wires to bypass your amp, but i
ALL speakers are playing, this is NOT an issue, and that pioneer DE
would very closely match, if not BLOW AWAY  that stock audi amp....i
one was even installed on your model vehicle

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sq4u