Norsonic Nor275 Hemi-dodecahedron Loudspeaker Back in Production
Due to high market demand, Norsonic has resumed production of the Nor275 hemi-dodecahedron loudspeaker for ISO 16283-1 field testing. A one-page datasheet is in preparation.

Due to high market demand, Norsonic has decided to resume production of the Nor275 hemi-dodecahedron loudspeaker. The Nor275 is listed again on the Norsonic website, and Norsonic is preparing a one-page product datasheet with further information and technical specifications.
What the Nor275 is
The Nor275 is a floor-standing sound source for in situ building acoustics measurements to ISO 16283-1. It stands directly on the floor and uses the floor as a reflecting surface, so a compact six-driver source gives uniform sound radiation.
Key figures
- Sound power: 120 dB (Lin) with the Nor280 power amplifier, pink noise and equalisation
- Drivers: 6 x 6 in
- Power: 100 W RMS max., 500 W peak
- Impedance: 5.3 Ω
- Weight: 6 kg
- Continuous operation: more than one hour at full power
- Standards: ISO 16283-1 Annex A, ISO 354, ASTM E90, ASTM E336
The Nor275 must only be used with the Nor280 power amplifier. Norsonic states that other amplifiers may damage the loudspeaker and will invalidate the warranty.
Availability
The Nor275 is available to order again through PLACID Asia. See the Nor275 product page or contact us for a quotation.