Product: Ultramarine4
Developer: Acustica Audio
Price (MSRP): 299.00€ - Early-access* pricing: 119.00€ [60% OFF] - FREE update for current ULTRAMARINE users.
Plug-in Format(s): VST, AU, AAX
System Requirements (Windows): Windows 7 - Windows 10
System Requirements (OSX): OSX 10.8 - OSX 10.13
Ultramarine4 Commercial web-page:
Ultramarine4 User's manual:

*Early-access / Crazy-access pricings are introductory, time-limited discount periods during which the plugin maybe subject to further refinements and minor updates, for better performance and extended compatibility. All updates and bugfixes will be available inside Aquarius under the 'Updates' section.

With a full channel-strip, 2 equalisers, the Holy Grail of compressors and an astounding reverb, you can now have a truly esoteric collection of studio gear right inside your DAW. Covering everything from tonal shaping to dynamic control and ambience, Ultramarine4 is the most comprehensive suite of its kind.



A-70 Mid-Side Stereo Compressor

Ultramarine4's compressor is based on what is arguably the most iconic of all dynamics processors. Rightfully described as the "World Accepted Standard For Level Control" in the '50s, it is today one of the most revered studio processors ever. The original machine can cost up to $20,000 or more on the second-hand market - for one in good condition - and the extra costs of maintenance should also be taken into account. The sound of this impressive machine is defined by its short attack response and long release times, letting you keep transients under control and yet giving the body of the track a sweet massage.
Equally at home in audio mastering studios as well as radio broadcast facilities, only about 1000 of them were sold and they are getting harder find in a good operating condition.
Over the years, many clones and emulations - both hardware and software - have been created striving to perfectly capture the unmistakable character of this behemoth comp/limiter. And many of them certainly sound good. But we think that no approach can beat the actual sampling of the unit in order to match the sonic elegance of such a marvellous piece of engineering.


A-27 - Variable Tube Equalizer

Originally built in the 60s - this active EQ had some pretty unusual circuitry, a completely different electronic implementation compared to other classic EQ's from those days. The search for an original unit seemed like an impossible mission, but we didn't lose heart, despite these difficulties and after we got hold of all the needed components - we decided to assemble one ourselves. This beast turned out to be wonderfully smooth, and we can say without a doubt that the Ultramarine4 A-27 EQ is completely different from any of the EQ's you will find in the Acustica domain so far.

A-64 - American vintage 2-band Passive Program EQ

Don't let its size fool you. This small passive EQ comes straight from the early 1960s - with just two correction bands, a shelving low filter and a high peak type filter. Whilst the low-frequency filter has a fixed cut-off frequency of 80Hz, the high-frequency filter has 5 peak settings ranging from 4 to 15 kHz. Being a passive equaliser, the original model had an input signal attenuation of 17 dB, so for this reason the unit was almost always coupled to a preamplifier or a compressor to recover part of the lost level. It is still considered by many to be one of the most musical equalisers ever. We were lucky enough to find a unit in perfect condition, so we couldn't miss the opportunity to sample it. The result is simply stunning!



The A-58 reverb is the virtual counterpart of a high-quality, electro-mechanical reverberation device - certainly one of the best vintage reverbs ever built by a legendary American manufacturer and designed to enhance broadcast and studio sound. This gem is a real collector's item. It uses 6 electro-mechanical delay lines, each tuned differently, to produce a natural reverberant effect that is extremely smooth and warm sounding, even on percussive sounds. And on vocals, pure magic happens. We think this unit is as good as it can possibly get in the reverb domain. We were able to harness the behaviour of this ultra-rare unit to provide you with the same, exact sound of the original reverb, which inherently possesses the quality of a great reverb chamber.


-Ultramarine4 A-70 (standalone Mid-Side Stereo Compressor)

-Ultramarine4 A-27 EQ (standalone Variable Tube Equalizer)

-Ultramarine4 A-64 EQ (standalone 3-Band Passive Equalizer)

-Ultramarine4 A-58 Reverb (standalone Reverb module)

Ultramarine4 Channel-strip (Channel strip that includes some of the previous cited standalone plugins)

Ultramarine4 suite is based on our Core 13 engine:

-NEW: Our new Core 13 engine improves on the previous version by introducing our new VLA™ technology (Vector Loading Acceleration), which makes the response of the plugin much faster.
-Upgraded SASM (Symmetric & Asymmetric Saturation Modeling) high-performance saturation algorithm;
-Introduction of a new post-production sample de-noising tech for cleaner deconvolved impulses called STT (Super transient technology);
-Full compatibility with Client/Server architecture integrated by default in Acqua plugins;
-Engine optimization introducing a new highly efficient algorithm. This innovative technique is applied to all the deconvolved impulses for further de-noise processing and subsequent elimination of any incorrect low-level behavior (including the so-called "echo bug").

Product authorization and de-authorization is an on-line automatic process that creates a product license based on your computer’s identification code. This procedure is automatically guaranteed by our Aquarius brand new application.
Its purpose is to simplify and automate the authorization, installation and uninstallation process of your purchased Acustica products (ACQUA plug-ins etc.).


-Create a user account (if you do not have one yet) on our website
-Download and Install Aquarius, our products manager, for either Mac or PC
-Log in to Aquarius using your user email and password
-Type the product name in the 'search' field inside Aquarius to find the '(trial)' version of the product, then click on the thumbnail or on the 'Install' button. This will take you to the product page (the trial version of a product is also visible in the 'related products' section on the right)
-Select the right plugin format according to the DAW you are using and click 'Install'
-Aquarius will download, install,and authorise the trial product automatically
-Run your DAW. You're set!


-The old trial authorisation method - which required the 'LASTTRIALS' code - is now obsolete and each trial version of a product can be easily downloaded/installed directly from Aquarius, for a more streamlined process
-Should you see an authorisation error, the reason could be that the product has been already authorised too many times and the limit has been reached

For details about installation/authorization please refer to the following page: Acustica Audio - Professional Audio Software - Acustica Audio