A/B speakers: Maximum safety through redundant sound reinforcement

A/B speakers are the first choice when it comes to fail-safe sound reinforcement in safety-critical areas. Whether used in voice alarm systems, public buildings or industrial facilities, they ensure that important announcements are transmitted reliably even in the event of a fault. Thanks to redundant signal routing, communication remains available even if one line path fails.

What makes A/B speakers special

The key difference lies in their redundant design: A/B speakers feature two separate speaker systems and two independent 100 V transformers. This allows them to be connected in parallel to two separate lines. If one line fails, the second automatically takes over – without interrupting the announcement.

This technology is particularly important for systems that need to meet the requirements of standards such as DIN EN 50849 or VDE 0828.

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Typical designs

A/B speakers are available in various versions to suit different areas of application:

  • A/B built-in speakers

  • A/B surface-mounted speakers

  • Moisture-resistant versions

  • Special versions

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Advantages at a glance

  • Redundancy
    Two independent signal paths for maximum fail-safe operation

  • Standards compliance
    Suitable for systems in accordance with DIN EN 50849 / VDE 0828

  • Reliability
    Reliable voice transmission even in the event of line faults

  • Flexibility
    Various designs for every installation situation

  • Integration
    Perfect for modern ENS and PA systems

  • Durability
    Robust materials and high-quality components

Areas of application for A/B speakers

A/B speakers are used wherever safety is the top priority:

  • Schools, universities and kindergartens

  • Hospitals, nursing homes and medical facilities

  • Shopping centres, department stores and supermarkets

  • Industrial halls and production facilities

  • Hotels, event venues and stadiums

In these environments, they ensure that evacuation announcements can be heard clearly and reliably at all times.

Applications
Train Stations
Shopping Centres
Hotels

Hospitals

Stadiums

Technical features

A/B speakers are equipped with two powerful full-range drivers and separate transformers. This allows different power taps to be implemented and flexibly adapted to the room acoustics. High-quality enclosures also ensure minimal resonance and clear, intelligible sound reproduction.

Planning and implementation

Planning a redundant sound reinforcement system requires experience and precise coordination. A/B speakers must be correctly distributed across both lines and optimally positioned to ensure complete coverage. Our team supports you in planning and implementing your system – from selection through to standards-compliant installation.

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Safety without compromise

A/B speakers are a key component of modern voice alarm systems. They provide the assurance that important information is always delivered in an emergency – clearly, intelligibly and without failure. Rely on proven technology for maximum operational reliability.

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