I recently sold the Rega osiris integrated amplifier, and the Luxman L-509X integrated amplifier, the new krell k300I integrated amplifier seem' s to have everything better than the previous amplifiers, 350hrs and still breaking in, the clarity this amplifier has is just uncanny to say the least, non fatigueing!, unlike the Luxman, the osiris was good, but lacks the treble detail, and articulated bass as the Krell, or clarity, this is the order of my findings after living with these unit's, krell k300I, Rega osiris, Luxman L-509X, all have used same everything, digital, cable's , furutech gtx-Rhodium duplex receptacle's, dedicated line's, etc..., cheers.