Radio- Why not quality aftermarket?

[Brett Dikeman]

At 2:05 PM -0800 12/17/02, Linus Toy wrote:

>Just beware that the stock Bose speakers are common-grounded.

This bears further explanation.

None of the modules are grounded on the speaker-side to the chassis.
None.  An entirely separate set of screws and mounts are used in the
rear units, for example.  The fronts are in a completely plastic
enclosure(there are metal inserts for structural purposes in many of
the mounting holes, but they're not connected to anything.)

Each amp has power, ground, signal +, signal -.  All signal wires go
straight back to the head unit, and the signal -'s are NOT tied
together.  If you pull ot the radio, you'll find eight wires, not 5.

Further, they're not tied to ground.  I do not recall if the grounds
all run to a common point, or if they utilize 'convenient' chassis
grounds near their physical locations.  Power is of course central
from the relay in the aux relay panel(relay is tripped from the
radio.)

I believe SOME Bose systems utilize a common signal negative, which
is what I think you're referring to.

Also- bose speakers are a specific impedance.  I've heard from one
guy who smoked(literally) one of the drivers with an aftermarket head
unit.

Brett
PS:those of you with avants should think twice about ripping
everything out.  OEM was none other than MB Quartz.  I don't recall
if MB Quartz was the speaker OEM for the 10-speaker type 44 system- I
do remember seeing ITT crossovers though.  That was a pretty nice
sounding system...just not a loud one...
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