Powerful multichannel sound tools for Bose L1 systems, with controls so advanced they adapt to you and your instrument. Four-channel engine features proprietary ToneMatch presets, intelligent zEQ and a large suite of professional-quality effects and processors. Digital multichannel mixer designed for use with Bose® L1® sound systems. Features over 100 proprietary ToneMatch presets for instruments and microphones. Includes Bose zEQ, storable scenes and a suite of studio-class effects, and all factory presets and firmware updates are available free online.