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  • Overview
  • Features
  • Customer Reviews
  • 4.9/5

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A startling recreation of the world's finest echo chambers.

Located below the iconic Capitol Tower in Los Angeles, Capitol Studios is arguably the most recognized studio in the world — and much of its legend can be traced to its hallowed, subterranean echo chambers. From Ray Charles to Frank Sinatra, Beck to Muse, these underground spaces continue to provide gorgeous hi-fi ambience that is simply unmatched.

Now, after years of R&D and close collaboration with Capitol Studios — including unprecedented access to four legendary echo chambers 30-feet beneath the studio — Universal Audio proudly presents the Capitol Chambers plug-in, a startling end-to-end recreation of the most popular echo chambers ever created, exclusively for UAD hardware and UA Audio Interfaces.

Record and mix with the world's only authentic plug-in emulation of Capitol Studios' prized underground echo chambers

Add the unmistakably dense, natural reverberation to vocals or drums — far beyond plate, digital, or simple convolution reverb

Create new sounds by repositioning Capitol Chambers' microphones using UA's Dynamic Room Modeling

Audition current and historical chamber configurations, plus new setups curated by Capitol's Steve Genewick

Harness the chamber's entire signal chain including amplifiers, speakers, custom preamps, and mics

Quickly pull up presets from legendary Grammy-winning engineers Al Schmitt (Ray Charles, Steely Dan), Darrell Thorp (Beck, Radiohead), Frank Filipetti (Madonna, Paul McCartney) and more

Take a Listen

Take a Listen
Classic Echo Chambers Designed by Les Paul

Classic Echo Chambers Designed by Les Paul

Prized for their natural sound and dense ambience, acoustic echo chambers became a creative tool for pioneering, forward-thinking engineers by the mid 1940s — most notably UA founder Bill Putnam Sr. and the great Les Paul, the genius behind the Capitol chambers designs. Built from reinforced concrete and tuned using sloped ceilings and a trapezoidal shape, Paul's designs deliver a smooth, balanced decay and a completely natural room tone that can't be achieved in any other way.

Capturing Iconic Echo

Capturing Iconic Echo

In creating this amazing plug-in, UA sourced historic technical diagrams from the early '60s to precisely recreate microphone/speaker setups inside of Capitol's most coveted chambers, including the vintage omnidirectional Altec 21D mics and custom speaker/horn configurations, in their original hit-making positions. Current "modern" configurations dating from the late '80s were also captured, using the omnidirectional Shure SM80s, while new and creative mic/speaker combos were devised by Capitol's resident chamber expert, Steve Genewick.

Unprecedented Ambience Control

Unprecedented Ambience Control

Capitol Chambers' Position slider gives you next-level control over spatial and time response, allowing you to reposition the chamber mics — no assistant engineer required. From the maximum distance stock positions, to direct speaker-to-microphone effects and proximity characteristics, the Capitol Chambers plug-in can subtly thicken vocals or drums, or soak strings with the most natural, complex sounding reverb ever recorded.

Powered by UA's Dynamic Room Modeling

Powered by UA's Dynamic Room Modeling

Harnessing the same technology as the award-winning Ocean Way Studios plug-in, Capitol Chambers uses UA’s proprietary Dynamic Room Modeling technology, an exclusive combination of physical modeling and advanced measurement techniques. Whereas standard convolution reverbs only provide a sonic snapshot, Dynamic Room Modeling gives the Capitol Chambers plug-in nearly infinite ambient possibilities.

Deeper Still

Deeper Still

Beyond a vintage recreation, the Capitol Chambers plug-in offers creative features for modern DAW workflows like Pre Delay, Dry/Wet mix, and Decay controls. A sweepable 80 to 750 Hz filter lets you minimize muddy bass going into the chamber, while Bass, Treble, and proportional Q Mid band lets you perfectly season the chamber's lush ambience. In addition, the Width control allows you to narrow the chamber's stereo field, for easily pinpointing a vocal or instrument in the mix. Finally, Decay lets you quickly shorten Capitol Chambers' natural reverb time, offering more scenarios to harness the most famous echo chambers ever made.

An All-Star Collection of Artist Presets

An All-Star Collection of Artist Presets

The Capitol Chamber's plug-in features carefully crafted presets from a stunning roster of Grammy-winning engineers and producers. From recording industry icon Al Schmitt (Ray Charles, Steely Dan) to Mark Linett (The Beach Boys, Los Lobos) and Frank Filipetti (Madonna, Paul McCartney), Darrell Thorp (Beck, Radiohead), and more, you can experiment using the same settings that professionals who know every nook and cranny of Capitol's famous chambers use every day.

Capitol and the Capitol logos are trademarks of Capitol Records, LLC, registered in the United States, European Union, and other jurisdictions, and are used under license.
"A Rose" by Jamie Lidell
"A Rose" by Jamie Lidell

"A Rose" by Jamie Lidell

Written and recorded exclusively to showcase the UAD Capitol Chambers Reverb plug‑in.

