I read in sci.electronics.design that Pooh Bear rabbitsfriendsandrelati
wrote (in ) about
'Reducing hiss by changing op-amps ?', on Sat, 19 Mar 2005:

Simplest substitution option is the very much better 4560 also from JRC.

You might with advantage suggest which ones are likely to benefit most
from substitution. I can't decipher the schematic clearly enough to do
it.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk