
Volume controller with “Override” function | dual-channel | 30W per channel | 4–16Ω | 5 volume adjustment levels | ABS plastic | flush-mounted
Code: WH-2FRSA dual-channel audio volume controller designed for convenient, safe, and reliable sound level control in various audio systems. The device features an “Override” (priority) function that automatically bypasses the user-set volume during emergency or priority announcements.
Thanks to its compact design, durable ABS plastic housing, and easy installation, the WH-2FRS is well suited for both residential applications as well as commercial and public address (PA) systems.
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Technical specifications
Number of channels: 2
Rated power:
30 W per channel
Up to 60 W (both channels controlled simultaneously)
Operating impedance: constant 4–16 Ω
Volume control steps: 5 levels
Override control signal: DC 12–24 V / 20 mA
Housing: high-quality ABS plastic
Design: rounded corners, modern shape
Installation: wall-mounted (flush-mounted)
Purpose: audio volume control in low-impedance systemsFunctions
Dual-channel volume control – allows simultaneous control of two audio lines while maintaining balance and constant impedance
Constant impedance support (4–16 Ω) – ensures safe amplifier operation and stable audio signal regardless of volume level
5-step volume control – clear and convenient volume selection without complex settings
Override (priority) function – when a 12–24 V signal is received, volume limitation is bypassed; ideal for evacuation, alarm, or emergency announcements
Impact-resistant housing – retains its shape and is resistant to daily use and mechanical stress
Synchronous channel control – both channels are controlled with a single knob, ensuring simple and convenient operationApplications
For home users: multi-zone home audio systems, background music control in different rooms, a simple, clear, and reliable solution for everyday use
For engineers / designers: public address (PA) systems, emergency announcement and evacuation solutions, projects requiring priority audio control (Override)
For electricians / installers: quick and easy installation, clear wiring diagram, compatibility with 4–16 Ω systems, a reliable component for professional installations
Other use cases: offices, shops, schools, hotels, restaurants, conference halls, corridors, stairwells, shared areasAdvantages
Two channels in one device
Constant impedance – safe amplifier operation
Override function – suitable for safety systems
Up to 60 W total power
Durable and aesthetic ABS housing
Simple and reliable operationDisadvantages
No separate volume control for each channel
Designed only for low-impedance (4–16 Ω) systems
No digital control or displayIllustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.
CE certification means that the product has been evaluated according to the main criteria:
Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purposeCE marking allows this product to:
be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environmentsThe CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.
What does this mean for you as a buyer?
Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions
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