Cadac CM-SR-24 - 16-In/24-Out 4U Stage Box with 8 AES3 Inputs and Outputs

The Cadac CM-SR24 is 4U fixed configuration self-powered stage rack, featuring 16 Cadac mic-amps and 24 analogue outputs plus 8 AES3 inputs and 8 AES3 outputs. A 2.4" colour TFT displays the unit's menu structure along with an integrated headphone amp for local monitoring. The CM-SR24 connects to the console using Cadac's MegaCOMMS network protocol via coax cable or optical fibre.

The CM-SR40 unit is configured with 32 analogue inputs and 8 analogue outputs. The CM-SR24 has 16 analogue inputs and 24 analogue outputs, the CM-SR64 56 analogue inputs and 32 analogue outputs. All three units feature 8 AES3 inputs and 8 AES3 outputs on a total of 8 XLRs.

All analogue audio inputs and outputs are tolerant of 48 V connection and are short circuit protected. All the units are specified with NeutrikTM XLR connectors.

The units feature a 2.4" colour display, which, in conjunction with the two surrounding buttons and encoder, allows the adjustment of the incoming levels, Mic gain and phantom power settings. Plus, it provides straightforward selection of the unit's ID number, plus general unit settings and maintenance tools.

The integrated headphone amp (with a volume attenuator) allows the monitoring of both the inputs and outputs and adjustment locally to the gain via the menu attenuator.

All the units feature dual MegaCOMMS ports on the front panel for redundant connection to the console. Alongside the MegaCOMMS BNC ports are redundant duplex optical LC ports for connection runs of up to 2km and allowing easier integration into installations where the network back bone is optical.

Features

• 16 mic / line inputs on XLRs
• 24 balanced line outputs on XLRs
• 8 AES3 inputs and outputs on 4 balanced XLRs
• MegaCOMMS audio protocol available on:
  • 4 x RG6 BNCs
  • 2 x LC optical transceiver SFP ports
• 2.4 inch, (240 x 320 pixel), colour display
• Menu controls via 2 push buttons and encoder with push function
• 96 kHz, 24-bit Delta-Sigma A/D and D/A converters
• Low-noise, wide dynamic-range analogue mic pre-amps with remote and local gain control
• 1/4" stereo jack along with a volume attenuator
• Word Clock connector
• Ethernet port
• Front panel power switch

Specifications

General Specification

• Screen: 2.4-inch, 240 x 320 pixels, 262k colour display
• Power Supply Unit:
  • 2 x internal PSUs
  • 100-240V AC 50-60 Hz
  • Output requirements: +17 V, -17 V, +12 V
• Headphone Amp: 1/4-inch (6.35mm) 3-pole (TRS) With attenuator
• Inputs and Outputs:
  • 16 x XLR Mic Inputs (inc 48 V, PAD and 1 dB gain steps)
  • 24 x XLR Balanced outputs
  • 4 x XLR AES/EBU inputs
  • 4 x XLR AES/EBU outputs
• XLR
  • Neutrik connectors
  • Tolerant of 48 V connection and short circuit protected
• Comms: 2 x Cadac MegaCOMMS on:
  • 4 x BNC connectors
  • 2 x duplex optical LC ports
  • 1000BASE-LX/LH SFP 1310nm 10km DOM Duplex LC MMF/SMF transceiver modules using single mode fibre optic cable

Audio Specification

• Sample Rate: 96 kHz
• Processing Delay: Sub 0.4 millisecond latency through complete signal chain
• Internal Processing: 40-bit floating point
• ADC/DAC: 24-bit
• Frequency Response: 20 Hz to 44 kHz + 0.5 / -1.5 dB
• THD+N: better than 0.005% @unity gain, 10 dB input at 1 kHz
• Channel Separation: better than 90 dB
• Residual Output Noise: < -90 dBu (20 Hz - 20 kHz)
• MIC EIN: < -127 dB with 200 Ohm source impedance
• Maximum Output: 21 dBu