Yeah, I spent some time with it there too. It was paired up with a Questyle CMA800i DAC/Amp combo and a LH Pulse X Infinity. I used an Anax-modded HD800 off another enthusiasts table, a pair of Zach's ZMF Blackwoods, and my modded* HD650s (balanced)/LFF Paradox (SE)/Oppo PM-3 (SE). Music was fairly limited as most of Axel's music was still on his NAS but there was enough available to get a pretty good demo. Here's a shortish review based on the time I spent hogging it:
1. I preferred the LC on the Questyle. I never thought I'd ever say this about a Sabre implementation but the Infinity's treble was a bit too laid back when paired with the LC. The Questyle's Wolfson implementation hit it just right. I wish I'd have been able to pair it with my Gungnir and a decent R2R DAC (like the Yggy at the other end of the room that Steve brought on a UPS to keep warmed up), but meet conditions, time, etc. etc.
2. I was expecting the amp to be a bit warmish from the impressions I've seen so far, but to me it wasn't particularly tonally colored. That's not to say it didn't have a signature or character of its own that it imparts to a unit...it does. But I wouldn't be worried about the LC making a warm rig sound gooey, syrupy, or overly romantic. At the same time, I wouldn't use the LC to tame a bright DAC or headphone. It's just not going to do that. Stock HD800 owners that are hoping for some treble relief should probably take note. Anax-modded HD800 does fine.
3. Given meet conditions and lack of access to my own test tracks and gear, I wasn't able to ascertain much about micro-detail retrieval, resolution, plankton, etc. Suffice it to say though that I didn't hear any glaring omissions or red flags. This is even with the HD800 which is the closest thing to an audio microscope available.
4. I noted above that
from what I heard the LC does impart a character of its own. With each headphone I used and with both DACs, the common change from what I was used to was a dramatic improvement in macrodynamics vs what I was used to. The Paradox and HD650s are normally laid-back headphones, but the Liquid Carbon brought them both to life. The Oppo PM-3 too has a relaxed sound. A number of reviewers (including Tyll
here) have even called them boring - which isn't inaccurate given their laid-back top octave and lowered 4-8k range. The LC gave the PM-3 some pep and energy. The Blackwood, which Zach tunes to be more punchy and energetic relative to LFF's laid-back sound, could be down right ******* startling out of the Liquid Carbon. In a "for those about to rock, we salute you" kind of way.
Wha huh? Rewinding a sec. Ok, breaking down what "improved macrodynamics" means in terms of the listening experience:
- Everything seemed more present and impactful;
- Large, sudden contrasts/changes in volume happen with more energy and snap;
- Instruments hit harder when needed. Instruments, for me, happens to include the human voice as well.
Lets take this from yet another angle, because I want people to get what I'm saying here: Generally, when people give their impressions of audio equipment they might talk about "bass slam." Bass slam is a type of macrodynamic expression, but only on a single tonal range/register (generally mid-bass centric). "Rumble" is another - its the feeling of macrodynamic presence coming from low-bass or sub-bass impact and presence. But
nearly every tonal range and type of instrument can be thought of in this manner with various levels of descriptive success. Imagine the jolt of a harmonica in a Blues Traveller or Bob Dylan Track. Or the ring of crotales cymbals on the opening of Rush's "YYZ". Or the strike of crash cymbals in the introduction to The Who's "Baba O' Reilly". Or Steve Perry's voice when he digs deep and belt out notes in his highest range. Or the opening guitar riff on Derek & the Dominos "Layla". Or just about everything on Zeppelin's "Kashmir".
I could keep going, but I'm hoping that this gets the point across.
The great thing about the LC from the time I spent with it is that it only brings the powerful, prominent macrodynamics when called for. Some audio gear** does it all the time which cab make music sound shouty or "arena rock"-like. Other gear can sound punchy and aggressive as its normal character (see: the Sennheiser Amperior, for example). Neither of these are the case with the Liquid Carbon.
5. I've never heard an amplifier in this price range or size do #4 this well. This is one of those character properties that people shell out huge money to obtain. (I'd say that powerful macrodynamics, tonal & timbral correctness, and micro-detail extraction/plankton are the big three that make people open their wallets.) I generally associate powerful macrodynamic capability with power transformer size and quality. The Schiit Ragnarok does it. I've heard balanced Dynahis do it. IIRC, it's been a while, but I'm pretty sure I've heard Krell KSA-5 Clones with elaborate separate PSUs do it. I'm not sure what voodoo Alex did to fit this kind of sound into this kind of box but I'd check him for Pym Particles and an Ant-Man suit.
TLDR: The Cavalli Liquid Carbon is one phenomenal amplifier. He could have charged twice the price and it still would have been a good value. Anyone who preordered this is in for a treat. I didn't hear a bad pairing with any of the five headphones that I used. Get the best DAC you can budget and grin like you robbed a bank.
P.S.: When I got home, I did the only sensible thing and immediately purchased an LFF/Enigmatic Audio Enigma off of the "For Sale" forums to go with my Paradox, PM-3, and HD650. The Enigma's biggest sin of omission is its laid-back nature (a 1-4k recess). I'm betting this pairing with the Schiit [Redacted] is going to be bad ass.
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[*New model with silver drivers and good condition pads. I've modded my HD650 by
removing the back damping and quarter modding the front foam. The net result of these mods is that the HD650's bass hump is pushed lower and it no longer sounds overdamped. It's still a dark, slightly laid-back headphone but it sounds a bit livelier with the mods. As a result, YMMV with regards to my impressions with the HD650.]
[** For example, the Schiit Gungnir pre-USB 2.0 had that problem.]