The benefits - They would raise your speakers a few inches off the floor.
The drawbacks - they would raise your speakers a few inches off the floor.
The use of Maple, if anything, might only change the resonant frequency of vibrations passing from/too your speakers and floor. The advertising connection between the benefits of maple (used for a lot of instruments so it must be special! Yes it is FOR music instruments!) is I think grossly overstated.
If they are connected to the floor with spikes and your speakers were connected with spikes there won't be much if any difference because of the different woods connected to them, that is your speakers with spikes, or the maple/spikes put under your speakers.
In your deliberations the issues consider whether you are using decoupling materiels such as hocky pucks (whatever - softer rubber like materiels to damp floor vibrations) or coupling materiels like metal spikes which allow floor vibrations to pass to the speakers and speaker vibrations to pass to the floor.
In either event, IMHO, putting a different type of wood between the floor and speakers. with or without cones, accomplishes nothing meaningful unless you have identified a particular resonant frequency which can be damped by inserting a different type of wood into the mix.
The drawbacks - they would raise your speakers a few inches off the floor.
The use of Maple, if anything, might only change the resonant frequency of vibrations passing from/too your speakers and floor. The advertising connection between the benefits of maple (used for a lot of instruments so it must be special! Yes it is FOR music instruments!) is I think grossly overstated.
If they are connected to the floor with spikes and your speakers were connected with spikes there won't be much if any difference because of the different woods connected to them, that is your speakers with spikes, or the maple/spikes put under your speakers.
In your deliberations the issues consider whether you are using decoupling materiels such as hocky pucks (whatever - softer rubber like materiels to damp floor vibrations) or coupling materiels like metal spikes which allow floor vibrations to pass to the speakers and speaker vibrations to pass to the floor.
In either event, IMHO, putting a different type of wood between the floor and speakers. with or without cones, accomplishes nothing meaningful unless you have identified a particular resonant frequency which can be damped by inserting a different type of wood into the mix.