A push-pull tube design and Single-ended class A designs


Hello,

Between a push-pull tube design and Single-ended class A designs amp, is Single-ened class A better in sound quality, why?

Regards,
Eddy
eddy1
Based on the specs of the speaker an SET is out of the question!! You would want a speaker that is at least 10db more efficient with most SETs made. The recommended minimum power is 40 watts, which is a **very very** large amount of power for an SET!

The best SETs seem to make no more than about 7-10 watts; the turly best of them make considerably less (the less power they make, the better the bandwidth, but as you can see the greater efficiency is needed in the loudspeaker).
Eddy,
Given your speakers, the Cary integrated amplifier would be a more satisfactory match. IMO  the single ended Inspire isn't powerful enough to manage your speaker's load demands. Technically this amplifier is a SEP (single end Pentode)rather than a true single ended triode (DHT). The Inspire is built with cost restrains in mind. It doesn't have premium transformers or an exceptionally stout power supply. It's a nice choice  for very easy to drive speakers however.
Cary SLI-80 integrated amp would be the better choice for those Sonus Faber Venera 2.5 speakers, IMHO.

I had speakers with about the same measurements as yours, and tried one of Dennis' KT88 Fire Bottle SEP (Single Ended Pentode) amps. I really wanted to like it because it was so conveniently small, and inexpensive and I thought it would mate well with my Had designed Cary SLP-98P F1 preamp. However, it did not turn out well at all. Soundstage was very compressed sounding and rolled off sounding on highs and lows.

Dennis was very helpful, and did send me quite a few tubes to try to help open it up. In the end, nothing seemed to work. Dennis is a great guy though, and has an infectious love of this hobby. He did refund my money, so I have no qualms.

I did read of others who loved the amp, some with speakers that were even more difficult loads than mine (90 dB, 8 ohm). This is a strange hobby indeed.
There is no such thing as the best in this hobby. It all comes down to personal preference. Based on my experience. SET and single driver speakers excels in jazz and classical music but sucks in other genre. I don't listen to classical so my choice is Push-Pull that gives me the slam I like specially with rock and r&b and still able to enjoy the sweetness of jazz. Hope this helps.