Hi, purrin
And according to you, what is the best amplifier currently in production to work with the most successful and the better synergy with the SR 009?
Electra?
BHSE?
LL2?
727?
Other?
To begin, I'm actually not a big fan of the SR-009, particularly with the tonal response. As far as its "get-of-out-the-way" and what I suspect, very low distortion characteristics, I am amazed by the SR-009.
Of the choices above and with the SR-009, I would choose the Electra with EL34s (not 6L6s, while I feel the 6L6s are more neutral and actually my preference as a tube, the 6L6 does not play well with the tonal characteristics of the SR009.) With a typical modern sounding sigma-delta DAC as the source, I would forgo the capacitor upgrade and stick with the standard cap for a slightly thicker sound. I am really nit-picking here, and can probably go either way as there are pluses and minuses with either approach.
The LL2 would be next on the list. I actually consider the LL2 on an equal overall footing with the Electra, but it is a different sounding amp. (what do you expect with SS vs. tubes?) I know in the past I had recommended to people who asked me, that the LL and SR-009 was indeed a synergistic combination. The LL2 however is more neutral and extended sounding than the LL1 (which as some have indicated, had issues reproducing the extremes.) In essence, the LL2 is slightly brighter than the LL1; and I actually feel the LL2 and SR-007, especially the more tame mk1 edition, a great match. The LL2 driver control is much better than the LL1 too.
The BHSE / SR-009 combinations I've heard were always too bright and etched, especially with a typical digital source. And at the risk of being tarred and feathered, I've always felt the BHSE, in similar vein to the KGSSHV, sounded dynamically flat and boring, though not nearly to the latter's extent. There's a reason why I cancelled my BHSE order. It's hard for me to say his because I know Justin @ Headamp in person, and he's a always been a really nice fellow to me. There any many others who would disagree with my assessment, and I'm sure they would be willing to provide their own counterpoints.
I hate to say it, but I actually kind of like the 727 with the SR-009.
Being a fan of SETs (i.e., EC BA, Apex Pinnacle, Manley Neo-Classic, etc.), I kind of quit 'stats because I never quite found the right amplifier for them. Not a fan push-pull which always seems to remove some information in the recordings. And given their nature, 'stat amps seem to require three or four stages with some negative feedback applied to the circuit. LOL, ironically, I guess this makes me a "wire with gain" guy based on preferring circuits which look and work more like wire with gain; although one can argue the reactive components, the caps and the coils commonly used with SET designs do muck things up.