I another thread I described how playing a TT through a MF phono stage running through a phono to toslink converter into the dialog of a pair of Phantoms caused the sound to alternate between playing fine and distorting. It was suggested the gain may be too high. Are their phono stages that allow gain adjustment 'on the fly' or is there another method of achieving the same end? I am currently using a MM cartridge but am likely to also use an MC in the future.