Quote Originally Posted by colinB View Post
Sorry if im wandering of the post but doing my sums for my new jelco 250 st (still to be fitted) at 18 gm and my ortofon 2m at 7.2 gm, thats a resonance of 7hz. That seems very low but thats good right
7Hz is a bit low but not too low. Ideally the arm-cartridge resonant frequency ought to be in the range 8 - 12Hz.

However as with most things in audio, use your ears. If your records are not too badly warped, then you shouldn't have any problems.

Regards