New Speaker, Headphone, and Earphone Perspectives with Voice Coil January 2022

We're off to a great start in 2022. Starting with details about the promise of Iron Nitride (FeN) magnets, followed by an article about Liquid Injection Molding Silicon for Next-Generation Headphone Surrounds. Next up, James Croft reviews a surround speaker patent granted to Klipsch, and Vance Dickason characterizes the Satori MW13TX-4 TPCD-cone woofer from SB Acoustics and the high-power WF275BD01 10.75" woofer from Wavecor. All articles now available to read online, PDF and print.

DB Enterprises announced availability of four new off-the-shelf headphone drivers from VM Sound using liquid silicone rubber (LSR) surround technology. Available in 7mm, 9.2mm, 13.4mm, and 40mm sizes, these drivers are available with different diaphragm materials, including Nomex, aluminum and magnesium alloy. VM Sound's Liquid Silicone Rubber (LSR) surrounds can be used with paper, metal or composite drivers, enabling a very high precision, high performance, and high yield method of constructing headphone drivers and microspeakers.

Loudspeaker engineers have few choices for professional forums. The Audio Engineering Society (AES) is an outstanding international organization although not entirely focused on speakers. ALTI (formerly ALMA) is loudspeaker-centric but does not have a strong base in China. And although you may not have heard about iSEAT, for most Chinese speaker engineers that is their preferred professional organization. The International Symposium on Electro-Acoustic Technologies (ISEAT), founded in 2007, is held every two years and has successfully conducted six sessions.