Mike Rivers wrote:
I doubt that any of them use better than
1% tolerance resistors. This could unbalance the input to the preamp
and reduce the common mode noise rejection, but if you're feeding a
huge signal voltage to the preamp, this isn't likely to be a concern.
Doesn't the usual configuration for a balanced pad involve no ground
connection? In that case any common mode signal will hardly be
attenuated at all by the pad, and hence there will be negligible
unbalancing of it either.
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