New companies are coming onboard to support and participate in the 13th Annual Mix L.A. Open, sponsored by Guitar Center Professional. Set for Monday, May 12, at the Malibu Country Club, this “Best Ball” tournament has a record number of sponsors that include Absolute Music, Acme Audio, CE Pickup, Design FX, Full Sail University, Harman Pro/JBL Professional, KRK, Lurssen Mastering, Maple Jam Music Group, Mix magazine, the P&E Wing/The Recording Academy, The Pass Studios, Record Plant, Sennheiser, Shure, Sound Design Corporation and Yamaha Corporation of America. A limited number of playing spots and sponsorships are still available. Call Karen Dunn at 925/939-6149 or visit www.mixfoundation.org for information. Mix Foundation events benefit hearing conservation and audio education programs, including House Ear Institute's Sound Partners program and Sound Art.