The BBSM-10VNF is a floor standing version of the classic BBSM-10 monitor. The 3-way system uses dual 10" woofers, a 6 1/2" cone midrange and 1 1/4" soft dome tweeter in a ported enclosure. The frequency response it rated 40-18K which is surprisingly honest for a $16,000+ speaker. For that alone, Westlake Audio has piqued our interest. Now if someone could just tell us what all the foam is about...
Discuss "Westlake Audio BBSM-10VNF" here. Read the article.
We talked about the foam over at the Lansing Heritage forum and some of us thought it was for dispersion control, some foams can act as a lens.
Back in the 70s and 80s EV used a foam lens that covered a large dome tweeter (Superdome) leaving a small hole in the center, it looked like a foam bagel. The lower frequencies from the dome passed through the foam but they higher frequencies came only through the small hole thus making for wider dispersion than a dome that size would normally have. This device allowed EV to use a larger than normal dome (and thus get higher output and a lower crossover than most domes) and still have wide dispersion.
The working of the lens is explained in this sheet from the EV archives.
Last edited by irishtom; 01-07-2009 at 11:20 AM.