Looking for an incredibly dynamic preamplifier

never heard the Wyetech, but the Cary SLP-98 with oil caps and direct coupling has balls to spare. Big, vivid sound. of course, NOS 6SN7s are de rigeur.

I haven't heard one, but I would have thought that someone might have suggested the Aesthetix Callisto with dual power supply?

For speed and dynamics, I like the Placette Active (I have that as my backup linestage); it is not bad in all other respects.

Having heard the Naim 252, I bet the much more expensive 552 would be a winner in this category as well.

Among the better linestages I've heard are the top of the line Audionote (uk), Kondo and Emotive Audio linestages. I am about to audition the Emotive Audio Epifania in my own system, as an alternative to my current Levinson No. 32 (a bit of a slug in the speed department, but otherwise respectable). I've heard the Epifania before and thought it was a real winner, but, until now, it did not have remote control of volume, which is a minimum requirement for me. Neither of these call attention to speed and dynamics, per se, but once you've heard them in appropriate systems, you will understand why that kind of parsing of performance characteristics is irrelevant.

I have not heard the Wyetech Opal, but a friend who owned one of their amps liked the linestage as well.

Good luck in your search.

Larryi
I tried an original Emotive Audio Sira in my former system and really liked it. I've always wanted to try the Epiphania. Please let us know how it compares to the Sira LE.

Dave Davenport's design would fit your bill; if you are willing to get your hands dirty and build one. It's a differential parallel feed design (the bias current and the audio signal share only one devise, a 6N1P triode). It's tranfomer coupled on both the input and the output using the excellent Lundahl amorphous core trannies. The input transformer does the phase splitting chores for the differential gain stage. I don't know if you are aware of the fact that most op amps used for the input chores on balanced amps and preamps have a rather low CMRR (common mode rejection ratio). Transformers have a high CMRRs; plus they provide absolute galvanic isolation between your sources and your amps (ground loops are NOT an issue). I have this preamp design in my system. It is dead quiet, very dynamic and very musical. It's also driving two tube amps (input Z 100k and 500k) and one SS subwoofer amp (input Z 50k) with no problems. This preamp was written up in AudioXpress if you have access to past issues.