stute.x1A Audio Analyzer

Precise electrical & acoustical measurement

Application samples

Optimize your loudspeaker box sound
Find the best speaker driver for your project
Check the audio crossover behavior
Test your impedance EQ-circuit
Verify the bass reflex port
Test your audio amplifier
Check the tone/equalizer control
Analyze the signal distortion (k2..k7)

How It Works

Step 1

Hardware: Connect your USB audio interface to your PC. Prepare the small measuring adapter stute.x1S (free schematic).

Step 2

Software: Install and configure the stute.x1A Audio Analyzer software.

Step 3

Ready, start with your measurements.

Key features

Frequency range
Wide Frequency range up to 47kHz
Usage of a standard USB audio interface (ASIO/WDM driver) 
high repeat accuracy for electrical & acoustical measurement
User interface
User & touch-screen friendly Design. No overloaded screens.
Multi-channel measurement and powerful xy screen 
Microphone correction included
Audio signal source
Audio signal generator included
SPL measurement
SPL correct acoustical measurement supported

Main screen

XY screen

measurement Example

Amplifier tone control

Check the frequency response of the amplifier or the tone control settings.

measurement Example

Acoustical frequency response 

Measure the frequency response of a loudspeaker driver or from the complete loudspeaker box.

measurement Example

Audio crossover check

Verify the cutoff frequencies or the filter slope or check the driver impedance influence to the filter characteristic.

measurement Example

Driver impedance Z

Measure and compare the impedance chart to the chart from the manufacturer speaker data sheet. Deviations are an indicator for changed THS parameter. Or test the audio filter "Z EQ circuit" from your audio crossover.  Or check the bass reflex tuning or...

measurement Example


Execute a FFT to display the spectrum of an electrical or acoustical signal. Measure signal distortions k2..k7.


System requirements

PC with MS-Windows 7, 8, 10 (32 & 64 bit). Processor i3 1.5GHz or above, screen resolution min. 1024x768 pixel.

Audio interface with headphone output, stereo line input and microphone input.  Level of inputs and outputs adjustable. Supported driver ASIO and Windows WDM.  Sample rate 44.1kHz, 48kHz, 96kHz. Recommendation Focusrite 2i2 or Behringer UMC202HD. 

Microphone for acoustical measurement, like Behringer ECM 8000.

Simple interface for electrical / Z measurement (stute.x1S, see download page).

stute.x1A bundle

For your quick start!

The stute.x1A BUNDLE  includes the software stute.x1A, a high resolution USB audio interface, a measurement microphone with XLR cable and the stute.x1S PCBA adapter. 

stute.x1S INterface

Simple measurement interface

You need for the complete system adjustment and some electrical measurements the simple interface stute.x1S. For the construction by your own you get schematic for free at the download page. 

In our web shop you get the PCB, PCBA (PCB incl.components) or KIT (PCBA + case + front panels). PCBA and KIT are delivered as an assembly.