So when you use the Myryad you bypass or don't use the BC21.1 ???
If so, I see your problem. The BC inverts, the Myryad does not. Therefore one source will always be out of phase which ever way you put the speaker terminals.
It does not matter where you invert the speaker cables (at the amp or the speakers); just don't do both, as you'll accomplish nothing.
If this is your problem may I suggest banana plugs for the speaker cables. It will then be easy to reverse the speaker cables depending on which source you are using (the BC or the Myryad).
I have no idea if I am right (check with Gilbert), but if you had him add a processor loop to the BC21 which will bypass the volume on the BC21, you could use the Myryad througth the BC, and the polarity will still the be same same (inverted going though the BC21).
If so, I see your problem. The BC inverts, the Myryad does not. Therefore one source will always be out of phase which ever way you put the speaker terminals.
It does not matter where you invert the speaker cables (at the amp or the speakers); just don't do both, as you'll accomplish nothing.
If this is your problem may I suggest banana plugs for the speaker cables. It will then be easy to reverse the speaker cables depending on which source you are using (the BC or the Myryad).
I have no idea if I am right (check with Gilbert), but if you had him add a processor loop to the BC21 which will bypass the volume on the BC21, you could use the Myryad througth the BC, and the polarity will still the be same same (inverted going though the BC21).