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https://www.audflyspeaker.com/products/audfly-r2-ceiling-speakers-round-for-museum/

Audfly Model R directional loudspeakers are specially designed for ceiling scenarios and are aesthetically in harmony with the surrounding environment. It can provide a person or group of people with high-quality audio in a public setting without disturbing the surrounding environment.
Audfly R2 Ceiling Speakers Round For Museum
ModelFSC3-R2
Maximum Sound Pressure Level (Volume)87±3dB@1m/2KHz
Directivity Angle<15°(-20dB)
Frequency Range500Hz-13kHz
Rated Power15W
Input Sensitivity1 Vrms
Max Input2.8Vpp
Input Interface3.5mm AUX/ RCA
Power Requirements24V DC/3A
Dimensionφ237*54.2mm
Weight800g
Installed Accessories22*50mm Spring Buckle
Optional Installed Accessories75*75mm Universal Bracket
Surface Treatment/ColorWhite
Matching Power AmplifierBuilt-in Type
Power Adapter(Input) 110-220Vac 50/60Hz  (Output) 24V DC/3A
Audio Line3.5mm Dual-Channel Audio Cable/ RCA Audio Cable

Functions of Audfly R2 Ceiling Speakers Round For Museum
Flexible Install Type: Wall mounted or ceiling mounted based on clients' demand.

Super Directional Transmission: Create focused audio zones in certain area without increasing the overall ambient noise level.

Applicable to Multiple Scenarios: Almost all the scenarios you need for audio directive transmission usage, such as museum, gas station or showroom, etc.

We provide parametric speaker, Long range directional speaker, uni-directional speaker, directional in ceiling speakers, etc. For more information, please feel free to contact us!