SUT With a Manley Steelhead RC?

in my opinion, this is an idea, for sure, but not what you would call a good idea. If you just want to know what a step up transformer can do for you, sure, go ahead and try it. But if you expect a SUT to change the sonic character of the steelhead in some particular way, perhaps it would help if you would say what it is you want to change. As someone else noted, the steelhead on its MC inputs already uses autoformers, but from what I can tell, and Manleyare fairly mysterious about this, the autoformers are not used purely for gain, as in the case of using a SUT. I say this because you can dial gain up to 65 db using the MM inputs which bypasses the autoformers entirely. And that is what you would have to do with an external SUT. Connect it to the MM inputs, and set gain to the minimum of 50 db. it doesn’t make any sense to me, but if you want to do it, you will not be hurting anything except your pocketbook. If you want to tweak the Steelhead, upgrade the output coupling capacitors, which are mediocre at best. And way higher in value than necessary. My next thought, not yet done, is to upgrade the attenuator. ( I use mine as a full function preamp.)

I had a Steelhead before they offered remote control but after the first batch. I rolled the tubes on the audio path, using NOS Tele, Siemens and old Raytheons for the 7044. I could never get it to gel in my system, especially using the MC autoformers. I ran it wide open, at that time using a Lyra Titan I (which I think was their best then) and the original Airtight PC-1 (later upgrade to a Supreme). I added a line stage- Lamm L2 Reference, then a Veloce (which is up to date as of this writing) and eventually migrated to an entirely different room, with a number of small changes. I also changed phono stages.

One of the things I found in listening was a slight electronic glaze from the Steelhead which was a constraint to more natural, flowing analog sound. I think every person has their own biases, and their choices-assuming no price constraint- are limited by what they have heard.

The Steelhead in my estimation sounded better with a line stage than using its passive volume control. Thing is really well built, quite flexible, and Eva is a saint. 

In relation to the MSL SUT, there is a particular Tonal Quality Japanese Audio Enthusiasts seemingly lean towards, which is for the Rich Tone.

The MSL SUT may? be voiced to create the perception of rich tone is increased to compensate for the Cart' user that desires for more of  Rich Tone than the Cart' is able to produce in a typical MC Input.

I like @mulveling  have quite a few SUT experiences behind us, and even though we lean towards different sides of the Rich/Lean Scale, we both know SUT's can be perceived as unbearably overblown in the Lower Frequencies, to being perceived as Lean in the Upper Frequencies.

What really matters is where the individual chooses to hit the stop button and get of the Bus on the Rich/Lean Route.

I happen to have a Bob's Devices 10x SUT sitting here gathering dust.  I am not inclined to sell it, but I would be happy to let you borrow it to try.  You would still need to buy another set of phono cables and they should be a match to the ones you already use.  Send me a note if you want me to send the SUT to you.

Whart, what’s a Veloce? I own a 59 Alfa Romeo Giulietta Spider Veloce, but it only plays music on an open country road with top down. Later today I’ll dig up my recipe for upgrading the Steelhead and post it here. Also, I own v2.0 with remote. I think it’s a bit different from the original that you owned.