APM-X Wireless SPL Meter


APM-X Wireless SPL Meter



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The SSA Accuwave Pressure Monitor X (APM-X) is a highly accurate, very user friendly, affordable SPL meter that anyone with a Bluetooth connected Android, or Apple device (see requirments below) can use. Simply start the app on your device, connect to the APM-X via Bluetooth, and crank up your car stereo. The APM-X is the perfect choice for people who are doing testing & tuning, or hosting their own SPL competition, or just want to find out how loud they can go. The SSA Studio app is free as well as updates are free with No wires or software to install on your laptop. Just place the APM-X inside the vehicle and turn it on, connect it via Bluetooth and go to it.



  • Rechargeable battery with up to 7h battery life
  • USB-C reversible connector
  • Bluetooth 4.0 connectivity
  • Multiple sensors can be connected to the app
  • Two clients can connect to one sensor at the same time
  • Graphical OLED screen
  • Auto-shutdown after period of inactivity
  • Screen auto-rotation
  • Individually calibrated to <0.01dB error over the entire operating temperature range, with calibration reports for each sensor
  • Tamper-proof calibration tables and firmware
  • Sensor spoof protection
  • Improved connectivity compatibility
  • Less than half the size of the previous version
  • Secure Over the Air updates for future improvements and features
  • Separate digital and analog power supply circuitry for low noise operation


  • Frequency range: 5-100 Hz
  • Frequency precision: 1 Hz
  • Measurement report rate: 2 Hz
  • Amplitude range: 100 dB – 177 dB
  • ADC Resolution: 24bit
  • Battery capacity: 500mAh
  • Battery charge time: ~2.5h,
  • Battery life with BT connected: ~6h, with BT off/Power Saving: ~10h
  • Bluetooth range: ~10m
  • Power supply: 5V 500mA USB-C reversible connector
  • 12V Adapter: Dual 2.1A USB supply, with 12V and 5V voltmeter and USB current monitor
  • Display: 0.66” Monochrome Graphical OLED
  • Operating temperature: 0-60C
  • Weight: 75 grams
  • Sensor dimensions: 48.6mm x 15.5mm x 93.6mm (without suction cups)


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