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The design of many amplifier stages result in inverting the
polarity. Your common everyday "op-amp" is most likely
inverting.
A preamp may have several stages - and if it has an odd
number of inverting phases - then the preamp as a whole will
be inverting.
Nothing really unusual about the AES preamp in question
here - except that the manufacturer leaves it to the
user to correct the polarity - rather than reverse
wiring some connnection themselves.
Dr. Gregory Greenman
Physicist
The design of many amplifier stages result in inverting the
polarity. Your common everyday "op-amp" is most likely
inverting.
A preamp may have several stages - and if it has an odd
number of inverting phases - then the preamp as a whole will
be inverting.
Nothing really unusual about the AES preamp in question
here - except that the manufacturer leaves it to the
user to correct the polarity - rather than reverse
wiring some connnection themselves.
Dr. Gregory Greenman
Physicist