Change the cartridge or phono stage

Just try the Herbies mat before spending more money and taking your tonearm apart. The sound may well be improved to your satisfaction.

I assume you mean the Music Hall turntable? Try a Herbies mat. You're probably thinking that a mat can't make that much of a difference, but on that table it does. Much more warmth and bottom end, IMO. Herbies gives a 30-day money back, so there's minimum risk involved. Maybe a few bucks shipping at most.