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Exponential Audio R4 Reverb Plugin

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Quick Overview

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Classic character reverbs for music

Craft the perfect spatial effects for your music productions with R4. Use detailed, creative controls to add personality and space to your music—without ever compromising clarity.


Rich, character-filled reflections bring unique color to your music

Your music production deserves a reverb tone as unique as the music itself. R4 employs a reverb algorithm designed to color and compliment stereo music productions, making the reflections themselves a musical element. With a comprehensive and precise control set, R4 has everything you need to put the final polish on your next music project, no matter the genre.


Creative freedom over distinct reverb tone

Give your reverb some character

R4’s rich, musical reverb algorithm introduces more movement to the reverb tail, producing unique, expressive reflections like chorused guitar textures, dark rooms, vibrant vocal halls, and more.


Get creative with modulation and dynamics effects

Use the Chorus module in R4 to create different textural effects, or the input-driven Gate to dictate exactly where and when your reverb is most prominent.


Spatial reflections you’ve never heard before

R4’s preset bank blends classic plate, room, chamber, and hall reflections with tail modulations to create exciting, dimension expanding spatial effects.


Key Features

Lush stereo reverb algorithm
Chorus and Gate modules for musical effects
Dynamic tail suppression to lower reverb in louder parts of a mix
Over 1,200 presets
Create ambient drones and texture with Freeze


"Exponential reverbs have been an indispensable part of my recent journey. As a self proclaim reverb connoisseur with an army of hardware reverbs in my studio, Exponential's NIMBUS and R4 reverbs are the only ones holding a candle to the outboard sounds I've gotten so used to over the years."

Richard Furch

Mix Engineer for Outkast, Prince, and Usher


System Requirements


Operating Systems

Mac: OS X 10.5 Mountain Lion - macOS 10.15 Catalina
PC: Win 7 - Win 10


Hardware Requirements

CPU: Multicore processor, 2 GHz or greater
RAM: 4 GB or greater
Display: 1440 x 900 or greater


Plug-in Formats

AAX, AU, VST, VST3 (all formats 64-bit only)


Channel Formats

Mono, Stereo



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