With a panel the source selection can be controlled (only applicable for ZP 1260 / 1261, because only here 8 sources can be selected).Technical DataNo infoDocumentsDatasheet, english 2 pages, 832 kByteManual, english 8 pages, 1 MBMatching Products dbx DriveRack 4820Speaker management system with 4 inputs/8 outputs (analog and digital) and optional expansion cards. dbx ZonePRO 1260Audio matrix with user interface, mix functions, 12 inputs/6 outputs, 2 mic/line inputs, S/PDIF, DSP, RS-232 and Ethernet connection. dbx ZonePRO 1260MAudio matrix with control element, with mix functions, 12 inputs/6 outputs, 6 mic/line inputs, S/PDIF, DSP, RS-232 and Ethernet connection. dbx ZonePRO 1261Audio matrix without controls, mix functions, 12 inputs/6 outputs, 2 mic/line inputs, S/PDIF, DSP, RS-232 and Ethernet connection. dbx ZonePRO 1261MAudio matrix without control element, with mix functions, 12 inputs/6 outputs, 6 mic/line inputs, S/PDIF, DSP, RS-232 and Ethernet connection. dbx ZonePRO 640Audio matrix with control element, 6 inputs/4 outputs, 2 Mic/Line inputs, DSP and RS-232 connection. dbx ZonePRO 640MAudio matrix with control element, with mix functions, 6 inputs/4 outputs, 4 Mic/Line inputs, DSP, RS-232 and Ethernet connection. dbx ZonePRO 641Audio matrix without control element, 6 inputs/4 outputs, 2 Mic/Line inputs, DSP and RS-232 connector. dbx ZonePRO 641MAudio matrix without control element, with mix functions, 6 inputs/4 outputs, 4 mic/line inputs, DSP, RS-232 and Ethernet connection.