Hi There,
I am a hobbyist and have an interesting question regarding how to dampen the mechanical energy being transmitted by a speaker's cone/voice coil motor assembly to the mounting surface of a bookshelf speaker I am designing using old parts. Dampening/thickening the mounting surface has gone as far as possible, but what I would like to do now is add more mass to the raw speaker basket/magnet housing itself. You see, the speaker uses a very small neodymium magnet and motor assembly but which nonetheless is powerful enough make the raw speaker hop around on the bench. It is a 5-1/4" driver (Boston Acoustics Pro Series 50se), with a relatively tiny shielded magnet assembly and heavy polypropylene cone, and what I would like to do is add about 1-2 pounds of weight to the back of the magnet housing. Attaching the weight is not a problem, and the basket is extremely rigid cast aluminum, thus making deformation unlikely. It is my belief (!) that the additional weight, when coupled to the basket/magnet housing and thus coupled to the mounting surface by proxy, will increase the inertia and resistance both front and aft of the cone and motor assembly, thereby reducing resonances in and through the mounting surface.
Thoughts, comments, criticisms?