I love the warmth hi-fi tube amps give...with a nice saturated mid range that sounds really wonderful.
I have yet to see a TUBE POWER AMP for Pro Audio. Every amp I saw to date is solid state.
I realise that Tubes have a life span and the possible hassle of changing it in the middle of a SHOW is real....but other than that.. I wonder...why is there no TUBE POWER AMP for FOH?