Points or, better, cones are the only things you can use under speakers without sacrificing some bass response, although Totem and perhaps others use steel balls. ( I've heard Totems so equipped and they didn't seem bass-shy, but who knows what difference spikes would have made. )
You want to create an impedance mismatch with the support surface ( that's the reason for choosing a cone shape ) and also couple the speaker firmly to it ( hence the point, which digs in and won't move ). The impedance mismatch keeps vibration out of your desk; the firm anchor provided by the point stops the driver cone's motion from being wasted on pushing its enclosure in the opposite direction.
However it is just possible you don't want to make holes in your desktop with points. In that case you might look into a cone or spike equipped with a cup or base to receive it. Of course with this you have sacrificed some anchoring to the desk and you will need to make sure the cup sticks fast.
Here's a Web page from UHF magazine which describes Superspikes and Tenderfeet, both possibilities for your application.
Spikes etc. at UHF
You want to create an impedance mismatch with the support surface ( that's the reason for choosing a cone shape ) and also couple the speaker firmly to it ( hence the point, which digs in and won't move ). The impedance mismatch keeps vibration out of your desk; the firm anchor provided by the point stops the driver cone's motion from being wasted on pushing its enclosure in the opposite direction.
However it is just possible you don't want to make holes in your desktop with points. In that case you might look into a cone or spike equipped with a cup or base to receive it. Of course with this you have sacrificed some anchoring to the desk and you will need to make sure the cup sticks fast.
Here's a Web page from UHF magazine which describes Superspikes and Tenderfeet, both possibilities for your application.
Spikes etc. at UHF