Steve -- I forgot to mention that I've been using the LPB35, along with the 468 and they both sound great. Angel grumbled a bit when I had him set the bias for them on my two Studers...he said that 457 was better, at least on Studer's. Contextual, if there's any difference to me the 468 seems a bit more open and less smeared, while the 456 sounds a bit warmer to me....Hopkins