measurements and calculations

To developers and enthusiasts we offer:



Complex of measurements of electromechanical, acoustic characteristics of speakers

  • Speaker impedance characteristics
  • Thiele-Small speaker parameters. Resonance frequency (Fs). Quality factor (Qes, Qms, Qts). Equivalent volume (Vas). Effective area (Sd). Resistance (Re).
  • Frequency response of drivers in the near and far field. In the near field – frequency response at low frequencies. In the far field – frequency response at medium and high frequencies at a distance of the microphone from the speakers 1m. In the center of the acoustic axis and angular frequency response with a deviation of 15, 30, 45 degrees.

Calculations, design, manufacture

  • Calculations of acoustic design options and selection of optimal ones
  • Consultations, recommendations on the choice and application of speakers for your speaker system projects
  • Development, precise adjustment and manufacture of crossovers
  • Design, manufacture of cabinets for speaker systems

Important points

Why is it recommended to perform control measurements of the characteristics of exactly those instances of drivers that you plan to use in your projects?

Not all manufacturers provide accurate data on the characteristics of their drivers. Different specimens may have parameter deviations (sometimes significant) from the manufacturer’s reference parameters.

If you choose old “vintage” drivers, I strongly recommend measuring their current characteristics. Firstly, there are often discrepancies in the parameters are very significant for vintage drivers, and secondly, the characteristics change over time due to changes in the properties of the suspensions of diffusers, centering washers, magnets. Also, if your drivers are repaired, there is no guarantee that the characteristics that were before it will be preserved exactly. In this case, their parameters should also be updated before developing a speaker system.

Measurements of frequency response of drivers allow to determine the real sensitivity, identify problem areas of frequency response and predict methods of their correction.

Thiele-Small parameters alone are not enough to accurately calculate and design speaker system cabinets. Cabinets’ calculations based only on Thiele-Small parameters do not take into account the features of the frequency response of drivers at low frequencies, which can be quite different from the linear one. As a result, the cabinet can be designed and manufactured not optimally, which will negatively affect the frequency response in the low frequency range.

Guided by the measured data of Thiele-Small parameters and frequency response of drivers, it is possible to accurately perform calculations of cabinets and avoid errors in their manufacture. And be confident in the optimal solution and use the full potential of the selected drivers for the best results.

Cost of services

  • Thiele-Small parameters, impedance graphs of a pair of low, medium frequency or fullrange drivers – UAH 600.
  • A set of frequency response charts for a pair of low, medium frequency or fullrange drivers – UAH 600.
  • Measurements of parameters of a pair of high-frequency drivers. A set of frequency response graphs in the far field, impedance graph – UAH 600.
  • Design and manufacture of cabinets, development of crossovers are calculated individually according to the complexity of your project speaker systems

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