“The only AKG-licensed emulation of  this one-of-a-kind spring reverb.”

                                      *Universal Audio


Hello friends,

Thank you for checking out our Weekly blog.In this blog I will be discussing UAD’s AKG BX 20 Spring Reverb Plug-in.


Key features

  • Input Select, Mono/Stereo: Changes input between summed mono or stereo
  • Tank Select, A / B / A+B: Under stereo use, changes tank options among stereoized "A" and "B" and original "A+B" configurations
  • Direct, Off / On: Disables/enables the spring tank's naturally occurring direct sound component
  • Low Cut, Off / 80 Hz: 12 dB per octave, 80 Hz filter
  • Bass, ±10: Continuous tone control borrowed from the AKG BX 10, ±8 dB at 150 Hz
  • Treble, ±10: Continuous tone control borrowed from the AKG BX 10 ±4 dB at 5 kHz
  • Dry/Wet, 0 to 100%: Continuously adjusts Dry and Wet signals under insert use case
  • Wet Solo, Off/On: Disables/enables Wet Solo function
  • Predelay, 0 to 250 milliseconds: Continuously adjusts Predelay amount
  • Channel 1 Decay, 2 to 4.5 seconds: Continuously adjusts Channel 1 Decay time
  • Channel 2 Decay, 2 to 4.5 seconds: Continuously adjusts Channel 2 Decay time
  • Channel 1 Volume, ∞ to +24 dB: Continuously adjusts Channel 1 Volume
  • Channel 2 Volume, ∞ to +24 dB: Continuously adjusts Channel 2 Volume
  • Channel 1 Pan, ±100: Continuously adjusts Channel 1 Pan
  • Channel 2 Pan, ±100: Continuously adjusts Channel 2 Pan
  • Link, Unlinks/Link: Unlinks/Links Decay, Volume and Pan parameters
  • Mix: Continuously blends processed and unprocessed signal
  • Power, Off/On: Disables/Enables plug-in (all DSP processing is bypassed)

Universal Audio



    • Mix with the only licensed and endorsed AKG Acoustics BX 20 reverb plug-in
    • Envelop instruments in dark, dense, clear ambience with original dual spring tank configuration
    • Harness new "plug-in only" features like stereoized A/B Tank Select, Direct signal defeat, and BX 10 Tone controls
    • Mix with artist presets from Patrick Carney (The Black Keys), Vance Powell (Jack White), and Jacquire King (Kings of Leon)

    Universal Audio


      Universal Audio does it again

      Produced in the late 1960s, The AKG BX20 reverberation unit was, has been one of the most popular spring reverb units ever made. Known for its lush and warm sounding plates, the BX20 was often used for Vocals and Guitars, electric guitars for the most part. The unit sits in a huge wooden box.



      I would say the best way to compare this to some thing would be to say this is an analog reverb versus our digital reverb. Used to be the only single reverb most studios we have back in the 1970’s. Again, because of its size, they are difficult to transport.

      For those of you who would like to hear how it sounds, the BX20 can be heard on Kings of Leon, Black Keys, and Jack White records.            


      Links of interest




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