Voice Coil March 2025 - PDF

VOLUME 38, ISSUE 4  —  February 2025IN THIS ISSUE 1 FOCUS Developments in Technologies and Materials for Consumer Audio Products By Mike Klasco 12 SPOTLIGHT Enhancing Loudspeaker Efficiency and Bl(x) Symmetry with Virtual Voice Coil Part 2—The Rest of the Story By Dario Cinanni 17 DIRECTORY 2025 Speaker Enclosure Vendors By Nora Wong TEST BENCH 20 Dayton Audio’s Ultimax II 8-22 8” Subwoofer By Vance Dickason 25 GAIT's New Glass Diaphragm 1” Dome Tweeter By Vance Dickason 29 INDUSTRY WATCH By Vance Dickason  (A link for downloading the magazine issue PDF is sent immediately following payment. Please be sure to use a valid email address.) • • • Voice Coil, the periodical for the loudspeaker industry is free for those who qualify (audio or loudspeaker industry professionals). Or you can also simply purchase a subscription for the print or digital edition (digital is recommended outside the US). Click here for subscription services.A small sample of James Croft's Patent Reviews can be foun