Radio- Why not quality aftermarket?
brett at cloud9.net
Tue Dec 17 17:46:52 EST 2002
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
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
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...
"They that give up essential liberty to obtain temporary
safety deserve neither liberty nor safety." - Ben Franklin
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