sir Edrel,
here are my listening impressions regarding your new OPT design for 6F6G/6AR5 single ended, ultra linear mode. Driver used are a pair of Onkyo D-032ax BS, a lowly J-WIN cd player, typical uninsulated room measuring 20m X 20m, under the ff. conditions:
1.these are subjective listening, my listening prefferences might be different from others.
2.I dont have sophisticated equiptment to measure different parameters, all that i have is a ten years old FLUKE 177 dmm & two trusted averaged sized ears.
At power on, not a hint of hum, (i know tube amps have some degree of hum, but this ones dead silent) maybe because of modern electrolytic used in the PS, or the single point grounding I implemented, or the characterestic of 6AR5, even foreign builders observed.
Here are the test CD's:
Track 1 Yesterday- the "twang"as they hit the base string is more vivid, you can picture how the fingers slide through each fret.
california dreaming track-Jose Feliciano's rendition is full of emotion, vocals and the way he pronounced is very clear
one of my favorite cd's.. David Benoit- the attack and decay as the piano keys hit the string is well defined.
Astrud Gilberto- The Diana Krall of her day, the track "A Certain Sadness" leaves you no option but to close your eyes.
Nutcracker - DEUTCHE GRAMOPHON- employ the best recording technique- full orchestral at its finest, you'll never missed hearing each individual instrument
