Who makes the highest quality tube amps?

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.

Joule is another name to consider.

AUDIO NOTE!

Bobheinatz, I went the el-34 because it had more bass slam and dynamics then my previous 300b amp while maintaining all the SET magic. I switch between NOS Amperex and Mullard xf-1s which helps. I had their 300b version in my system for a few weeks and it is also outstanding. They share the same class A3 circuit. I don't think you could say one was better than the other, just different flavors due to the tubes. I was worried I would start buying $2000 Takatsuki tubes and coming from 300b wanted to try something different. I have also had the pleasure to hear the 45 in Jack's
home system. Quite an awesome little amp just not enough power (1.5 watts) for my speakers. Let me add that Jack and his partner Tony are an absolute joy to deal with. Jack is so humble, without perusing an old online interview I would not have known he worked on the NASA Gemini project,
was a recording studio engineer, holds multiple amp circuit patents, and hand winds the finest transformers. It is guys like Jack, Ralph of Atmasphere etc. that make this crazy hobby great.

Auntjenof2,

Thanks for your detailed reply. I am going to take a serious look at the 45 & 300b amps.