I use a Ortofon Jubilee at .35 through a Loesch phono pre (70db gain?) with stepped attenuators, cartridge/fet-tube-tube-tube-volume/amp/speakers. It drives my Berning EA-230 and Quad ESL's (84-86db effecient?) just fine (medium to small room) and very transparent and dynamic. I rarely go past 1 o'clock for volume. IMHO you should pay close attention to the output impedance of the pre and input impedance of the amp.
Carl