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USB RTA Meter (Pro Edition)

RTA analyzer and USB microphone for measuring AFC

  • Frequency range from 10 to 20,000 Hz
  • Amplitude range from 50 to 120 dB
  • Calibrated according to Audiomatica CLIO
  • Built-in precision ADC 16 Bit
  • Mini-USB receptacle
  • Free software
$339 Stocked
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The USB microphone intended for measuring the amplitude-frequency characteristic (AFC) and the harmonic distortion coefficient of an acoustic systems in the entire audible frequency range with high accuracy. The majority of the analogues use external amplifiers and ADC boards, which make considerable changes to the measured signal and require calibration. The precision analog-to-digital converter and low frequency amplifier inbuilt in USB RTA Meter allow receiving accurate values of measured signal in digitalised form on a PC or Android smartphone/tablet PC without additional calibration. The omnidirectional electret microphone inset that is used in the device has linear AFC which minimises the characteristic spread among the devices within one batch. High sensitivity of the device is achieved by using the inbuilt low frequency amplifier; lower-range value is 50 dB. A user can start work at once after the software provided in the package is installed and the USB RTA Meter is connected to a PC. The UAB microphone can also operate with any other software, which supports standard sound cards on Windows, Mac OS, Android and iOS! In spite of its low price the USB RTA Meter (Pro Edition) stood in the line-up with such distinguished systems as Audiocontrol, Behringer, Phonic, Audiomatica, etc.


The USB RTA Meter (Pro Edition) USB microphone has body of anodized aluminum that contains the highly sensitive omnidirectional electret microphone inset, low frequency amplifier and ADC unit with USB port for transmitting data. In the body of the device around the microphone inset there are special notches for receiving smoother directional characteristic. The acoustically correct construction of the device allows receiving an input signal that is close as possible to the original one. If necessary the microphone can be installed on the stand.


  • Measuring the characteristics of home, car or concert hall acoustic systems in the entire audible range
  • Setting of acoustic systems
  • Defining and setting the cut-off frequencies for crossovers and inbuilt filters
  • Fine harmonizing of an audio system components
  • Preparation and holding autosound contest on the sound quality (SQ)
  • Spectral analysis of a signal - getting the AFC
  • Quantitative evaluation of the frequency-response ripple
  • Defining the harmonic distortion coefficient
  • Receiving and analysing the signal waveform

Package Contents

  • USB microphone
  • Connecting USB cable for connecting to a PC
  • Spl-Lab Measuring Center software for Windows and Android
  • Audio tracks for tuning (sine, sweep-tones, noise)
  • Spl-Lab provides a guarantee for all equipment sold for a period of 12 months from the date of purchase. The warranty provides for the repair of equipment in the service center at the expense of the manufacturer or replacement with similar equipment.
  • The warranty covers defects caused by the manufacturer and does not cover mechanical damage or violation of the terms of use and storage.
  • The warranty is terminated in case of repair or attempted repair of equipment by persons / organizations not authorized by Spl-Lab.
  • The warranty does not cover potential damage, loss of profits, loss of data and other direct or indirect losses related to equipment malfunction.
  • Warranty service for products purchased through a third party (distributor) is provided through a third party.
  • The decision on warranty repair or replacement is made on the basis of technical expertise carried out by the Spl-Lab service center.