Bombaywalla,
thanks for the information I have been to those websites and know they recommend against using 32 ohm cans with the Crack unit I was just curious (and hoping for better news) as to what happens in the circuit and you cleared it up nicely. I would prefer not to tax the tubes
I have decided to buy the Sennheiser HD600s and the Crack so I can hear for myself the two together.
Phil