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This one is probably "C" or early "D". The "line in" on this particular module is transformer based, and it has brown face, so it looks like "D" butram75 said:If it's like the 500 B channels strip I have, it's really an amazing sound!
Won over my API 3124 on acoustic and electric guitar and Piano!
Headroom for days, great eq
Very pure, at least on mine.
I'm in love with that thing
syn said:This one is probably "C" or early "D". The "line in" on this particular module is transformer based, and it has brown face, so it looks like "D" but
topology is closer to earlier models. BTW there are no big differences topology/parts wise among any of this modules apart from IC based line in on later (D) modules.
They run on +/-32-36VDC, have huge headroom and sound very nice. Most of the "D" series have IC based line input.