[BiturboS4] audio upgrades

Robert Cheng rcheng at mindspring.com
Tue Sep 24 14:40:55 EDT 2002

At 09:57 AM 09/24/2002 -0700, California Fields wrote:
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>Has anyone upgraded their audio components in the S4?  I have the Bose system
>and I think I blew one of the rear deck speakers.  I went to Crutchfield and
>they don't have an S4 listing...but they do have an A4 listing.  Anyone know
>the specs for our Bose system?  I'm led to believe we have 2 rear deck 6.75"
>woofers, 2 rear door 4" midranges, 2 front door 4" midranges, and 2 front door
>tweeters.  Is that right? Does the Bose system have the crossovers built in
>the system?

The speaker complement in the S4 is: Tweeters and 4" in the front door, ~6"
in the rear doors, and two 6.5" subs in the rear deck.  The system has
active crossovers built-in to the Bose amplifier, which happens to be a
5-channel amp (4 corners and mono sub).  The Bose amplifier also contains
equalization for the particular Bose drivers and car.  It's this EQ that
makes simply dropping in new speakers or a new amplifier sound bad.  To
upgrade you should upgrade both the speakers and amp.

MB Quart makes an adapter for the A4/S4 that allows you to mount a 5 1/4"
driver in the front door.  They also make an adapter for the rear to adapt
the square hole to a round 6.5"

'00 S4

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