I would think that a threshold must be reached to energize the voice-coil.This will be different for the technology employed.Dynamic,electrostatic/planar or expending spherical et al.
CES update 2009
Tomorrow, I will begin to share information about CES 2009. I just got back late tonight and will try and post a few pics and give a few highlights of the show. There were a lot of good systems and a lot of fun. Initial highlights were of course the MBL system, the Boulder Wilson system, my overall favorite for a few reasons I will detail later, and the Avantgarde System which was a surprise for me as I am not a horn fan as a general rule. The Boulder Wilson combination made me feel I could live without tubes...a big thing. It was really that good.....more later....