Regarding loudspeaker matching, 805 and 845 output tube designs are available with 40-50 watts/channel. I recently bought a pair of Ming Da MC805-A monoblocks from Coem Audio in HK for under $1400 shipped and have been most impressed. Their 50 w/channel produces formidable and articulate bass from my 91 dB @ 8 ohm 3 ways with 10 inch woofers. No manual/customer support were potential downsides and you must be competent at opening up the bottom and biasing output tubes with 1000 volts nearby. ASL has a model with outside bias meters, occasionally for sale used in the $1500-$2000 range. The upside is SET sound with preserved dynamics at quite loud volumes out of many full size "conventional" multidriver dynamic loudspeakers. It doesn't hurt that NOS 805 tubes can be had for $60-$100. Surely not the "magic" of transformer-coupled 300B amps, but just as surely the SET "family" sound in a far more affordable/versatile package.
