Bose is a fully amplified system, the non Bose setup uses the headunit amplifier for the front and back door speakers, and separate smaller amplifiers attached to each rear speaker for the ones on the rear deck.
Also with Bose you do not get tweeters in the back door, only a small mid range in the bottom of the door as it uses the rear deck speakers for the bass. Despite no tweeter in the back door, the sound is still very good whilst sitting in the back.
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Manny
2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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