grado hum


so I just added a grado gold to my music hall 2.1. On my headphones ( through the belari preamp) it sounded great, but then I was rocking out loud style on my monitors and I heard it...the hum I thought I had lost when I upgraded to the 2.1. Anyway the hum is really only present at loud levels, but I was wondering what you folks thought: what can I do to get rid of this? Should I get a new cartridge? If so, which one?
roggae
thanks folks. If anyone has that article I'd love to read it. Anyone have any suggestions for other cartridges that would sound good with the music hall? Loving the grado soundstage, but not he hum...
I don't know your budget, but I'd consider the new ZuAudio modified Denon D-103 for $399. Just make sure you phonostage has enough gain for a moving coil cartridge.
This is one disadvantage of a 'table with an inboard motor. I recall that Grado carts are particularly prone to hum via motor interaction - a problem noted by some users of the Oracle 'tables. If this is the problem (it could also be related to grounding issues as thsalmon notes) then a new cart might help, but a table with an outboard motor will put an end to the issue for good.

Marty
anyone have any outboard motor tables to sell/recommend?

budget guy/student

thanks so much folks!!
Roggae, for information on shielding your motor, Google "mu metal" for information and suppliers. Here is one example -

http://www.mumetal.com/

Modifying your table should be much less expensive than buying a different cartridge, AND you will preserve the characteristics of the Grado you enjoy.