Synergistic Red Fuse ...

I’m surprised that the Had Inspire SEP amplifier mated to the Sonist speaker is such a large step above in SQ compared to the amplifier it replaced. Another example of the importance of power amplifier and speaker matching/synergy. The current edition Had Inspire amps probably have better transformers/power supplies than their earlier versions. Good news.
Charles

Yeah…this amp is surprising and I assume some synergy with the new biwire happened…or something, and I have a high threshold of surprise. Had states in the Youtube interview (and elsewhere, mostly his own hype when he lists stuff) that his transformers can run a small city at Xmas. Not sure if that’s relevant to the KT150 tube thing but I’ve read piles of threads on at least 4 sites about these amps, and will read more if I can take it…I’m flooded with info, but happily whatever tubes came with the amp seem to work swimmingly.

When I tried one of Dennis’ KT88 Fire Bottle amps a couple of years ago, I was told that the transformers in the KT88 would not handle the KT150 tubes. Even back then, Dennis was making amps with different (larger) transformers where he was running KT150 tubes in a SEP design.
His recommendation was to buy a KT150 Fire Bottle amp, with the larger transformers, if you wanted to run the KT150 tubes. Hence, upon Dennis’ recommendation, I never tried the KT150 tube in my KT88 Fire Bottle amp.

Of course, as you may know, I had NO success at all with the KT88 Fire Bottle amp with my 90 dB, 8 ohm Soliloquy speakers. I tried the KT88’s and 6V6 output tubes (Dennis’ favorite), but sadly neither worked well at all.
I have heard that some folks love Had’s Fire Bottle amps though, so there is much to be said about system synergy and varying tastes.

On the other hand, I have had success with SR Black fuses, so take that for what it’s worth. ;^)

Nice to hear Wolf is having audiophile shrangrala (that's from 3 dog night for you Wolf) with the new amp and some very nice speakers. Enjoy

Very possible the Sonist is an easier load and more compatible with SET/SEP amplifiers than the Soliloquy. Sonist was designed specifically to mate with these types of amplifiers from the very beginning.

Charles