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Bose system front amps signal+pinout?

Old Aug 26, 2009 | 02:49 PM
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Bose system front amps signal+pinout?

Hi

What are the pinouts for those little front door amps?
Is there a clear signal running to it or is it amplified already from main amp? I guess it's clear signal (+EQued by main amp slightly).
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Old Aug 26, 2009 | 07:34 PM
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Originally Posted by falko76
Hi

What are the pinouts for those little front door amps?
Is there a clear signal running to it or is it amplified already from main amp? I guess it's clear signal (+EQued by main amp slightly).
Here is a picture of the service manual.

Attached Thumbnails Bose system front amps signal+pinout?-picture-1.png  
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Old Aug 27, 2009 | 03:11 AM
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Thanks a lot! That's what I've been looking for.
Where did you get that schematics from? I'd be happy with a link to full version (torrent or not, doesnt matter lol)

HOWEVER :-) It still doesnt give me enough info. From what I see front tweeters are amplified by rear amplifier, but is it possible that front subs are amped by rear amplifier followed by another amplification by front amps? So amplified signal goes amplified again? Strange!?
Unless that front tweeters signal is just line out (but then the tweeters wouldnt be so loud?)
Also, what the 1D output does (the one that goes into "J" input of each front amp?)

So from my understanding:
A - speaker + (clean signal or already amplified?)
B - speaker -
J - ???
K - Battery (+)
L - Ground (-)

Cheers!
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Old Aug 27, 2009 | 10:25 PM
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Strange but true. The rear amp does power the front tweeters. It also provides the signal input for the front woofer amplifier. I have not checked it yet, but I thing the J is for a remote turn on lead.
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