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  • Overview
  • Customer Reviews
  • 4.1/5
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Regular Price: $349.00


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Get the legendary tube compressor from Capitol Studios.

Capitol Mastering Compressor gives you the rich sound of the CM5511 — a legendary handbuilt tube mastering compressor designed and used by Capitol Studios on historic catalogs and thousands of hit records. Exclusively modeled by UA, now you can get the same professional finishing touch previously only available at Capitol Studios.

Included Version

UAD Native
Runs on your Mac or PC without UA hardware.

UAD Native plug-ins run on both macOS 10.15 Catalina or newer and Windows 10 and 11. Go to our UA Support page for system requirements.

  • Give your tracks the velvet touch of Capitol's handbuilt mastering compressor, the CM5511
  • Get the pro sonics of the same hardware used on catalogs from Capitol, Blue Note, Motown, Verve, and more
  • Easily increase perceived loudness and texture in your productions with Saturator, Mix, and Headroom controls
  • Tighten your low end and expand your stereo width using simple Mono Fold and Mid/Side features

Want to Try It?

Use this plug-in free for 14 days and find out if it's right for you.

Try it free


Get the Exclusive Sound of Capitol Mastering

Get the Exclusive Sound of Capitol Mastering

The CM5511 compressor has mastered entire catalogs from Capitol, Motown, Geffen, Blue Note, Def Jam, and dozens more, as well as modern records by Black Sabbath, Demi Lovato, and Selena Gomez.* Inspired by vintage Fairchild 670 and Gates Sta‑Level tube limiters — and designed for consistent results across Capitol's four mastering rooms — Capitol Mastering Compressor is an exacting emulation of this "spare no expense" hardware, giving you the modern tube-based sound of this custom-made dynamics masterpiece.

Expanded Controls for Complete In‑The‑Box Mastering

Expanded Controls for Complete In‑The‑Box Mastering

Easily tighten low end, add subtle saturation, and tweak the stereo field with easy‑to‑use "plug‑in only" controls. Plus, comprehensive dBFS and LUFS metering and sidechain filter means you have a full-featured, modern mastering tool at your fingertips.

Add Expensive Sound to your Instrument Groups

Add Expensive Sound to your Instrument Groups

Not just for the 2‑bus, Capitol Mastering Compressor will add its tube‑based magic to your drum bus, synths, background vocals, and more, giving you the gorgeous dynamics control only achievable with this one‑of‑a‑kind, hit‑proven hardware.

*Use of artist names does not constitute official endorsement of Capitol Mastering Compressor software.

Customer Reviews

Capitol Mastering Compressor

Overall Rating


P. Motyczak

July 15, 2024


Beautiful sound. Trying it on different instruments and buses. Wonder why there's only Native version of the plugin....

J. Ross

July 15, 2024

Love love love this!

Color! Life! Glue! I just got this plug-in two weeks ago and I’ve dropped it on every song I’ve done since. Master track, vocal track, drums bus. It’s quite amazing. Tons of presets are really varied in tone, width, depth. Pure magic. Highly recommended.

R. Butler

July 9, 2024

Unique and powerful

Talk about adding color and tone to your mix bus, this really did the trick for me. I can't say I'd use this on everything I'm mixing but this compressor really packs flavor and punch as you'd expect from the name. And UA's additional modifications, like the added Saturation give it fire even the original unit couldn't produce. I'm still getting to know the unit but happy to take the time to learn all it has to offer. Five stars is barely enough.

命. 陈

July 6, 2024

Very good, almost hardware like sound, great, come on UA

Very good, almost hardware like sound, great, come on UA

U. Behboudi

July 2, 2024

Perfect sound

Great for mastering and for use on bus.
Clear result☝

S. Downie

June 21, 2024

Its a FAB compressor for Mastering - Get this !

The sound mix from this compressor is really great and on point. You get good sonics and balance, from deep lows to crisp highs, and an edge that gives it a push. The Capitol sound it brings is interesting too. UA have done a above and beyond plugin.

b. boubacar

June 15, 2024


Good quality mastering dynamic

p. Besnard

June 15, 2024

Capitol mastering compressor :tried is to adopt it

the machine is a fantastic compressor, with numerous settings allowing you to optimize your mixes on a master bus. I love combining it with a massive Manley eq equalizer upstream. Its SHAPE function allows you to add bite to your mixes. An essential element to perfect your mix.

T. Mitrevej

June 15, 2024


Instant magical touch with lots of useful feathers.


June 9, 2024

Amazing Product, but only native?

The sound you get from this thing is great, but it's a little sensitive on the input/headroom, you can't run in too hot, as it'll easily over saturate. Also, it's native only, which seems to have upset everyone who was a customer before UA became native.

M. Stover

May 5, 2024

Stupendous subtle control

IMHO this is a better sub bus glue compressor than the api 2500. It’s great for the mix bus as well of course. Put two, one right after the other to knock off 1-2 db each and you’re sittin pretty. Simply amazing.

K. Kaspersen

April 30, 2024

Need extra little powerful push in your track?

This is the answer, very tubey sound or just a little refinement? this one will help you A LOT!

R. Garewal

April 27, 2024

Game Changer

This is what Ive been looking for. Amazing saturation and sound on master and bus.

M. Ota

April 15, 2024



J. Aguirre

April 4, 2024

Use it on masters for saturation!

I give this 3 stars, would be 5 if there was a Sharc/UAD2 version. Not being able to load it in the UAD console seems like a major oversite, or perhaps lazy on the developers part, so that's why it's 3 stars.

Anyway, the sound of it is AMAZING. I find it super useful for bass and drums if I use it on groups but on a master it does some serious saturation that sounds very clear/thick. Being able to track with it would be nice, I hope UA listens to all of us and makes it available for DSP

j. paredes

March 25, 2024



M. LaVaque

March 21, 2024

Grab it now!

I insert this compressor on my submix bus. I have the saturation button on and that's all I need. I rarely compress with it.

S. Vanderploeg

March 1, 2024

Absolutely Stunning!

Magic. There is not a single thing about this plugin that isn't awesome. If you have a decent mix, you won't need much more than this to put out a polished master. This plugin is quite an accomplishment. I couldn't understand the reviews, but when I read I see that many people are complaining about other issues like subscriptions etc. As far as the plugin goes - 5 stars all the way.

L. Leonard

February 29, 2024

For the analog lovers

Wow,a lot of analog flavor in it
Nice and Smooth.

V. Mina

February 10, 2024

5 Stars for the sound but …

but… Native only, why? Please UA fix this problem for the users like me with tons of cores and Satellite systems.
5 Stars for the sound because is really impressive and the compressor adds a 3Dimensionality that no other software adds. The sense of depth is very pleasant just when you put it into the track and the space between L and R immediately becomes well covered and distributed. It's subtle but very nice to hear. I tried on my 2Bus chain instead of the actual comp I put on before. Just a few dBs in parallel mode and WOW.

Saturator is good but if used with care because it can smash everything.