Optimal Loading for Shelter 501 mk2

For what it's worth, I use a Shelter 501 Mk2 into a Plinius M14 phono stage which has adjustable loading "on the fly" with a knob on the front. You can select, 47K, 1K, 470, 100, 47 or 22. To my ear 47K is the best with the sound becoming consistently more compressed as I decrease from there. Shelter also recommends 47K ohms for a high gain phonostage.

Jyprez, can you kindly provide the information or link to where Shleter recommends 47K for the Shleter 501? Thanks

It's on the data sheet they provided with the cartridge.
It says,
Recommended load impedance:
step-up trans within 20 ohms
head amplifier within 100 ohm
high gain EQ-amplifier within 47k ohm

I am using a high gain amplifier whereas Doug uses the Bent transformers

I see, thanks. Must be an updated sheet, as mine does not include that third ("EQ") line.

I finally got around to playing around with a lower loading, per our discussions above.

To recap:

I have a Teres 255 with a Shelter 501 Mk II into a K&K phono stage that includes a 20db (1:10) Lundahl step-up. I have been running happily with 100 ohms loading (using 10k Caddock resistors per the K&K loading kit).

Doug's using 38 ohms with his Bent transormers got some of us wondering if a lower loading would be better. I split the difference and went to 75 ohms (7.5k Caddocks).

That experiment didn't work out well, as I lost the bass. So 100 ohms seems like the right balance between bass and highs: I am sticking with it.