Zone Mix 761

  • A Paging and Background Music Control DSP
  • Total Solution Turn-Key Design
  • Near Zero Programming Time for Rapid Deployment
Symetrix Zone Mix 761 DSP

A Cost Effective DSP for Paging and Background Music Control.  Paging into 6 zones from 3 microphone locations, plus emergency page, with automatic ducking and priority arbitration.

Turn-Key Means Symetrix Did the Hard Work.  Plenty of inputs and outputs, the right kind of connectors, and a pre-designed GUI make for lightning fast deployment.

More Than Enough DSP.  All twelve input and six output channels feature a full complement of processing including: dynamics, feedback elimination, ambient noise sensing, EQ, and loudspeaker management resulting in a world class audio experience.

Comprehensive External Control Options.  ARC wall panels, ARC-WEB, and/or 3rd party touch-screens via RS-232 or UDP/IP.

An Embedded Web Server for Status and Even More Control.  Zone Mix 761’s embedded web server hosts ARC-WEB – a browser-based interface for smart phones, tablets, and computers.

Help is built in.  The software connection wizard provides fast and easy IP linking to the DSP hardware. The external control wizard guides effortless programming of multiple user control devices. Learn more about the Zone Mix 761 software here.

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AutoCAD File

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Software and Supporting Documentation


Number of Inputs Twelve (12) total; Four (4) switchable balanced mic or line, Eight (8) mono-summed stereo -10 dBV line level.
Connectors 3.81 mm terminal blocks (mic/ine), RCA (Audio Media source).
Nominal Input Level +4 dBu line or -36 dBu mic level (software selectable) with 20 dB of headroom.
Mic Pre-amp Gain +40 dB.
Maximum Input Level +23 dBu mic/line, +8 dBV RCA.
Input Impedance > 18 kΩ balanced, > 9 kΩ unbalanced, > 2 kΩ with phantom power engaged (Euroblock); > 20 kΩ unbalanced (RCA). CMRR: > 50 dB @ 1 kHz, unity gain.
Mic Pre-amp EIN < -125 dBu, 22 Hz - 22 kHz, 100 Ω source impedance.
Phantom Power +20 VDC, 20 mA maximum per input.


Number of Outputs Six (6) balanced line level.Connectors: 3.81 mm terminal blocks.
Nominal Output Level +4 dBu line level with 20 dB of headroom. For unbalanced analog output, do not connect the minus output terminal. Unbalanced configuration results in 6 dB lower output level.
Maximum Output Level +24 dBu.
Output Impedance 200 Ω balanced, 100 Ω unbalanced.


Sample Rate 48 kHz.
Frequency Response 20 Hz - 20 kHz, +/- 0.5 dB.
Dynamic Range > 110 dB (A-Weighted), input to output.
THD+Noise < -85 dB (un-weighted); 1 kHz @ +22 dBu with 0 dB gain.
Interchannel Crosstalk < -90 dB @ 1 kHz, typical.Latency: < 1.6 ms, input to output with all DSP inactive.

Mechanical Data

Space Requires 1U (WDH: 48.02 cm x 22.15 cm x 4.37 cm / 18.91 in x 8.72 in x 1.72 in), depth is specified from front panel to back of connectors. Allow at least 3 inches additional clearance for rear panel connections. Additional depth may be required depending upon your specific wiring and connections.
Electrical 100-240 VAC, 50/60 Hz, 25 Watts maximum. Universal input.
Ventilation Maximum recommended ambient operating temperature is 30 C / 86 F. Ensure that the left and right equipment sides are unobstructed (5.08 cm, 2 in. minimum clearance). The ventilation should not be impeded by covering the ventilation openings with items such as newspapers, tablecloths, curtains, etc.
Certifications or Compliance UL 60065, cUL 60065, IEC 60065, EN 55103-1, EN 55103-2, FCC Part 15, RoHS
Shipping Weight 8 lbs. (3.63 kg)

Architect and Engineer Specifications

The device shall provide four inputs that are selectable as line or mic level with phantom power; there shall be eight mono-summing line inputs fitted with RCA connectors. All signal processing, mixing and routing functions (including input gains) shall be controllable via software. Audio inputs and outputs shall be accessed via rear panel RCA and 3.81 mm terminal block connectors.

The Graphical User Interface (GUI) software shall be installer programmable using the Windows® XP or higher operating system. Computer connection and control shall be via the device’s rear panel Ethernet connector. The GUI shall provide display and control of all signal processing and configuration functions including (but not limited to): Input and Output Gain, Highpass Filtering, Parametric Equalization, Compression, Limiting, Automatic Gain Control, Ducking, Feedback Elimination, Signal Routing, Delay, Polarity.

The front panel shall include input and output signal level indicators as well as indicators for POWER, NETWORK, and ARC.

External control shall include dedicated software screens as well as preset selection, I/O level control and muting using the optional ARC wall panel remote controls via industry-standard CAT5 cable with RJ45 connectors. All program memory shall be non-volatile and provide program security should power fail. The device shall provide an on board real time clock to facilitate automatic, timed changing of presets. Third-party control systems may interface over IP and RS-232 using a published ASCII control protocol.

Audio conversion shall be 24-bit, 48 kHz. The dynamic range of the processor shall not be lower than 110 dB A-weighted.The device shall have a captive power input socket for an external 24 VDC supply.

The device shall meet UL/CSA and CE safety requirements and comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The chassis shall be constructed of cold rolled steel and moulded plastic, and mount into a standard 19” 1U EIA rack. The device shall be a Symetrix model Zone Mix 761.


  • Interconnect Cables

ARC Wall Panels

  • ARC-EX4e Front
  • ARC-K1e Front
  • ARC-PSe Front
  • ARC-SW4e Front


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