Like ANY cartridge, there is no "optimal" loading that applies in every situation. This is a matter of "tuning" the cartridge to the particular system and listener's taste. Even with no other changes in a system, I have found that changing the phono stage means changing other aspects of setup, particularly the loading of a cartridge. Different stages require different loading and some stages demand attention to loading while others are, relatively speaking, insensitive to loading change.
I've heard the Orpheus in a friend's system that affords only limited opportunities to change loading (e.g., 47k, 1,000, 100). The Orpheus sounded best in this system at 100. In my rig, there is really no easy way to change loading, so the best I can say is that it sounded better at 460 ohms than 1,000 ohms. I really was NOT tempted to go with more loading (lower value resistor, like 100 ohms) because at 460 ohms, the Orpheus was substantially more shut down on top than my Titan.
By the way, I like the sound of the Orpheus a lot. It may be more upper midrange prominent than the Temper W (whose to say which is more "neutral"), but it sounded more dynamically alive than the W (a big plus).
I've heard the Orpheus in a friend's system that affords only limited opportunities to change loading (e.g., 47k, 1,000, 100). The Orpheus sounded best in this system at 100. In my rig, there is really no easy way to change loading, so the best I can say is that it sounded better at 460 ohms than 1,000 ohms. I really was NOT tempted to go with more loading (lower value resistor, like 100 ohms) because at 460 ohms, the Orpheus was substantially more shut down on top than my Titan.
By the way, I like the sound of the Orpheus a lot. It may be more upper midrange prominent than the Temper W (whose to say which is more "neutral"), but it sounded more dynamically alive than the W (a big plus).