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The Nixielyzer is an analog audio spectrum analyzer, based around the BA3830S analyzer chip. It offers 6 selective audio bands: 63 Hz, 150 Hz, 330 Hz, 1 kHz, 3.3 kHz, 10 kHz and 1 channel for full audio band display.

The Nixielyzer operates with 7 x IN-13 Nixie tubes and offers stereo line in- and output (for easy daisy chaining the device within an existing audio path) with level control incl. selection of the displayed channel (right, both, left), build in microphone with an audio mixer to add the microphone signal to the display or for using the Nixielyzer as a "stand alone" device when no audio source is connected. In addition true electronic symmetrical 2 x 1/4" stereo TRS jack inputs are added. The RGB colour and brightness scale illumination can be adjusted according to your favourite colour.

A big challence was to power the Nixielyzer only from a 5 V USB power supply. Therefore the "ultra cool" HV converter design from my Nixie clocks has been used in a modified circuity. So it is possible to power up the Nixielyzer from a simple USB 1 A loader or with a Y power splitter cable (the same as most external DVD drives will use) from two USB ports of your computer.

You'll get - except of the IN-13 tubes and power supply, which is offered separate - a fully inclusive kit incl. all necessary electronical and mechanical parts (enclosure and scale) to build and power-up the device within a few hours of your evening time.

The Nixielyzer is an analogue design and uses no processor or FFT; so the display is fully in realtime.


  • 5 V 1 A USB power supply
  • No self generated heat
  • Brightness- and colour adjustable scale illumination.
  • Stereo RCA in- and outputs for easy daisy chaining in an existing audio path.
  • True electronic symmetrical 1/4 TRS inputs as an alternative; if in use the RCA inputs are disabled.
  • Selectable audio channel (right / both / left) for display.
  • Build-in microphone signal can be mixed.
  • 63 Hz, 150 Hz, 330 Hz, 1 kHz, 3.3 kHz, 10 kHz and full audio spectrum level are displayed.
  • Solid anodized Aluminium side profiles
  • Mirrored acrylic top cover

What you'll need:

  • 4 hour of your evening time with no hurry
  • A clear, well-lit area in which to work
  • Soldering station and fine electronic solder
  • Multimeter to check the generated voltages
  • Electronic tools
  • A loupe may be helpful
  • TX8/10 (Torx) and PH1 screwdriver
  • Download of the manual
  • Enjoyment of your work of course
  • 7 x IN-13 tubes (offered separately)
  • USB power supply or Y power splitter cable (offered separately)
  • A line audio source or simply use the build in microphone

Dimensions: 223 x 116 x 195 mm incl. tubes
Weight: 735 gr


Complete electronic kit incl enclosure

Version / Shipping to

MiniUSB power supply / cable

Mains plug
Shipping costs
Flat shipping costs of 6.50 or 7.50 EUR are added to cart
The prices of the EU versions includes the German 19% VAT.
Handling fees
Higher handling costs for export are already included in the item price exept of import duties, taxes etc. These charges are the buyer's responsibility.
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