Anyone have experience with the PH-1000 and tube stage

Small points:  (1) Nearly all phono and linestages ever made are "Pure Class A" topology.  That is a bragging point often touted by manufacturers as if it is novel. (2) The Steelhead uses autoformers, not transformers or "SUTs", and I am not sure they use autoformers for voltage gain.  I say this because the owners manual and other sources as well say that you can dial up 65db of gain even when the unit is set in MM mode. Come to think of it, I once called Manley, and they confirmed this fact. Separate information says that the autoformers are out of the signal path in MM mode.  Putting those two facts together suggests the autoformers are doing something else.  Furthermore, inside there are sets of discrete load resistors in values equal to the load resistance options that you can select on the front panel. This suggests again that they are not using autoformers in the way we think about SUTs, because if that were the case, then the autoformers would play a role in determining the load seen by the cartridge. Maybe Intact Audio knows.

Right on the class A.  Not unique,  

But - the Steelhead’s front end is unusual enough that it really does justify “reference” status: the autoformers aren’t used as SUTs but as impedance-conditioning elements, allowing the cartridge to see a perfectly damped, non–reflected-load interface, while the fully Class-A triode gain stages provide the actual amplification. This hybrid magnetic–active topology avoids the bandwidth, phase, and loading artifacts of traditional SUTs and avoids the higher noise and overload margins of all-active MC stages. Very few phono stages—Boulder’s fully differential solid-state architecture, VTL’s transformer-coupled high-voltage triode gain, or ARC’s FET–tube hybrids—use anything comparable. The Steelhead’s combination of extremely low noise, massive headroom, wide bandwidth, precise loading control, and the ability to run the triode gain stages at optimal operating points without transformer constraints gives it a uniquely dynamic, transparent, and tonally natural presentation. This is why it consistently ranks with the top reference units: it blends the quietness and drive of transformer-based designs with the speed, openness, and linearity of high-gain tubes in a way almost no other phono stage attempts.

You got me started on researching Steelhead - and this is where I ended up.

@ulcerdoc did you ever have a chance to hear the PH-1000?

No I haven’t.  Read and watched reviews.

Ulcer, baby.  Did you write that paragraph about the autoformers in the Steelhead, or are you quoting a paragraph you found somewhere?  Again with the "fully class A triode gain stage" business.

"This hybrid magnetic–active topology avoids the bandwidth, phase, and loading artifacts of traditional SUTs and avoids the higher noise and overload margins of all-active MC stages."  I don't quite get the last part, because the high gain IS coming from an active stage, and I wondering what good can an autoformer do in that case. On the other hand, Manley knows better than I. I would still love to see a schematic.