Like Doug, my 515 was a bit sharp thru my NAD integrated, so I tried it thru a Creek passive pre to my Moscode 300 hybrid tube amp - much much better. Now I'm saving my pennies for the Marsh P2000t pre and A400 amp, but I doubt I'll part with the NAD just yet (though long term I'm considering the CAL 10 or 20).
chas
chas