What is the best phono preamp you have heard?

www.wnaudio.com

Beat the groove I had previously.

LAMM LP2 is an amazing unit, not adjustable, but works with everything at a very high level, yes, I think, that's one of the best out there, very silent and for the adjustable transistor units, the Klyne 7 PX closes the gap between tube and transistor.

Best phono preamp and moving coil section I have had is the
moving coil card or input which Levinson put in his preamps.
Lots of adjustments and tons of gain without hum. Plus it
sounded super. I think the sensitivity of the input is
critical to the sound you get: too little and the sound is
dark and not dynamic or even might be peaky; too much and
the overload is prominent on peaks. Close to the Levinson
have been transformers which match the cartridge used; a
hum problem at times, but usually can be worked out with
grounding and careful placement of the transformer.
CEM

I'm a statified Herron owner who gets to hear the seemly top two contenders (the I/O Sig & Lamm) on a regular basis. I never come home after hearing either the Lamm or I/O with preamp envy. I like the no fuss aspect of the Herron's. The Herron's are at their best with current production tubes and are easy on them. IMO, the Herron's are under appreciated in audio land.

Nothing can beat the midrange of the BAT VK-P10SE SUPER PACK.
Yes, not even the Aesthetix IO Signiture. I heard them both.