The VAIC 520B output tube can deliver 30w in single SET (in the Classic 52B VAIC amp), and 55W in double SET (in the Reference 52B). VAIC also puts out a 320B double SET (Reference 32B) with 40 watts. The tubes are made in the Czech Republic, and the amps are hand-built in Vicenza Italy by MasterSound. Prices vary from $15,000 to $22,000 approximately (thus, out of your price range, but a few pop up in the European second hand market from time to time, at substantial savings). These amps are very controversial (I once had a conversation with Dr. Kron of KR about the merits of VAIC tubes; and there are some controversies about the Audio Note/VAIC joint venture as well...), but, with modifications, these amps equal the performance of lower wattage SETs, yet can drive "normal" (low efficiency) speakers. I own the 52B variant, and drive 87 dB speakers with no problem. The other alternative I would suggest are WAVAC amps (second hand, if you are lucky).
Recommend Higher Power SET Amp
I am searching for a new amp. I own the Coincident Super Eclipse speakers (92db sensitive, nominal 14ohm, minimum 10ohm), so accomodating a tube amp should be easy. My pre-amp is a Rogue 99. I borrowed an Antique Sound Labs KT88 based single ended pentode amp (15 watts) which convinced me single ended tubes are the way to go. Only problem was, although the ASL amp provided enough power for 90% of my listening (mostly classical and jazz, with some pop/rock), at times I like to turn it up a little, or listem to some large scale orchestral pieces (Mahler, Bruckner, R., Strauss) at more realistic levels. The speakers don't mind a bit (having used a 100 watt SS amp at times), but the ASL ran out of gas.
So, the question is, can you tube afficianados recommend some single ended tube amplifiers with ratings over 30 watts per side? I know of the Cary 805 monos, but I'm looking for something more affordable. All brands welcome to apply. Thanks in advance for any ideas!
So, the question is, can you tube afficianados recommend some single ended tube amplifiers with ratings over 30 watts per side? I know of the Cary 805 monos, but I'm looking for something more affordable. All brands welcome to apply. Thanks in advance for any ideas!