Amazon.com: PK Power 18V AC DC Adapter Compatible with Presonus Audiobox 1818VSL PreSonus Central Station, DigiMax FS, Fire Studio 26x26, AudioBox 1818 VSL 12-18VDC 18VDC 2.6A - 3A Power Supply : Musical Instruments
PreSonus AudioBox 1818VSL USB Audio Interface, 18-in/18-out
PreSonus AudioBox 1818VSL Advanced 18x18 USB 2.0 Recording System | RK Audio
Amazon.com: UpBright 18V AC/DC Adapter Compatible with PreSonus Audiobox 1818VSL Audio USB Midi Central Station DigiMax FS Fire Studio 26x26,Audio Box 1818 VSL 12-18VDC 2.6A 12V Power Supply Charger PSU (Barrel) :