Why do MM cartridges amplify more surface noise??

Hi mate
Taking account of all the previous posts can I just add that all things being equal, it may well be that it is due to MM's having higher compliance meaning that they react to noise more. View it as u would suspension, and that softer suspension on a car reacts more to bumps in the road.
In my experience I find that there is little difference in noise from either MM or MC. You could be having set up issue. There is a bit of a one size fits all approach to arm cartridge arm compliance matching - whereas if you use a Moerch DP6 you can get proper compliance matching

Thanks to all who responded to the thread.

To Stringreen. Rega P3-24 table has two front rubber feet that stand inch high, and one rear middle leg. I placed the feet on 3X3 inch rubber squares that have a dense cork center sandwiched between two serrated black hard rubber material. I doubt that is negatively reacting with the Ortofon Blue. I had the table on the same blocks when I used the AT120 cartridge. Nevertheless, I will try your suggestions less the sauce cans

I concur with Stringreen's entire post, including on rubber footers of any kind. At a minimum, bypass them for the support structure of the TT. If feasible, remove them altogether.

Rubber absorbs vibrations and releases them after a time delay. While this process reduces each vibration's frequency and amplitude, the result is always sonic mud.

Of course Stringreen's tongue was in his cheek (along with the sauce, no doubt) but sauce cans would probably act as an echo chamber and do something similar, especially if they were empty. Still, their rigidity would be sonically better than rubber and you could experiment with different flavors. ;-)

Solid blocks of a dense metal would be better. Solid blocks of very dense hardwood would be better still. Best of all are well designed and engineered footers that reduce the frequency of incoming vibrations to below the audible range (e.g., Stillpoints). This lowers a TT's sound floor without introducing sonic mud. They sometimes soften transients and micro-dynamics so it becomes a trade-off, but rubber introduces sonic negatives that can be avoided altogether.

I also had a VTA adjusting sleeve and a suspended c/w on my old Origin Live Silver (Rega clone tonearm). They both made a nice improvement, but eliminating rubber anywhere on a vinyl rig will make a much bigger one.

Doug, I use small cans of Mandarin Orange slices in water, Del Monte brand only. The secret is to place a tiptoe between the bottom of the can and the shelf. Two of my turntables that are mounted in slate plinths are supported in this fashion. I'm just sayin'. In fairness to Stringreen's tongue, have not tried tomato sauce.