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
Many recent vintage CD's are mastered LOUD and compressed. May be a maxxed
out, clipped signal being fed to the EQ, or the EQ may be running out of
headroom, again because of the nature of the signal itself. One would need
to look at the signal with an oscilloscope at the input of the EQ, at
various points inside (at the output pins of the various op-amps inside for
example) and at the output of the EQ itself.
If the signal is reaching the box that way, you may need a different source
unit since the clipping may be occurring there or for that matter might be
coming out of your CD player that way.
Mark Z.
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