Universal 4.1 MLR»Web – Web-based RJ45/XLR Switcher w/ Silence/AES Loss Detector

The Universal 4.1 MLR»Web is a web-based transparent four input, one output switcher/router with mechanical latching relays designed to pass AES or stereo signals. The unit may be configured to monitor the output for analog audio silence or loss of AES clock when configured for AES switching. It features a browser-based HTML5 web interface and supports SSL/TLS email (Gmail, etc.), SMS-email notification, as well as SNMP.


The Universal 4.1 MLR»Web is perfect for all types of passive signal switching via front panel switches, contact closures, logic or web interface. Each input features stereo female Neutrik XLR and standard RJ45 audio jacks. The output features stereo male XLR and standard RJ45 audio jacks. Switching is accomplished via mechanical latching gold contact relays, which means that the unit can route a signal in either direction and will keep routing signal even after losing power. Due to the passive nature of the switching, any input level and impedance can be used. Inputs may be balanced or unbalanced, while output levels, impedance, distortion, noise and balancing will match that of the selected input.

Product Features

  • Front panel channel selection push buttons with active channel LED indicators.
  • The “MUTE” function with LED indicator allows the user to turn off all audio.
  • Front panel Enable switch with enabled LED indicator can be configured to provide a safety lock to the front panel selection push buttons.
  • Built-in web server provides simple, web based (HTML5) notification, monitoring, configuration and control.
  • Internal silence sensor with front panel activity and alarm LED indicators.
  • Front panel, opto-isolated remote control, and web-based switcher controls.
  • Silence trip level detection from -20dB to -35dB in 5 dB steps for each stereo channel.
  • Precise alarm time delay from 0(OFF) to 65535 seconds (18 hours, 12 min and 15 sec’s). in one-second increments for each channel.
  • Alarm restore time delay from 0(OFF) to 65535 seconds (18 hours, 12 min and 15 sec’s) in one-second increments for each channel.
  • Email notification may be configured to alert up to EIGHT recipients when alarms are detected.
  • Email logging of system status, along with the site ID may be emailed in time spans from once an hour to once a day.
  • Support for STARTTLS secure SMTP authentication (Gmail, etc.).
  • Support for SNMP monitor and control.
  • Signal switching via mechanical latching sealed relays utilizing 2-form-C bifurcated – crossbar silver alloy with gold overlay contacts.
  • Opto-isolated remote control or automation trigger GPI’s via contact closures, 5-volt TTL/CMOS logic levels or web UI.
  • Four normally open relay contact closures for remote channel status.
  • Stereo XLR and standard RJ45 audio jacks.
  • Removable euro-block screw terminal connectors are used for remote control connections. Necessary mating plugs are supplied.
  • If power is lost, the last selected channel is passed to the output.
  • Powered by a high-performance ARM® Cortex™processor
  • Fully RFI proofed.
  • Surge protected internal power supply, 9 VDC universal switching power supply with domestic connector supplied. International connectors optional.
  • Small 1-RU rack chassis.

Automation source switching; Studio selection and routing; Audio processing selection; Exciter input selection; Remote broadcast input selection; STL source selection; Multiple station program on-hold and/or PA switching; EAS audio switching; IFB selection; Satellite audio channel switching and console monitor input and output selection.