Recommandation for 1:6 1:8 SUT under $5K?


I’m looking for some advice on a step-up transformer that pairs well with my Audio Research LS28SE, PH9, and Hana Umami Blue cartridge. I currently have both the Denon AU-S1 and AU-340. The AU-S1 sounds absolutely beautiful—very transparent and open—but at 1:13 the gain is too high, and I’m getting some clipping, especially on dynamic peaks. Even with the AU-340 at 1:10, I can still hear a bit of overload. I’ve tried playing with loading and parallel resistors, but the issue really comes down to gain. I think something in the 1:6 to 1:8 range would be perfect, enough to keep the clarity and tone I’m getting from the AU-S1 but with better headroom. My budget is around $5k, and I’m open to any recommendations for a high-quality SUT?

arazmj

Many of the Japanese SUTs (Luxman / AN:Kondo) use severe loading on the transformer to reflect back a small multiple of the internal impedance.  This is typically applied to the SUT secondary and could explain this situation.   

I think the key point here is much of the mystery and speculation around SUTs in general stems from the limited published data by the manufacturer.

The assumption of a 47kΩ terminating resistor falls out of the picture if there is a 5KΩ resistor internally soldered across the transformer secondary.  This also mucks with all of the other assumptions/calculations.

dave

Dunno if this would be a good fit. I have one and quality and sound is excellent using my Declare tube amp/pre-amp. Support from UK is also excellent.

 

https://www.zinamp.co.uk/products/Headmeister.html

 

@elliottbnewcombjr  No I don't have a preference for wiring. Anything that sounds good. But I beleive in passive components as the first stage of MC cartidge amplification. 

Dave, do your own experiments suggest that adding a resistor on the secondary sound s better vs loading the primary? Obviously it could be done either way, and the end user can’t easily determine the actual turns ratio without knowing the value of the resistor and where it is placed. Otherwise it’s an equation with two unknowns.