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A4212 • 280VA Hearing Induction Loop Amplifier


Cat. Page 58


  • $904.55
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Last updated 11-09-18 10:20:13

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  • Overview
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Hearing induction loop amplifiers are installed to greatly enhance the listening experience of people using hearing aids. They are commonly installed in public areas which are generally noisy, making it difficult for hearing impaired users to hear clearly. Both models have been engineered to meet AS60118.4-2007 and include a compressor/limiter circuit with tailored frequency response ensuring excellent speech intelligibility. They will operate into loads of less than 2 ohms and are short circuit proof. Great for places of worship, community halls, museums etc.

The A 4212 280VA model delivers 8A RMS, 11A peak and is suitable for areas of approximately 650m2. Note that coverage may vary from site to site depending on outside influences such as steel reinforcement, high current electrical wiring etc.).

Inputs are provided for balanced mic and line, auxiliary and an input with VOX muting for interfacing into venue emergency evacuation system.


  • Designed to meet AS60118.4-2007
  • Coverage up to 650m2
  • XLR line & mic inputs
  • Aux input via stereo RCA
  • EWIS signal connection (RCA)
  • Short circuit proof
  • Compressor for added speech intelligibility
  • Adjustable VOX sensitivity
  • Compatible with single loop designs

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.


  • Measrurements referenced to 1kHz
  • A 4212 drive current: 8A RMS, 11A Peak
  • Loop requirements: 0.2Ω to 1.7Ω preferred range
  • Frequency response: 100Hz to 5kHz @ -2dB, 80Hz to 6kHz @ -3dB target.
  • THD: <0.25% @ 50% drive
  • Compressor: 2:1 for dynamics control (fast attack)
  • Input: 3 pin XLR, Stereo RCA
  • Output: Loop connection via pluggable terminals
  • Power: 240V ac
  • Dimensions: 432W x 380D x 88H
  • Weight: 7.4kg

*Specifications are subject to change without notice.

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