Hi Jack,
I understand that the amplifier is fully balanced, but why does it feature an RCA input when it doesn’t result in a hum free connection?
I had a couple of high end amplifiers in the past, of which none were burdened with any hum to my recollection when connected via RCA.
Maybe the were not fully balanced, but I believe they were!? I had a Mark Levinson 333, as well as a NewClear NC1000L and also a pair of Emotiva XPR 1in the past, and they were quiet without hum using RCA as far as I remember.
Well, if the BHK doesn’t like RCA connections, I guess my only two choices are to dump the BHK amplifier or the Mystere preamp.
Thanks for your help.