Dynavector XX-2 low output - what impedance?

If you are using the Dynavector XX-2 low output cartridge, what loading are you using? This would be straight into a Pass phono stage, so transformer load is probably not germane in this application. Thanks for any guidance in this one.
I've had excellent results loading the XX2 over a fairly broad range spanning anywhere from 100 ohms on up to around 400 ohms,the ideal setting being dependant on taste and system context.
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