These are two Lamm amplifiers for consideration.
MONAURAL POWER AMPLIFIER
Pure Class A hybrid amplifier producing 110 Watts into 8 AND 4 Ohms, 400 Watts into 2 Ohms, 600 Watts into 1 Ohm (continuous). Features hybrid vacuum tube/sold-state design with one specially selected 6922 vacuum triode. 12 high speed MOS-FET output transistors, no overall feedback. Switch-selectable bias/voltage settings for 8- or 4-Ohm operation. XLR and RCA inputs; 2 pairs of binding posts. Remote control: power on/off.
While this amplifier doesn't "technically" meet the all tube amplifier thing, I'm sure it not only meets it "sonic wise", but exceeds it. Tube amplifiers have every thing except the "bass slam" of well known SS amps. I've noticed this when I paired one of the best tube preamps with a very transparent SS amp.
While we all agree 100% in regard to the sonics of all tubes, they lack that little tiny bit of "bass slam". I believe Lamm's design with the best parts available will give me all the sonics I desire from tubes, as well as the bass slam of SS.
My desire is not to just have a tube amp, but to get the liquid sonics plus the "bass slam" of Krell, which is not on my list of preferred amps, but it's got that "bass slam".
MONAURAL POWER AMPLIFIER
Single-ended tube amplifier producing 18 Watts continuous into 16/8/4 Ohms. Pure class A operation. Regulated power supply. High current low impedance output triodes (6C33C) in the output stage and in the voltage regulator section. XLR (pseudo-balanced) and RCA input connectors. Multi-turn trimming potentiometers for setting the nominal value of plate voltage and plate current of the output tube.
The input stage has been totally redesigned and is based on the topology developed for the ML3 Signature amplifier. The result is a perfect fusion between the ML2.1 and ML3 Signature.
Now this low power amp meets the all tube thing if you got the right speakers. I believe either amp could work depending on the size of the listening room; that would determine absolute power requirements.