Gracey & Associates   01234 708835

Gracey Logo

Sound and Vibration Instrument Hire and Calibration

NTi Audio DS3/PA3 Dodecahedron Speaker Set

NTi Talkbox NTi Talkbox
NTi Audio DS3 Dodecahedron Speaker £ 10 a day *
NTi Audio PA3 Power Amplifier £ 10 a day *

The Dodecahedron Speaker Set, comprising of the DS3 Dodecahedron Loudspeaker and the PA3 Power Amplifier, is the measuring equipment designed for professionals for use in their daily measuring tasks in room and building acoustics. Optimized design, combined with unique precision, low weight and flexible operation establish this equipment as a reference in the marketplace.


The DS3 Dodecahedron Loudspeaker is built from twelve specially-developed dynamic drivers that ensure a uniform emission of the acoustic test signal. The PA3 Power Amplifier supplies an equalized pink noise to the DS3. The combination of PA3 and DS3 thus generate an acoustically-flat pink noise under free-field conditions.

DS3 Dodecahedron Speaker

The DS3 Dodecahedron Speaker is minimized in weight while providing maximum performance and long-term stability. With only 7.5 kg and a typical sound power level of 121 dB, the DS3 is most suitable for use on site. The high-performance dynamic driver frames are made of solid aluminum. This provides efficient heat dissipation and hours of level stability. The robust protective grilles prevent damage to the membranes under tough transportation and working conditions. Using the DS3 as a reference sound source provides precise measurement results

PA3 Power Amplifier

The portable PA3 Power Amplifier contains a DSP-based signal generator with equalizer. In conjunction with the DS3 Dodecahedron Speaker, a pink noise is produced with an acoustically flat frequency response. The equalization ensures that the ISO 16283-1 requirement of = 8 dB difference between contiguous 1/3rd octave bands in the emitted sound is met. A test signal optimized for maximum sound power is available as well as an external audio input socket. All operating components are positioned on the sloping sides of the amplifier and illuminated - thus easily recognizable and accessible from a standing position. The test signal can be switched on and off from outside the measuring room with the push of a button on the supplied radio remote control.

For more details see the DS3/PA3 Manufacturer's Specifications

* Our standard hire charges are based on a 4-day minimum period, details other options.

page up