2. amps-preamps
  3. 1265991113

Parallel Triode amps vs Triode wired pentode amps

Specifically a JJ 322 using parallel 300B output tubes ... do parallel triode present the same matching difficulties of SE triodes in that they are (generally speaking) optimized for single driver speakers or speaker with very simple crossovers??? Or, with the increased power output, do they work well with "average" sensitivity speakers??

In my case, I am considering the purchase of a used JJ 322. Not from a dealer so there is now way to audition at home. I am willing to take the chance on used gear, mainly because it can usually be sold at little or no loss.

My system consists of North Star 192 DAC and transport and Alon Exotica speakers (88db 7 ohm min, 10ohm max), Cardas cables througout. I have used push-pull tube amps (6L6GC, 28w/ch) with very good success but am looking for some of the "SET magic" (knowing a true SET amp besdies an 845 based model).

Have also been considering a Cary SLI-80 F1 triode as an alternative ... any comments on this amp appreciated as well.

Jeff
jrinkerptdnet

Showing 1 response by paulfolbrecht

paulfolbrecht
603 posts
 
Jeff,

Paralleled 300Bs do not drive speakers like a 211 or 845 SET despite the similar wattage ratings. A 211 or 845 will drive fairly easily a three-way speaker with mid-sized bass driver(s) as long as the impedance & phase are fairly benign while IME the parallel 300B simply will not. It will be non-optimal.

Parallel 300Bs or even a single 300B can work quite well on many mid-sensitivity two-way speakers that are an easy load (DeVore, Audio Note, etc).
More to discover