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7 Acquiring the IMX644 Manager Software and Manuals ....... 7 Controls and Functions Front Panel ........................................................................... 8 Rear Panel.......................................................................... 10 Connections System Example................................................................. 12 Connectors and Cables ...................................................... 13 Mix Functions Input Channels ................................................................... 15 Output Channels................................................................. 17 Others................................................................................. 17 Appendix Troubleshooting.................................................................. 18 Memory Initialization........................................................... 18 IMX644 Status List ............................................................. 19 Remote Control Protocol Specifications ............................. 20 General Specifications........................................................ 21 Input/output Characteristics................................................ 21 Electrical Characteristics .................................................... 22 GPI Circuit Example ........................................................... 23 Dimensions......................................................................... 24 Block Diagram .................................................................... 25 IMX644 Owner’s Manual 5 n Thank you for purchasing the Yamaha IMX644 Digital Installation Mixer. In order to take full advantage of the IMX644 functionality and to ensure trouble-free operation, please read this owner’s manual carefully before use. After you have read the manual, keep it in a safe place for reference when needed. Features ¦ Versatile Input/Output Configuration The IMX644 features an input/output configuration that is ideal for a wide range of applications: six mono inputs, four stereo inputs, two stereo outputs, two mono outputs, and one dedicated stereo output for recording. ¦ 16 Memories Up to 16 sets of mixer settings can be stored in memory and instantly recalled as required. Four of the memories can be directly recalled via front-panel MEMORY [A] through [D] buttons. ¦ Optical Digital I/O Connecting to compatible devices (CD and DVD players, for example) via the optical digital interface allows accurate signal transfer with no loss of signal quality. The digital input features a built-in sample rate converter, so there is no need for word clock synchronization. Accessories •AC power cord • Rubber feet x 4 • Euroblock plug (3P) x 12 • Owner’s Manual (this document) ¦ Powerful Mixing Features •Parametric EQ Parametric equalization is provided on all input channels: 3band EQ on mono input channels, and 2-band EQ on stereo input channels. 6-band EQ is provided on all outputs except the recording output. • Feedback Suppressor Feedback suppression is provided on all six mono input channels. The Feedback Suppressor provides two stages of feedback prevention: static filters that can be set in advance, and dynamic filters that self-adjust in real time to control feedback. • Priority for Specified Voice or Music Sources The Priority Ducker automatically “ducks” (reduces the volume of) the background when a signal is applied to a specified mono input channel, making announcements stand out for greater intelligibility. All stereo inputs assigned to the same output channel are reduced to a specified level when priority input is detected. Music Override gives priority to a music source applied to a specified stereo input channel. All other stereo inputs assigned to the same output channel are muted when priority input is detected. • Delay Precise delays can be applied to all outputs to allow time alignment for a solid sonic image with clear imaging and optimum overall sound quality throughout the listening area. 6 IMX644 Owner’s Manual Precautions for Rack Mounting Precautions for Rack Mounting perature inside the rack, resulting in inefficient performance. To ensure that the heat produced by this device can be dissipated appropriately, please ensure the following conditions when rack- mounting it. • If multiple units are mounted in the same rack, leave a 1U rack space between every two units. Also either leave the open spaces uncovered or install appropriate ventilating panels to minimize the possibility of heat buildup. • When mounting this device together with other heat-producing equipment such as power amplifiers, leave 1U or more space between it and other devices. Install a ventilation panel in this vacant space or leave it open to ensure adequate cooling. •To ensure sufficient airflow, leave the rear of the rack open and position it at least 10 centimeters from walls or other surfaces. If the rear of the rack can’t be left open, install a commercially available fan or simil...