Effective ways to upgrade a Music Hall MMF 2.2


I am researching ways to upgrade a Music Hall MMF 2.2 and would like to get some advice.

1. Change the platter to an acrylic one.
2. Add a Soundbox - this is intended to be for automating changing the speed from 33 to 45 with a click - why are folks indicating this would improve sound quality? Confused about that aspect.
3. Changing the cartridge - how high can I go for this type of turntable and arm? Will get a different counter weight if required.
4. Should I consider changing the arm? When do these things become ineffective? I.e., what role does the table itself play in the quality of the sound?
5. I would like to upgrade my phono stage from the NAD PP2 that I have. Would a Project Tube Box make a difference?

Thoughts welcome.
shugho
When I had my Music Hall MMF5, a Herbies Mat made a huge difference, giving the table a much fuller sound. But the same mat was a downgrade on my Linn. Money back if not satisfied, so it's a very low-risk proposition. Honestly, I would not put much more money into a 2.2. Listen to it, enjoy it and develop a point of sonic reference, so when you listen to something else you'll know if you like it more or not.

These things take time and listening. Good luck.
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The most effective way to upgrade most tables, including ones in the price range of the 2.2, is to upgrade the cartridge. Take a look at your table in the Needle Doctor website and yu will find some upgrade recommendations. I recently upgraded my Pro-Ject table with a new and better cartridge and switched to an acrylic platter at the same time. Much better. Best of luck.