Phono preamp or SUT for low output moving coil

@dcaudio

Look into this hidden jewel from Japan. Direct ship to you for under $800. Dedicated gain for Low and High MC carts.

http://softone.a.la9.jp/english/Model4/m4-1.htm

@herman

I really appreciate your contributions here. They provide good information on SUT’s designs and careful selection of SUT’s for anyone looking to pursue this route. 

I believe you’re right, the EMIA’s design with a higher input impedance makes it particularly well-suited for low-output moving coil (LOMC) cartridges that benefit from higher loading impedance. The standard 47kΩ load, a legacy from the moving magnet (MM) era, often results in suboptimal performance for MC cartridges, which typically need more tailored loading for the best sonic results.

If I interpret correctly what you said, using a step-up transformer (SUT) with a high-impedance load like 300kΩ opens up much more flexibility. The higher impedance allows for better cartridge damping and less tonal constriction, especially with LOMCs that thrive in the 500–1,000Ω range. The example of a 1:20 ratio yielding 750Ω into 300kΩ is a great illustration of how dramatically this can improve compatibility compared to the more restrictive 118Ω with the standard 47kΩ.

Loading the primary to fine-tune impedance is another clever technique, and Dave Slagle’s calculator is an excellent resource for those looking to experiment.

Before this turns into another one of those senseless debate….the answer ultimately depends on what “accuracy” means to an individual and how it aligns with their listening priorities.