Hemi-dodecahedron loudspeaker Nor275

A powerful sound source designed for building acoustics measurements per ISO 16283-1:2014 (replaces ISO-140/4 Annex A (Field measurements)).

The source provides uniform sound radiation. When used with the power amplifier Nor282 (Nor280), the high sound power level ensures accurate descriptors in measurement conditions that include high background levels, high sound insulation properties and large room volumes.

Nor275 is designed for placement on the floor and uses the floor as a mirror for emitted sound.

The loudspeaker is designed to operate at full power for more than one hour continuously.

The Nor275 is designed to be used with the Nor282 power amplifier (Nor280 power amplifier) only. Using other amplifiers may damage the speaker and will void the warranty.

Typical sound power level vs. frequency of the hemi-dodecahedron loudspeaker Nor275 when used with the pink noise source and equalizer included in the power amplifier Nor280.

Nor275 fulfil ISO 16283-1:2014 standard for airborne insulation measurements in field.
Powerful – 120 dB Lw
Lightweight (6 kg / 13.2 lb), portable and rugged design for field use.

Specifications

Physical design: Hemi-dodecahedron
Sound power output: Using the Nor282/Nor280 with pink noise, and equalisation: 120 dB (Lin)
Speakers: 6×6”
Power (broadband): 100 WRMS (max), Peak 500 W
Impedance: 5.3 Ω
Diameter: 355 mm (14”)
Height: 195 mm (7.6”)
Weight: 6 kg (13.2 lb)

Acesssoreis

Nor1494 Loudspeaker cable

Cable (/xm) for connecting Nor275 Hemi-dodecahedron loudspeaker to Power Amplifier Nor282/Nor280.

Nor1494/x consist of 4 pc 1,5mm² conductors. Maximum recommended length is 25 meters.

Nor1327C Flight case for Nor275/Nor280/Nor282

Rugged flight case Nor1327C with wheels and handle for the Hemi-dodecahedron Loudspeaker Nor275, tripod, Power Amplifier Nor280/Nor282 and miscellaneous accessories.
Dimensions: Length: 58 cm, Width; 58 cm, Height: 45 cm.
Photos just for illustration – the flight case can differ a little in newer version.