[Bob Urz]

wrote:

Hello all,
First, I like my 901s regardless so no flaming please.
I need help with this condition:
I have two sets of 901's. One pair of series IV and one pair of
series VI, both with the matching Bose EQ.

My problem is that some CD,s and even some passages on soother CD's
cause distortion when using the EQ. This can be at any volume level.
I have only had this problem with recent CDs. (Diana Krawl, Chris
Botti) All my older CD's and the radio plays fine and loud. I have
tried different recievers, CD decks and even replaced all the caps in
one of the EQs. Anyone else having issues or know where I can find a
service manual for these EQ's?
Really appreciate the help

Are you 100% sure your surrounds on your drivers are not falling apart?
Common problem on 10 year old Plus speakers. The voice coils rattling
around at high levels will certainly sound like distortion.
Take the grill covers off and inspect all 16 drivers closely.

The other thing you can do is bypass the eq and see if you still have
the distortion. If its still there, its probably not the EQ

Bob