In my experience, a very low resistive load, which puts a correspondingly heavy load on the cartridge, acts like a tone control, which is to say that as you approach the internal resistance of the cartridge itself, the treble is rolled off progressively and eventually some gain is lost to ground. In theory, if the internal R of the Cadenza is 5 ohms, the minimum load resistance would be around 47 ohms, or 10X that of the cartridge, as someone else already suggested above. But I have lately found that even LOMC cartridges sound their best when the cartridge is essentially un-loaded, at 47K ohms. The treble is more "open" and airy. Dynamics are also improved vs more traditional values of load resistance. (LOMCs with low internal resistance, like the Cadenza, are traditionally loaded with 100 ohms, a set it and forget it value.) Ralph Karsten (Atma-sphere) points out that not all phono stages behave properly when LOMCs are presented with a 47K load, so maybe I am just lucky. I agree with the person who said that the "best" choice is phono stage AND cartridge dependent.