Parallel SET amps lose much of the magic of a single tube SET.
I'd suggest a quality push/pull interstage coupled 300b or higher powered SET with a 211 or 572-3 tube. The 211 can provide up to 30 watts from one tube in class A2 mode; it operates in A1 most of the time, of course, going into A2 for dynamics.
I'd suggest a quality push/pull interstage coupled 300b or higher powered SET with a 211 or 572-3 tube. The 211 can provide up to 30 watts from one tube in class A2 mode; it operates in A1 most of the time, of course, going into A2 for dynamics.