Holowon Thermal Wave


This hand-built analog frequency modulator radiates your sound into brass.

Lower frequencies yield a hard cutting square wave tremolo.

Bypassable cut-off control adjusts the time the effect takes to decay into clean signal.


  • Level: Output Signal Volume.
  • Mode: Selects Tremolo/Frequency Modulator Settings.
  • Frequency: Modulator Pitch/Tremolo Speed.
  • Cut-Off: Effect Decay Rate (switches off at minimum).

Most recent forum threads

Where to find one?

your browser doesn't support AJAX?

low frequency oscillator lfo-controlled fx pedal stompbox stomp box guitar effects pedal tremolo trem volume/amplification modulation modulate time-based lfo
Syndicate content

Subscribe to our newsletter

Also check out Effects Database's social media accounts: