atenuation should be done so that 100% volume corresponds to how loud
you ever want to listen.

before i got my present speakers , I used inline atenuators before the
poweramps except one of them had selectable selectivity ( wich i think
all power amps should have ). 

This was a much better match for my preamp/processor .

as you have a passive pot you could use it to tune in a suitable
damping and then use the TP's volume .
or a combination of both .

potentiometers, they are not so linear in the low range channel
tracking could be bad at that end, here a stepped solution could
improve.

This where jumper + digital volume is an improvement you would always
have the same volume in rigth and left channel .
with very good pots as the alps this is less obvius, better tolerances
but at a price.


-- 
Mnyb

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