Clint,
Very nice review. Short and concise, just the way I like them.
I only wish you had posted specifications, for although Charivari risked a guess your beauty could push 15 watts / channel, we are left wondering. I would venture 10 / 12 watts.
I won´t say anything about the build and finish. The pics, although you were all nervous and shaking when you took them, speak for themselves.
It seems to me that like Mr. Pig and myself, you too, are a tube convert.
You see, I don´t want to add any fuel to the SS vs. Tube debate here, but it appears there are some of us who will just never go back after being treated to something close to audio nirvana with the sound of tubes.
Your modified Rogers LS-55 CE speakers ( CE standing for Clint E. to me ) seem to be just the ideal partners for your new amp. The increased volume of the box might have increased the nominal efficiency of 90 DB / watt, even if only a little bit, but, more importantly, your removing the port, and turning these speakers into Infinite Baffles , might have made it easier for a small tube amp to control those double woofers. Compared to SS amps, the Damping Factor of a tube amp is always lower, and Acoustic Suspension ( or Infinite Baffle ) helps in controlling the woofers, though usually the cut-off frequency won´t be as low.
The all important mid-range is where, for tube lovers, tubes are unbeatable. All instruments come alive and more tri-dimensional, in a way even the best SS amps can only hint at. Notes hang in the air with far more natural decay charachteristics.
I saw you felt that at the Lisbon Audio-Show last year when listening to the Prima Luna amp with those Sonus Faber speakers that really excelled in the mid-range.
The big Krell / Wilson Audio system next room didn´t impress either of us much.
Rogers speakers always excelled in the mid-range, in the true BBC tradition. Bextrene or polypropylene woofers can sound a little sluggish if pushed too hard, but sound just gorgeous when driven within their limits.
I believe you got system synergy. A stroke of luck? Maybe, but thank God for that.
Now, with your 2 / 3 way 24 DB electronic crossover and another more powerful tube amp, I can see you going the active way.
Mr. Pig is absolutely right IMHO too, when he says SET is a whole different cup of tea, but let´s leave that for another time in the future, shall we? Just enjoy what you have now, and keep us posted on your impressions.