​Dodecahedron sound source, Qohm,
for acoustics and insulation testing

  • Extreme light weight, by far the lightest full frequency range source Source weight only 3.1 kg, diameter 26 cm
  • Work efficiency, On-site measurements done by any single person, The set-up and tests are faster, and more relaxed. Compact tripod, light trolley, and light and compact Qam amplifier, if needed
  • Highest level specifications, Based on proprietary Qsources 4-inch driver technology. No separate subwoofer needed in normal situations

Applications

  • On-site airborne sound isolation
  • Reverberation and absorption
  • Hall/Room acoustics
  • Small up to very large buildings
  • Road-railway infrastructure
  • Barrier performance
  • Building element performance
  • General airborne excitation

Specifications

  • Frequency range: 
  • Omni-directionality: ​ ​
  • Sound power level:


  • Output level stability:



  • Mounting thread: 
    Dimension, weight: 
    Power requirement: 
50-16000 Hz, 1/3 octaves
​+-1.5 dB from 50-2500 Hz
​123 dB+- 1 dB Lw, 2 minutes**
​116 dB Lw, 15 minutes**
​50 Hz 1/3 oct. 98 dB Lw

​better than 0.5 dB, during 10 minutes at 116 dB**
better than 0.5 dB, during 1.5 minutes at 123 dB**
​UNC 3/8-16
​26 cm diameter, 3.1+-0.1 Kg.
​800 Watt RMS to 4 Ohm***
​*These specifications may be adapted if necessary to improve the quality 
**When driven with Qam generated low crest-factor pink noise at 22 Celsius ambient temperature or lower.
*** For maximum performance a dedicated power amplifier type Qam is available from Infra-Qsources.

Data Sheet & Product Information