I use footers for my new YG Carmel 2's which have no bass port - in my case I use Arya Revopds. The difference they make to the sound of my system is like a significant component upgrade - wider and deeper soundstage with improved seperation of instrument. Arthur - the main man - is also a great guy and really helpful in tailoring the footers to your specification - size of bolts etc. UK stockists are Audio Emotion but they ship worldwide.