LSR4300 Firmware and Firmware Installation Flashers Version: 2.2.1 Release Date: November 15, 2010 System Requirements: Hard Drive: 100 MB Space Available RAM: 128 MB Minimum Operating System: Windows 2000, XP, Vista, Windows 7, 32/64 bit CPU: Pentium III 750 MHz Macintosh (R) OSX version 10.3 or later CPU: 333 mHz Notes: This firmware can be installed in the following models: JBL LSR4312SP Subwoofer This update DOES NOT pertain to the JBL LSR4328P and LSR4326P. This version is identical to version 2.2 and allows updating of firmware using Windows computers with Windows Vista, Windows 7 operating systems as well as Win 2000 and XP. Macintosh customers should use the existing version 2.2 The .ZIP file includes the correct Firmware Installation Flasher and firmware file for the LSR4312SP Subwoofer. Do not use this file to update LSR4326P and LSR4328P. For installation instructions, read LSR4300 Firmware Instructions file . For technical support in the USA, contact JBL Customer Service Monday through Friday, 8:00am - 5:00pm Pacific Coast Time Call (800) 8JBLPRO (800-852-5776) or go to our website at www.jblproservice.com