Voice Coil

Voice Coil March 2018

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IN THIS ISSUE V O L U M E 3 1 , I S S U E 5 M A R C H 2 0 1 8 1 INDUSTRY NEWS & DEVELOPMENTS By Vance Dickason 8 SPOTLIGHT AISE 2018 Exhibit Coverage By Mike Klasco, Nora Wong, and Touy Ken 12 TECHNICAL NOTES The Efficiency Bandwidth Product for Loudspeaker Drivers By Christopher J. Struck t 14 ACOUSTIC PATENTS By James Croft 18 TEST BENCH Precision Devices' New PD.CD1N Plus Peerless by Tymphany's DFM-2544R00-08 By Vance Dickason 28 INDUSTRY WATCH By Vance Dickason By Vance Dickason Audio Expo North America (AXPONA) Calling all audiophiles, music lovers, vinyl collectors, audio engineers, and musicians, Audio Expo North America (AXPONA) will take place April 13-15, 2018, at the Renaissance Schaumburg Hotel & Convention Center in Schaumburg, IL. This year AXPONA will offer attendees three jam-packed days of incredible sounds, technology, presentations, design, and the latest products in the industry. Now in its ninth year, AXPONA is the defining high-end audio show in the United States—catering to dealers, distributors, and manufacturers, as well as music-loving consumers. AXPONA's new state-of-the-art venue will feature an expanded Exhibit Hall, new Record Shop, and Master Class Theater. AXPONA will once again offer something for everyone—from the novice music lovers to seasoned audio experts who want to enhance their sound with the latest technology. The 2018 event will be the largest show to-date, meeting the increasing demand from attendees looking for the top brands in the music world under one roof, in a central location. The expanded Exhibit Hall, which is home to the Marketplace and Ear Gear Expo, is 30,000 ft 2 and will showcase a vast array of turntables, cables, accessories, racks and stands, tone arms, cartridges, and the latest headphones and associated equipment in the growing world of mobile and high-end personal listening. Some of the top manufacturers expected to exhibit this year include: AudioQuest, Empire Ears, Kimber Kable, Morrow Audio, Pro-Ject, Sennheiser, and SOTA. The Record Shop, a pavilion within the Exhibit Hall is the place to shop for new and vintage vinyl, CDs, SACDs, and downloads and to discover new artists. The new Master Class Theater will feature curated content presented by industry experts. Industry News & Developments

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