Dynavector XV-1s loading question.

As you approach 30 ohms from higher values, you may notice at some point that you have less apparent phono stage gain, due to loss of signal from hot to ground. If that is happening, then go up at least one notch from the value that affected gain. This will give you a near approximation of "critical damping". Or just use 100 ohms, which is pretty standard for cartridges with an internal resistance of <10 ohms.

Thom, Allen Wright (a noted preamp designer) is very outspoken on this subject, over on the TubeDIY forum. He has insisted for a long time that LOMC cartridges sound best with a 47K ohm load. I've got an MP1, too, albeit a highly modified one. For me, 47K is a bit too bright with my Ortofon MC7500 or Koetsu Urushi. My guess is that one's preference will depend upon one's listening bias and the amplifiers and speakers downstream from the phono stage.