Mark Levinson No 52 Preamp phono stage custom loading

You are MUCH better off using the ML option, because every resistor type has it’s own sonic signature. I have tested extensively in my own phono stage, and the results range from sublime to unlistenable. The worst was the most expensive resistor and the 2nd best was the cheapest.

The clear winner, to my ears and with my system (ESLs, custom SS class A electronics, air bearings, Koetsu) was nude Vishay. Costs less than $50 the pair, and it makes the biggest difference in the system, at least as much as your ML phono section. Does ML still use aerospace MAT series transistors from Analog Devices for small signals? I use complementary MAT’s and nude Vishays wherever I can from phono to power amps.

I use a loading of 500 ohms for the Koetsu for most material, but more if it’s organ and less if the cartridge is cold. Why not get a few pairs, say 100, 500, 2K5, 10K and test? It’s the best use of money you can make - but beware, the nudes are FRAGILE.

Do let us know what works for you and that lovely new Hyperion.

All of this IMO. YMMV.

Should have added, that's 500R with no SUT, just straight in.

@terry9 If you are referring to the No52, could you tell me how/where the custom resistive loading is done? Are there screw terminals somewhere like the 32? Thanks.

Sorry Dnicol. I was referring to my own electronics, DIY. I built in 20 cartridge loadings from 5R0 to 86K. That feature cost me $1000 in parts, but was well worth it.

@terry9 Curious, what were the most expensive and the cheapest?

I do have some 2575’s on the way, so far found dirt cheap chinese metal film 10 for 75 cents to sound better then a dale cmf55 or pink takman!

The worst was the most expensive resistor and the 2nd best was the cheapest.