The Allen & Heath dLive C2500 128 channels digital audio mixer features 20 moving faders, each with 6 layers accessed by dedicated keys. All fader strips are configurable as input channels, mixes, FX sends, FX returns, DCA masters, or MIDI strips. Each fader strip have a dedicated PAFL, Mix, Select, and Mute button with indicators, 10-segment multi-point meter, 4-segment gain reduction meter, rotary encoder, and coloured LCD display with name, mode, status, and level indicating. 7 buttons with indicators provide global mode for the rotary controls being Gain, Pan, Sends and up to 4 custom functions. Send levels to mixes are adjustable using the faders. A 12” capacitive touchscreen is provided for access to channel processing, meters, FX, I/O, scene management, setup, utilities and diagnostics. Physical, dedicated controls shall be provided for the 4-band PEQ. Further physical controls are user assignable, including 6 rotary encoders arranged over 3 layers, and 19 user-defined keys. Dedicated keys is provided for quick Copy/Paste/Reset of mixes and processing parameters, pre/post and mix assignments, scene safes, GEQ fader flip, PAFL clear, scene automation, talkback, and access to libraries. 22-segment meters indicate the 3 Main mix levels, the PAFL signal overrides the LR meters accompanied by a PAFL-active indicator. ¼” and 3.5mm jacks for the surface PAFL headphones output are provided, plus an analogue output level control. dLive C2500 surface includes a 2-track record and playback system for optional USB drives. The surface has 2 USB ports on the front, one of which dedicated to record / playback. The surface provides 6 XLR inputs of high quality and capable of handling microphone or line signals, with remote controlled analogue gain adjustable in 1dB steps, a 20 dB PAD, and phantom power. It also provides 6 XLR line outputs, 1 AES-3 stereo XLR inputs with SRC, and 1 AES-3 stereo XLR outputs with SRC. There is an option to bypass the Sample Rate Conversion on the digital inputs or outputs. A 128-channel I/O port for an optional digital interface module shall also be provided. Optional interface modules shall include: MADI, EtherSound, Dante, Waves SoundGrid, and ACE. An Ethercon port is provided for connection to the rack engine via the Allen & Heath gigaACE protocol. This connection carries over 300×300 channels of uncompressed audio at 96kHz, control data and tunnelling of third party Ethernet traffic. An Ethercon port is provided for I/O expansion via an audio connection carrying up to 32×32 channels of uncompressed audio at 96kHz. A range of optional expansion racks is provided and includes a modular rack with 8-channel card options including analogue or digital I/O. A BNC connector is provided on the unit for Wordclock input and output. A pair of RJ45 sockets are also provided for gigabit Ethernet network connections to laptops or other control systems. The unit has a fixed power supply accepting AC mains voltages of 100~240V, 50/60 Hz, 110W max via an earthed 3-pin IEC male connector. A rocker switch is provided near the mains inlet to isolate the unit from the incoming mains supply. An option is provided for password protection for log-in of several users with different levels of system access and permissions.