Rubber feet are pre-installed on all BasX subs. In the case of the S10 and S12, they are self-adhesive feet, so they cannot be removed. The taller feet used on the down-firing S8 sub can be removed since they are screwed in. However, I consider upgraded subwoofer feet to be of dubious value. If you need to provide vibration isolation, Auralex sells a product called the SubDude that is a vibration decoupling platform.