In fact I use a superom20.la only diffrence with 30 diamond is diffrent.elliptique (Le20) fineline; ortofon patent on 30.c is not a cell dj.en vrit c 'is pure hi-fi, the upper rev up top and full of mdium dtails it can cost the classic no problem! of jazz means trs good bass if I compare with the shure m97xe trs I know well. The Shure has a warmer sound and sweet, the OBO is clearer and a little "nervous" but I really like both! I can not choose is really beautiful sound.