Therefore EMT offers the TSD-G and the J-shell. The TSD-G is the same shell which is used for all the T-series pick-up's. The EMT pick-up's have a very short length and need not much space. Pick-up's (in the shell) and tone arms form a virtual geometrical unit.Not so the J-shell. Designed primarily to use the J-series pick-up's with the EMT tone arms, it offers the possibility to mount pick-up's with 1/2" mounting variable by means of slot holes.