Wyred4sound
------------
input impedance - 60Kohm unbalanced (tube pre-amp friendly)
stock Icepower module power supply
BC refXXXm series
-----------------
Input impedance - 100Kohm unbalanced, 200kohm balanced (very tube pre-amp friendly)
proprietary BC power supply module replaces power supply onboard the standard Icepower module
Other Amps (including all other non refXXm series BCs) using stock Icepower modules only
--------------
input impedance - 10Kohm (not so tube friendly in general)
standard power supply onboard Icepower module
------------
input impedance - 60Kohm unbalanced (tube pre-amp friendly)
stock Icepower module power supply
BC refXXXm series
-----------------
Input impedance - 100Kohm unbalanced, 200kohm balanced (very tube pre-amp friendly)
proprietary BC power supply module replaces power supply onboard the standard Icepower module
Other Amps (including all other non refXXm series BCs) using stock Icepower modules only
--------------
input impedance - 10Kohm (not so tube friendly in general)
standard power supply onboard Icepower module