Check out the Consonance lineup.
Harry- if you can stretch it to ~ $3,600-$3,700 USD, a used Art Audio Jota would be an excellent choice, although it is a stereo amp. A buddy of mine who is local to you and I (just outside of the GTA) has one he may be willing to part with as a possibility- there is also one on Audiogon right now used, but higher $$$. Alternatively, if you want IMO the best stereo SET amp at ~ 20 watts, my Wyetech Topaz is pretty damn good, but it's 572/211, not 300B. And my buddy and I also use Coincident speakers. Too bad they have to be monoblocks... Well, you could always take a look at Israel Blume's (President- Coincident) new 300B monoblocks that are coming out- the design is very good and he is using primo parts as well- not sure abotu pricing though...
Singled Ended 300B PowerAmp are common in many manufacturers with excellent performance. outputpower
12-15 watts usually.
Push-pull 300B's numerous Manufactgurers had failure
as theirs usually loose the vocal clarity and sweetness
as single end items ( more easily built, I supposed).
I had searched for years, whilst still using single-ended
until I met Canary Auidio, CA303 signature ed., (they have the new CA330 now,) if you upgrade the rectifier tubes, 6SN7's etc.
performance will be even further amazingly good.
Their Dual Mono Block Tube_PRE-amp's are very good too.
Mono-Block's plus separate L/R Power supplies in 4
chassis /set. place 1 x nice 12AX7 on each side instaed of
factory-supplied "sovltek". you will not be disappointed.
I have the Triode M300Se monos and can attest to them being both beautiful sounding and looking. They are driving Micropure Kotaros (4 Ohms - 84 dB/1M in a small room) and have plenty of power and a wonderful balanced tone. There's never a shortage of "I never heard that before" moments with performers regularly stopping by only a few feet in front of me.
They'll be staying put for a long, long time - highly recommended.
I wouldn't advise driving 92dB full-range speakers with a 300B SET amp, because you're gonna' clip and destroy the drivers eventually.Depends on the size of the room and what volume you listen at. I have Coincident Super Eclipse IIs with Welborne Labs Laurels, WE 300B valves. I live in an apartment so don't play my music particularly loud.
6 years and counting.
Here's some good info on clipping:
I try to avoid clipping. The efficiency of my Tannoy DC's is above 100dB; and I drive them with four 300B SET amps, bi-amping through a Marchand external crossover.
The OPT's and compression horn tweeters are so expensive that I hope never to fry them.