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					Originally Posted by ChrisZang
					
				 just a quick poll to figure out what kind of "upgrade" I should refrain myself from doing.
 I guess my "biggest amount of money thrown away" so far was when I tried to get better sound from the rear speakers:
 
 - picked up Bose rear enclosure
 - redid "fancy Bose wiring" so I could connect it to normal Porsche amp
 - bought new woofers and tweeters for the Bose rear shelf
 - upgraded to a 6-channel amp
 
 Results: sounds exactly as crappy as before with the standard rear speaker shelf
 
 Anyone else who regrets "the ghosts of upgrades past"?
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Sounds like you are missing an EQ. If you don't use one of those with all the stuff you did to you stereo it will still sound crapy. I have the same set-up with an EQ and it sounds amazing!