Well, Elliot, your post on the L10 has prompted me to share my series 10 impressions. I was running with D'Agostino Momentum HD pre and S250 stereo amps in a system that I had spent the last year dialing in. That system config sounded pretty darned great, just music all the time, and I wondered why I'm not leaving well enough alone. But I'd read of some real love for the M1.1 vs. the S250, and the M10 was clearly a significant step up from that, and I'm an audio nut, so.....
I got the M10 in my system on January 25, and it was already "run in" by my dealer's use, not much break in would be needed. The L10 arrived February 25 as a new unit needing some run in. Right away I heard some excellences in the M10 vs. the S250 while being fed by the Momentum HD, but it did move my system balance off center just a tad, as any important component change can do. When I added the L10 into the system, I again could hear some real potential excellences, but that second change moved the system voice too far for me, making my system not so musically engaging. Clearly, and not surprisingly, I had some system work to do to get this new grouping to sing. I think the principal challenge for me is that the TAD speakers I run need a little enriching for my tastes, and the D'Agostino gear seems voiced with a little bit of just that, whereas the CH Precision gear does not - - it seems dead neutral. Tubes, cables, tweaks would need to be evaluated, it seemed.
The immediately apparent excellences are in the unraveling of musical information in every line, a greater digging into musical info in general, a sense of a clearer voice to the music, and BIG space. When I hooked up the L10 working with Ralph Sorrentino on the phone with me I tried a favorite orchestral test track and was immediately struck by the nuanced presentation of massed strings, with tonal separation and sense of voices in the violin "choir", as it were. I'd never heard it like that before on any system. The CH Presion gear really works a treat there! And this same revelation of inner detail on a micro-harmonic level is done on all music. You simply "feel" a clearer sense of the voices and musical lines. And there is much space with more holographic fill, again feeling very clear and natural. My D'Ag based system was pretty good at staging, too, but the CH is levels above.
I am mostly listening to my digital these days (really busy with work, so flipping albums feels like too much???), and I started rolling tubes in my Pacific DAC. I have 10 rectifiers and 10 pairs of quality DHT's to try, so I rolled 'em. I started working with the richer sounding ones (300B types) and assorted rectifiers, and while they got more richness into things, they all were sounding like "too much of a good thing", rounding, dulling and thickening too much. Then I remembered: I should try those KR 242's and PX-25's that couldn't work well with the D'Agostino HD pre because it over-drove it causing distortion (same problem with an ARC Ref 40 that was in the house before that...). Ked kept emphatically stating that, if your preamp can work happily with the 242's, it's tough to beat them in a Pacific. Well, the L10 can handle the 242's just fine, and HOLY CRAP was Ked ever right! Suddenly, my system is sounding crazy great, like "laugh out loud" outstanding all the time! My wife is NOT grooving on this, as I'm being too absent.
The really interesting thing to me is that the 242's are definitely not a richer sounding DHT, and are, in fact, a bit to the leaner/brighter side, IME. Their addition should have been a nudge in the entirely wrong direction, I had presumed. Regardless, my system now sounds as "right" as it ever has, with space all over the place (ah, Sam Tellig!), gobs of musical detail, and all sounding harmonically so right! I'm now thinking that my TAD's aren't "too bright", say, but that they show what your system delivers, and the CH Precision gear just delivers a purer signal that doesn't get your ears on alert, but, rather, lets your ears relax and enjoy the music when it's there. I usually attend 30+ classical concerts a year when a pandemic doesn't reign, and my wife plays a beautiful melodious Steinway A3 in our living room daily. Live, unamplified music is a constant in my life. With these references always at hand, I find that I respond to a sense of timbre in musical reproduction more than anything else. My system with this 10 series is delivering beautifully developed timbre that is so natural sounding to my ears. And, even though there is no mistaking recording quality or lack thereof, it isn't punishing to listen to poorly recorded stuff (if you like the music!) - - that is far from a given, IME, and quite a blessing in this case.
Well, I've waxed enthusiastic longer than I had planned. Bottom line: I'm confident that I'm only starting on the refinement of my system with the 10 series in place, but I am just tickled that I took the plunge. Now I've got to hear those Goebel speakers you've got there...