I had the same result with my Reference Platinum on a suspended Thorens TD147 with a TP16III arm of 7,5 eff. weight.
I ruined the stylus and experiment with a Denon DL301 MC cart right now.
Strange thing is: with the Grado the woofer extention didn't affect the sound audible.., with the Denon the woofer is thight and controled but the sub-bass is to much to bear.
Because sound was good I never realy bothered about the woofer extension but now I wonder if a thighter suspension may cure the problem.
Maybe a subsonic filter may do some good.
Good luck..!
I ruined the stylus and experiment with a Denon DL301 MC cart right now.
Strange thing is: with the Grado the woofer extention didn't affect the sound audible.., with the Denon the woofer is thight and controled but the sub-bass is to much to bear.
Because sound was good I never realy bothered about the woofer extension but now I wonder if a thighter suspension may cure the problem.
Maybe a subsonic filter may do some good.
Good luck..!