For my own XPP he recommends an optimum load of 200 Ohms.
I prefer to let it wide open at 47K for both of my phonostages.
I'm using :
1). A current mode active pre-pre with Siemens CCa feeding a RIAA with RCA 12SL7 / RCA 12SN7 / Philco XXB
The TT is : Symphonic Line RG6 with Pluto 9A Prestige.
2). The EAR MC4 step-up feeding a half active / half passive RIAA with Telefunken ECC803S
The TT is : Thorens TD124 II with SAEC WE-308 SX & Zonotone Z-SHELL 10 headshell.
Speakers are : Lowther P6M Ticonal in Carfrae LBH plus an added Seas T35 Exotic Soft Dome tweeter (crossing at 2.6Khz)
Amplifiers are : Berning Siegfried (for T35), 12SL7/6J5/4300B (for P6M)
As an attempt to open up more the midrange, I'm going to substitute the 300B SET for the Futterman H3aa in order to free the P6M from the Output Transformer.
So, you can realise that for my own taste, a havier load for my XPP is out of the question as there is not needed any damping. (Even on my SAEC!)
The cables are all the new VDH 3T series (Cliff, Mountain, Cloud, Air).