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FeONIC D2 drives can be used to convert new and existing structures of commonly used resonant building materials into high quality loudspeakers. The D2 was designed to work on large steel panels in an outdoor marine application to replace unsightly horn speakers from a 100V line input. The structural surface performs as a highly intelligible powerful distributed mode (non-directional) speaker suitable for both audio reproduction and public address systems, satisfying the EN60849 standard for acoustic quality in public places.

The D2 is unlike traditional speaker technology because it uses a very high powered magnetostrictive smart material as the driver instead of a moving coil. The material was originally developed by the US military for sonar applications and is now de-restricted for commercial use. The magnetic field that causes the smart material inside the sounder to react is created by drive coils around the material. The smart material sounder exhibits much superior properties over conventional speaker technologies.

PA systems require high intelligibility. EN 60849/1998 requires higher levels of intelligibility and clarity for public places. FeONIC D2 Drives provide a more even distribution of sound than directional traditional speakers - the whole panel becomes the speaker cone, creating an omni-directional, evenly distributed output. The frequency response of the output is not affected by the position of the listener relative to the sounder so all valuable speech information is communicated unlike directional solutions. The D2 can also be driven at low volumes, filling greater spaces more consistently than directional speakers with much less echo.

Impedance: 4 Ohms
Integrated Circuitry: 100V line transformer
Operating temperature range: -20oC to +120oC (-50oF to 248oF)
Storage temperature range: -50oC to +120oC (-122oF to 248oF)
Weight: c3.4kg
Dimensions: 192mm (H) x 160mm (Footprint Diameter)
Mounting method: Mounting plate welded/bonded to surface, sounder mounted to plate with screws
Connection to amplifier: 100V Transformer
Maximum power rating: 50W – 12.5W/25W/37.5W/50W
Sensitivity1: 80dBA @ 1m
Typical Bandwidth: 150Hz-15,000Hz
Sound Pressure Level4: Peak 103dBA (SPL 100dBA) @ 1kHz 1m
Speech Transmission Index / Common Intelligibility Scale5 0.60 to 0.75 / 0.78 to 0.88
Environmental protection: IP67 Flammability UL Rating: 94-V0
Material/Colour: Cover:Polyamide/ Signal white RAL 9003
Base: Aluminium/ Signal white RAL 9003

1Sensitivity measured with 1kHz sine wave at 1Watt, 4Max Sound Pressure Level (SPL) achieved with sounder mounted on the same side as measurement with 1kHz sine signal just prior to input signal distorting, 5STI/CIS values, measured to IEC Standard 60268-16, are typical values since it is dependent on acoustics of installation site.