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A4930 • Four Output Microphone/Line Hub 


Cat. Page 68


  • $375.00
  • 2+ $340.00
  • Price per each
  • Includes GST


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Last updated 22-08-19 02:20:13

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  • Accessories
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Microphone/Line Pre Amplifier Wallplate


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Half Rack Metal In Fill Panel to Suit H 4990


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  • Overview
  • Specifications


This Microphone/Line Hub is designed to accept audio from up to four A 4931 Mic/Line Preamp wallplates. The A 4931 wallplate accepts either a microphone or line input and converts the signal to a balanced high level output. The 3V output signal is carried via Cat5e cable, (suitable for distribution up to 300m without interference) back to the Hub. Mic input is via a balanced XLR whilst the line input is via 2 x RCA sockets or 3.5mm audio jack for portable devices with a lower level line output.

The Hub has a dedicated output for each wall plate, with front mounted volume controls for each output. Each output can be DIP switch selected to be fed to a dedicated mixed output. Each output including the mixed output has DIP switch selectable balanced mic/line, or unbalanced line level outputs which can be fed directly into amplifiers. The Hub is powered by 24V DC from the supplied plugpack.


  • Connects to A 4931 Microphone/Line Pre-Amplifer Zone Wallplate.
  • Connect up to four audio zones together.
  • Easy Cat5e/6 UTP data cabling connection.
  • Up to 300m cable runs out to zones.
  • Balanced Euro terminal block connections.
  • Balanced mic or line level operation.
  • 24V DC operation.
  • Australian designed & assembled.

Rack Mounting
To mount any of the Redback half rack products into a 19" wide racking system, the H 4990 bracket is required. If a single product is mounted into the H 4990, then a metal (H 4992) or plastic (H 4993) infill panel can be fitted for a neater finish.

100% developed, designed & assembled in Australia.
Since 1976 Redback PA products have been manufactured in Perth, Western Australia by Altronics. With over 40 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support. Read more about our Australian Made products

Backed by an industry leading 10 Year Manufacturer Warranty.
Our Redback products have a long tried and tested history of bulletproof reliability. Altronics offers a 10 Year Warranty on all Australian Made Redback products. Our local in-house service department has all the know how to answer technical queries and provide timely service. Read more about our industry leading warranty.


  • Output Mic Level: 3mV
  • Output Line Level: 1V
  • Output Connectors: Audio Outputs: Euroblock terminals
  • Input Connectors: Wall Plate Inputs: RJ45 8P8C
  • 24V DC Power: 2.1mm JACK (centre +ve)
  • 24V DC Power: Euroblock terminals
  • Controls: Volume1-4: Front Volume
  • Power Supply: 24V DC @ 1 Amp
  • Dimensions: 210W x 122D x 44H
  • Weight: 0.4 kg

*Specifications are subject to change without notice.

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