In reference to the sound quality preamp vs. amp issue, the reason you
want to use preamp outputs whenever possible is because with the space and
financial constraints of building a head unit, it is impossible/unlikely
to have a quality amplifier built into a head unit. In fact, almost all
top-end units have NO amplifier at all. The lower-quality amplifier in
the head unit adds much more distortion (typically) than a well-built
(separate) amplifier would, so your overal sound, given the same low-level
input, is more distorted. Bottom line is, the best sound quality is going
to come from a clean head unit through a low-level output to a quality
amp.
David Gloff
Computer Technician
Valcom Professional Computer Center; Kemper/Scudder/Zurich Funds
aolim: dgloff
Loaded Intense Blue '99 Dakota Sport CC 318 5-speed 3.92SG
Sony C680 CD Player and HX-504 amp
Phoenix Gold XS 10" Sub, 6 1/2" midranges, 3/4" tweeters
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