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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
dover
2,504 posts
 

....

AN-S4/M - 27.5 Ohm input impedance - For cartridges with an impedance of 7 to 9 Ohms

note that 7 x 4 = 28

AN-S4/H - 48 Ohm input impedance - For cartridges with an impedance of 12 to 16 Ohms

note 12 x 4 = 48

so, their input designations are 4x the lowest coil impedance, WTF?????

 

The published input impedance of the various Audio Note SUT's are specified for a 47k input. They state on their website that they believe MC's sound best into a load 3-4 times the internal impedance of the cartridge.

Their stuff sounds awful anyway so does it really matter what their beliefs are ?

sksos1
432 posts
 

MC- Step-Up Load Calculator

By Consoludated Audio

https://www.consolidated-audio.de/en/calculator_view.php

lewm
14,705 posts
 

Dover, do you therefore think that the turns ratio of their 27.5 ohm SUT is likely to be ~1:40?

westcoastaudiophile
819 posts
 

@arazmj I would recommend Phasemation SUTs, one example is here: https://www.phasemation.com/product/t-600.html 

dover
2,504 posts
 

Dover, do you therefore think that the turns ratio of their 27.5 ohm SUT is likely to be ~1:40?

Looks like it based on their published data.

 

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