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Chris Morriss Chris Morriss is offline
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Default Bose 901 EQ distortion

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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


Perhaps the high output signal is overloading the input on the
equaliser. Can you make up a simple 6dB pad (a couple of 10k resistors
in an 'L' network for each channel)? This may drop the signal enough.
What is the input spec for the equaliser? Modern highly-compressed CDs
may be putting out 2V rms or so and that may be the problem.
--
Chris Morriss