there is a pure tube amplifier that is high powered and extremely inexpensive for the power. That amplifier is a Antique Sound Labs Hurrricane. The Hurricane pumps out 200 watts ultralinear power and the sound was as good in most cases as my VAC PHI 110 amplifier which costs $10,000!The magic of the VAC Phi 110/110 is revealed when running in triode mode rather than pentode mode (ultralinear). This feature, and the ability to run the PHI 110/110 with or without zero negative feedback are two features that separate the VAC from the pack, IMO.
The VAC PHI 110/110 in triode with zero negative feedback is the preferred configuration for most owners.

