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Old November 5th 04, 12:29 PM posted to uk.rec.audio
Keith G
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Posts: 7,388
Default Sub down - rescue mission initiated


"Wally" wrote in message
...
Keith G wrote:

OK, Wally - links to pix then!!


What, pics of the webcam?


And I'm going to have a poke about in the plate amp to see if I can
see why one channel is dead on the 'Hi Level' connections:


You'll be wanting your scope out, then...




I've had a poke about wiv me meter and it all looks OK, but summat's not
right - when the sound is routed out to the speakers one of them's severely
attenuated (barely audible) while the sub works fine. I've tried to find a
short but no luck so far.

The speaker connectors are on the board above the surprisingly large
trannie:

http://www.apah69.dsl.pipex.com/keit...ustedsub10.JPG


The amp side (fed from a Line In) is fine and it looks like the speakers are
a simple 'pass through' (??). I've put it back on the AV setup and it's
working very well (for a tenner.....!!! ;-) - any ideas? (I know bugger-all
about electronics and bugger-allē about SS circuitry!!)

Trying the other (perfect) sub on the audio has brought some startling
results. I might be about to change my mind about subs on audio and might
have to consider summat a bit more 'musical'....???

(Or swap the plate amps over leaving the dodgy amp in the OK cabinet for AV
use and putting the OK amp in a better box....)