I've found only one post on the whole of Talkbass that even mentions the M34. M34 pickups are Barts replacement of EMG 35 sized housing. I believe they have EMG 40 and 45 sized ones as well. Does anybody out there use these pickups? Bartolini offers these models: M34C - bright, smooth humbucker strong lows and low mids M34K - brighter humbucker - treble enhanced version of the M34C M34X - brightest, but not harsh, humbucker - more treble and bass than the BB4K M34E - bright, smooth triple coil design M34EX - brightest, treble enhanced version of the M34E If anybody uses any of these or has any comments on them, please post it here. Sound clips would help a lot. Thank You. -Eric.