OS003A Omni Sound Source

OS003A comply with ISO 140-3 (GB/T 19889.3), ISO 140-4 (GB/T 19889.4) and ISO 3382 standard. Sound source can reach 120 dB (Pink) sound power level with suitable power amplifier. BSWA provide PA700, PA300 and YAMAHA P2500S power amplifier to drive sound source.

OS003A is the latest development of omnidirectional sound source of BSWA. The sound source has 12 rubidium magnet loudspeakers assemble on a 280 mm diameter sphere evenly. The angle between each axes of loudspeakers exactly the same to form a regular 12-sides structure. Each loudspeaker was selected via a careful process. The special electrical connection ensures the phase synchronization of each unit and guarantees the impedance match the power amplifier. Such design and implementation lead to a stable spherical radiation sound source.

OS003A can be place on flat surface by five rubber foot, hang in a test chamber by rings or mounted on a special tripod (option) by a supplied POM base socket. The stainless steel lifting handle makes it easy to transport and handling.

Compare to previous generation product, the new omnidirectional sound source is smaller size, lighter weight, more compact and wider scope of application. Easy to carry out reverberation time, airborne sound insulation and other building acoustics testing.

Product Features

 ● Professional equipment for architectural acoustics testing

 ● Lightweight and durable design, easy to transport and handling

 ● 12-sides design to ensure high quality acoustic performance

 ● Diameter: 285 mm, weight: 6.5 kg

 ● Recommended accessory:

        Power amplifier: PA300, PA700

        Software: VA-Lab Arch


 ● Building acoustics

 ● Reverberation time measurement

 ● Airborne sound insulation measurement

Technical Parameters
Standards ISO 140-3, ISO 140-4, ISO 3382, GB/T 19889.3, GB/T 19889.4
Impedance 6 Ω
Rated Power 250 W (Continuous)
Peak Power 500 W (Short Duration: duty cycle 1/5, on time 10 s)
Frequency Range 100 Hz ~ 12.5 kHz
Sound power level

120 dB re 1 pW (Pink)

Min. 100 dB re 1 pW in each 1/3 octave band of 125 Hz ~ 2.5 kHz

Audio Connector speakON socket
Loudspeaker Units Rubidium magnet loudspeaker, 4 inches, 8 Ω, 30 W
Diameter 285 mm (include loudspeaker), 280 mm (only sphere body)
Weight 6.5 kg
Shipping case Dimension (mm) W555 x H425 x D345

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