Ralph do you know of anyone running any of your amps with a nola speaker?
I've heard of it but not heard the combination myself. I do know though that most of the Nola's have dual woofer arrays, expecting the amp to double its power into the lower impedance. Makes it tricky for a tube amp to sound right, but if I recall right, our customers using the Nolas are also using a set of ZEROs to help tame that.
http://www.zeroimpedance.com