High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place.

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RE: enough power?

Posted by drlowmu (M) on November 16, 2014 at 10:19:06

In Reply to: RE: enough power? posted by rws on November 16, 2014 at 08:24:27:

DHT stands for "directly heated triode", an early / simple design where the filament was the tube's cathode. ( These tubes use a 4 PIN tube socket. ) Many consider these earliest of triodes to sound a BIT better ( more direct, if you will ) than triodes with cathodes, separate from the filament supply.

Such tubes, used in the output stages of amps for efficient speakers, include the Type 45 and the famous 2A3 tube, my two favs.

Most low powered audio SE amps come in three stages, (1) an input tube (2) a driver tube and (3) an output tube. It certainly does NOT need to be that way, three stages. A two stage amp will omit the number two, or middle stage, be just an input tube and an output tube. IF done properly ( a big word..."if" ) the simpler circuit will sound more transparent than any three stage audio amp in existence.

Good questions you asked !! Hope it helps. I owned K-Horns years ago. Do ALTEC A7 trip now, all good stuff. Amps are the weak link in my opinion.

Jeff Medwin

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