Digital Zone Processor/Router, 6 x 4


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  • 6 inputs/4 outputs
  • Mic gain on channels 1-4
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The 641m features a total of six inputs and four outputs. Inputs include four balanced mic/line switchable terminal block inputs and two mono-summed pairs of unbalanced RCA inputs. Hardware-controlled microphone gain allows adjustment of microphone gain per channel.

The 641m device has a pre-configured architecture with input processing, a central matrix and output processing. Two input insert positions and one output insert position allow channel-specific insert processing to be configured. AutoWarmth®, a psychoacoustic function that maintains full frequency bandwidth even when the signal level has dropped, is permanently available on each output zone.

A link bus allows duplication of the first six audio channels to another ZonePRO device in applications where additional output zones are required.

The front panel of the 641m features a power status LED, a network traffic LED, and an RS-232 control port.

Additional system control is offered in the form of optional Zone Controllers. This collection of hardware wall-controllers represents a series of simple, elegant user interfaces for functions such as volume, source and preset control.

All ZonePRO devices can be controlled by third party control systems via RS-232 or Ethernet as applicable (see table for further information). ZonePRO Designer—the configuration, control and monitoring software for the ZonePRO family of devices—offers control of the ZonePRO 641m via Ethernet or RS-232. The Configuration Wizard within ZonePRO Designer guides users through the step-by-step configuration process of the 641m.


  • 6 inputs/4 outputs
  • Mic gain on channels 1-4
  • Two configurable input insert positions, one output
  • AutoWarmth per output zone
  • Ethernet control


  • Front Panel LED Indicators: Network Traffic, Power
  • Analog Inputs: 6 total (4) Switchable mic or line, (2) unbalanced, mono-summed RCA input pairs
    • Type: Euroblock (Mic/Line), RCA (Source)
    • Impedance (Euroblock): >50k ohm Balanced, >25k ohm Unbalanced, RF filtered
    • Impedance (RCA): >25k ohm Unbalanced, RF filtered
    • Max. Input Line Level: +20dBu Mic/Line, +12dBu RCA
    • CMRR: >40dB, typically >55dB @ 1kHz
    • Mic Pre Gain: 30 to 60 dB
    • Mic Input Noise (E.I.N.): < -118dBu, 22Hz-22kHz, 150 ohm Source Impedance
    • Mic Phantom Power: +15VDC
  • Analog Outputs: 4 total
    • Type: Electronically balanced, RF filtered Euroblock
    • Impedance: 120 ohm Balanced, 60 ohm Unbalanced
    • Max. Output Level: +20dBu
  • A/D Performance
    • Type: dbx Type IV Conversion System
    • Dynamic Range Line: >113dB, A-weighted, >110dB unweighted
    • Type IV Dynamic Range: >119dB, A-weighted, 22kHz; BW: >117dB, unweighted, 22kHz BW
    • Sample Rate: 48kHz
  • D/A Performance
    • Dynamic Range: 112dB A-weighted, 109dB unweighted, 22kHz BW
  • System Performance
    • Dynamic Range: >109dB A-weighted, >106dB unweighted, 22kHz BW
    • THD+N: 0.003% typical at +4dBu, 1kHz, 0dB gain
    • Frequency Response: 20Hz-20kHz, +/-0.5dB
    • Interchannel Crosstalk: >80dB typical
    • Crosstalk input to output: >80dB
    • Propagation Delay: 0.6 msec
  • Power Requirements
    • Operating Voltage: 100 VAC, 50/60Hz, 120 VAC, 60Hz, 230VAC 50/60Hz
    • Power Consumption: 29 watts
    • BTU: < 92.13
  • Weight: 6.8 lbs
  • Dimensions: 1.75" (1U) x 19" x 7.75"
  • Safety Agency Certifications: UL 60065, IEC 60065, E 60065, EN55013

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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