Dynavector XV1-S and step-up

Hatari, sorry but I don't really have any experience implementing external SUTs in my own audio systems. The guys who posted above are probably in a better position to comment on the technical aspects and compatibility of those specific SUTs you are exploring.

Hatari, By all means, if your Shindo already has a built-in MC section utilizing an internal SUT, you should go ahead and use it. The SUT was obviously selected and designed into the circuit for the most seamless possible match. It is unlikely that you can do any better, or even as well, with an external SUT connected thru your MM input. Don't make this stuff harder and more expensive than it already needs to be. Sheesh.

Hi Cincy_bob, here we go again...
It seems the perpetual misunderstanding when looking into SUTs, that the 'normal' recommended (experienced) best cart loading into a MC phono-pre (non-SUT) is incorrectly considered with SUTs i.e. 100 -150ohm as you suggest.
This is completely off the wall when using an SUT.

If you care to look-up e.g. Lyra's spec. sheets you will see what I mean. Their recommended values for SUT is about 1/10!
My experience, hands-on, tells me 6ohm x 2.5 = ~ 15ohm! is a good point to start and as I said, about a 1/10 of what you are suggesting.

Also, what Restock mentioned is much more where it's at, also when it comes to impedance matching.

Lewm, what you overlook is the voltage drop going through any SUT. It is not just 0.3 x factor 10 = 3mV and most certainly not when you decide to do some resistive loading to go from 470ohm to say ~ 15ohm.

I think the 1:20 suggestion of Restock looks like it, and then it be better to consider primary loading not to hog the secondary side with too big a resistor i.e. > 22k

My 2cents worth. There are some sites that explain the maths and I'm not going to do it again.

Greetings,

Lewm: yes, original post talked about the MC a little, so thought I'd framed it properly - looking to optimize, not reinvent. Question is whether it's optimized for the Dynavector, hence the discussion and desire to see whether an SUT into the MM (this pre has both) might be interesting. Thanks for your input. I have a few paths to explore based on this post and some constructive private thoughts.

Axel, I accept what you are saying about the differences in optimal input impedance when using an SUT as good technical background. I gather the manufacturer's specified 30 Ohm minimum loading is intended to apply to a normal MC gain stage and not an SUT and that optimal SUT loading may well be a value substantially lower than 30 Ohms.

There's no need to act so exasperated or put upon in communicating your technical advice. If it's that much bother, perhaps you should just return to listening to music and let the rest of us wallow in our ill-informed state.