AKG® BX 20 Spring Reverb
The only AKG-licensed emulation of this one-of-a-kind spring reverb.
Introduced in the late 1960s, the AKG BX 20 reverb was a high-water mark for AKG’s esteemed engineers. An ingenious assembly of mechanical and electronic componentry, the BX 20 offered the glorious depth and color of spring reverb without any of the limitations.
The AKG BX 20 Spring Reverb plug-in for UAD-2 hardware and Apollo interfaces is exclusively endorsed by AKG Acoustics, Austria and envelops your sources in gorgeously dark, dense ambience that only spring reverb can provide.
Now You Can:
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)
Take a Listen
5-Minute UAD Tips
Featuring the AKG BX 20 Spring Reverb.
The AKG BX 20's utterly unique character makes it a versatile tool for ambience as well as tone shaping. Its sonic personality features the quick onset of a classic plate reverb, and also the natural-sounding density and diffusion of a chamber — with little of the flutter or “boing” artifacts common with other spring reverbs. Unlike other spring reverb emulations, Universal Audio's hybrid delay network/convolution design provides the only plug-in representation of this mechanically controllable, acoustic ambience system. To that end, UA obsessively emulated a “golden unit” BX 20 from legendary producer, Jon Brion.
The BX 20 plug-in expertly captures the hardware’s unique two-stage decay. This yields warm, organic sounds whether it’s applied on percussion, vocals, or guitars, adding a unique timbre that can make individual tracks stand out — or melt away — in your mix. Short textures are chock full of colorful depth and dimension, while longer decays are rife with lush three-dimensionality, while never washing out.
New Features, More Control
The BX 20 plug-in provides the complete sound and features of the original, plus new "Mk II" features for an expanded sound palette. Tank Select provides the exact sound of the original A/B dual tank system, but includes a “stereoized” tank A or tank B, for more balanced stereo imaging. The Direct function allows you to mute the tank's direct signal for more control and minimizing conflict with the source audio — perfect for buses. The Baxandall-type tone controls — borrowed from the smaller AKG BX 10 — offers the last bit of seasoning to tailor your reverbs.
“When I heard UA was emulating the AKG BX 20, I dared them to beat my hardware – they did it.”
– Vance Powell (Jack White, The Dead Weather, The Raconteurs)
“This is the vocal reverb sound I’ve had in my head for over 20 years. I will never mix without it again.”
– Jeff Juliano (John Mayer, Shinedown, Train)
“I used the UAD AKG BX 20 plug-in during editing sessions for the new Missy Elliott single, "Where They From," produced by Pharrell. The tone instantly cut through on the vocals and percussion.”
– Mike Larson (Pharrell Williams, Daft Punk, Snoop Dogg)
“The AKG BX 20 Spring Reverb plug-in fits into tracks in fantastically unexpected ways.”
– John Paterno (Robbie Williams, Badly Drawn Boy, Bonnie Raitt)
“What a fat sounding, vibey reverb — I've been using it on everything! Its maiden voyage was mixing a couple Don Henley tracks.”
– Jeff Balding (Taylor Swift, The Eagles, Florida Georgia Line)
Watch The Reviews
June 17, 2020
Amazing! Ignore the word 'spring' and listen to it, cause it's just great.
Great reverb for a bunch of different sources and uses. Beautiful ambience and 'room' sound. Don't be fooled by the word 'spring' and assume it's only for guitar. This is definitely one of...Read More
May 29, 2020
You can't not make this thing sound beautifulRead More
May 23, 2020
True vibeRead More
May 15, 2020
One of the only springs reverbs I actually like and have used on vocals.Read More
May 12, 2020
I love the response and the ease you can edit. It does use a lot of processing power. Still worth itRead More
May 11, 2020
I`ve been using different real spring reverbs for years, they all have in common some nice density and “real vibe”. Uad BX 20 keeps that feeling to me, plus lots of flexibility....Read More
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)
AKG BX 20 Spring Reverb
Amazing! Ignore the word 'spring' and listen to it, cause it's just great.
Great reverb for a bunch of different sources and uses. Beautiful ambience and 'room' sound. Don't be fooled by the word 'spring' and assume it's only for guitar. This is definitely one of the greatest in-the-box reverb units. Well done, UA.
You can't not make this thing sound beautiful
One of the only springs reverbs I actually like and have used on vocals.
I love the response and the ease you can edit. It does use a lot of processing power. Still worth it
I`ve been using different real spring reverbs for years, they all have in common some nice density and “real vibe”. Uad BX 20 keeps that feeling to me, plus lots of flexibility. Couldn`t be happier with it!
Beautiful dual-spring without the "sproing"
Brilliant, lush, massiveness. Is that a word? It's a sound. Use it on everything.
Dive In the Room
Nice warm reverb. Organic room designing especially ducked by the kickdrum ;)
But not usable for al purposes...
Dark and lush
This is a must if you want dark reverb that fills all the wholes in a mix!
I’m totally impressed with just how great this plug-in sounds. One thing about UA plug-ins...once you get one, you want to collect them all!
Best reverb for my mix
Amazing quality and great presets.
UAD makes the best Reverb
I am impressed by the rich and smooth sound of this reverb
UA delivers amazing quality and superb sound! One of the best spring reverbs!
Insanely lush and rich spring reverb. Amazing on guitar and vocals. It’s a dsp gig for sure though. Worth it.
Great Presets ! No need for much tweaking to dial in a perfect sound.
But keep in mind that tweaking this box is lots of fun !
A little different from the others
I really love this kind of reverb, proper analog feeling
Another great reverb from UA. I have never owned the hardware to this or any of the UA plugins that I’ve purchased from UA but what a thrill it is to have such quality at my fingertips in my home. Thanks UA
Happy to Have this Reverb
Thanks to me that I purchased this reverb. Endless things can be done and the sound!! Ah!!!! just toooo good!!!
Sounds just like my BX 20. Incredible
A. de David-Beauregard
Excellent reverb but hold up
Now listen, this thing sounds great no doubt, but only in VERY specific scenarios.