Key Features

Exclusive echo chamber emulation licensed and endorsed by Capitol Studios

The world's best-sounding and most in-demand echo chambers, designed by Les Paul

Gorgeously natural, uniquely dense chamber ambience, for reverb buses or individual sources

Choose from Capitol’s most popular chambers (2,4,6,7) with varying mic/speaker configurations representing modern to historical setups

Captures amplifier, speaker, custom preamp, and microphone chain for unprecedented realism

Fine tune ideal placement with continuously adjustable microphone positioning using UA's Dynamic Room Modeling

Other features include adjustable Decay, Pre Delay, sweepable cut filter, three-band EQ, Dry/Wet mix, and Width

Artist presets from Grammy-winning engineers Al Schmitt (Ray Charles, Steely Dan), Darrell Thorp (Beck, Radiohead), Frank Filipetti (Madonna, Paul McCartney), and more

Customer Reviews

Capitol Chambers

Overall Rating


D. George

September 4, 2023

Exquisite. Expressive. Exceptional.

Look no further: This Is It.

D. Siemssen

August 25, 2023


Just perfect.

J. Ross

July 24, 2023

Lush. Vibrant. Eternal.

Maybe it’s my imagination but I do feel like I’m forty feet beneath the Capitol Tower in Hollywood and the voice of Frank Sinatra is reverberating in my headphones. This is a near-magical plug-in. Soulful. Highly recommended.

J. Ross

July 24, 2023

Lush. Vibrant. Eternal.

Maybe it’s my imagination but I do feel like I’m forty feet beneath the Capitol Tower in Hollywood and the voice of Frank Sinatra is reverberating in my headphones. This is a near-magical plug-in. Soulful. Highly recommended.

A. Sanchez

July 7, 2023

Clean and big sounding

Clean and big sounding

J. Mateo

June 28, 2023


This is such a smooth rich sounding reverb. I love plate reverbs and found this to be the perfect partner to my go to plate reverb. you can't go wrong with this

A. Lee

June 24, 2023

The Best so far

I resisting wanting to love this as I have the Lexicon 480L, Ocean Way, Hiitsville chambers, EMT 140, & Lexicon 224 - surely that's enough! But once I'd tested Capitol chambers, there was no going back. Of course, different reverbs for different sources and circumstances BUT this is the most expensive sounding of all.

G. Funes

June 16, 2023

A dream come true

The sound of this plugin is really amazing, with a very friendly interface, easy to get to "that" Capitol sound. The Capitol studio reverb chambers is one of the most distinctive reverbs in the world and this plugin recreates it perfectly.

A. Toit

June 7, 2023

Uses to much DSP

Cant use with UA Arrow. Useless plugin.

R. Evans

May 24, 2023

Sounds expensive

Great reverb, on any source or on the whole mix. Makes everything sound expensive even though you recorded it all with a sm57.

R. Evans

May 24, 2023

Sounds expensive

Great reverb, on any source or on the whole mix. Makes everything sound expensive even though you recorded it all with a sm57.

T. Martens

April 26, 2023

Best natural Room plug-in I own!

This plugin is my new go-to room fx. I prefer to start with the Genewick piano room preset, before I start sculpting the sound. Very nice to have in my FX-toolbox!

D. Dionne

April 11, 2023

A definite must

Capitol Chambers Reverb brings life and space to your mix. Its multiple classic mics combinations and room settings are truly impressive.

A. Lind

April 5, 2023

Just right and got deal!

So I got this on sale at 174 PLUS a 50 coupon so for that price I couldn't resist. I immediately put it on a snare and it was beautiful! I've been in the UAD eco system for sometime now and have 12 UAD cores. Since use a mix of plugins incl ST console one which I love and other brands mixed with UAD so I rarely max out the UAD stuff anymore on a 7 yr old 4 core i7 so. UAD CPU isn't an issue for me really. I love this thing

Y. Lee

March 28, 2023

성능과 DSP사용량이 비례한다

너무나 자연스럽고 아름다운 리버브사운드를 내주지만 DSP사용량도 그만큼 사악하다. 하지만 어쿠스틱 사운드의 보컬에는 이만큼 좋은 리버브가 없다. 지금도 내 최애 리버브 중 하나.


March 16, 2023


Great chamber room plugin. I love it very much!

M. Racanelli

February 26, 2023

Best Reverb

Uses higher DSP but the effect this has on tracks is fantastic. IMO best reverb available.

s. H

February 4, 2023

continuous issues

Terrible consistancy with this plug in. And UA definitely know about it. My DSP is on 41% on 8 a core and it is disabling this plug in in particular and hitsville chambers upon loading sessions. Even when I reload it does exactly the same thing. Thousands of dollars spent to run this software that works 15% of the time. Won't even let me take it off and then remount the plug in most of the time just so I can have a user preset saved for every session. Absolute joke. NOT USER ERROR. An obvious bug in the plug in. they won't fix it so not sure why I'm wasting my time with this.

H. Fivelsdal

January 25, 2023

You Need This!

Great for vocals. I love the Al Schmitt preset.

M. Ferreira

January 19, 2023

Great Reverb!

Amazing reverb, but it takes alot of DSP.