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 MJUC jr. by Klanghelm is a Virtual Effect Audio Plugin for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
MJUC jr.
Product MJUC jr.
Developer Klanghelm
Price (MSRP)
Type / Tags Variable-Tube CompressorCompressorVariable-Mu
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
Downloads Released
System Requirements
Windows 7 SP1
Downloads Released
System Requirements
OS X 10.9 or higher
Miscellaneous Information
Copy ProtectionNone

MJUC jr. is the little brother of the colorful MJUC.

It's a variable-mu design with lots of vibe. capable of smooth leveling but also heavy pumping effects. With its two gain stages and interstage transformer simulation it offers a very deep and lively soundstage.
The three-position timing switch not only controls the attack and release times of the unit, but also the slew rate of the transformers and the timing of the other parts of the circuitry, that are directly influencing the generated harmonics (saturation).

MJUC jr. is a mix of Mk1 and Mk2 of its big brother MJUC. It's combining very natural, dense compression characteristics of the early days of this type of compression with a more forward sounding approach and more harmonics creating of the variable-mu comps of the early 1960s.

MJUC jr. is freeware.

Latest User Reviews Average user rating of 4.50 from 4 reviews

Reviewed By puff70
June 28, 2020

nice looking and great working tool ...............................................................................................................

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Reviewed By nonewwavenofun
March 8, 2020

Nice-looking interface and easy to use, but I prefer their DC1A compressor. Similar idea (two knobs, a couple of modes), but feels more intuitive to me. I'd say stick with the one you prefer - you don't need both.

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Reviewed By juliandoe
January 11, 2020

Super intuitive and simple to use the MJUC jr is a Vari-Mu compressor that everyone should have in their arsenal. Even if it's limited in his functions this compressor is useful in several situations. I love it with the fast setting on snares, it's also gentle and precise on vocals and acoustic instruments. I also use it when I want to add a little bit of compression to a channel strip, an amp or to another compressor, in fact, it's one of my two compressors in my "sandwich" technique (comp-eq-comp). The only way I don't use this compressor is on overheads, group of instruments, reverbs, mix bus, sub-mixes, parallel compression. I feel that with multiple sounds it starts to sound unpleasant to me and shows the limitations of the free version. That's why I'm going to buy the full version, that, by the way, has a ridiculously low price for what it does. This is a MUST HAVE. No doubt, click download and you won't regret it.

Julian Doe.

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Reviewed By Bady89
January 11, 2020

Easy to Download.

Exe installer, i hate exe installer, for what ?? Just give the dll, but ok it was worth it.

Creates a nice dense, pumping sound.

I like the GUI, looks like a Fairchild Compressor.

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Discussion: Active
12 October 2019 at 10:09am

It's not a new things, it's free since 2015, the last version is 07/30/15 - version 1.0.1. And it's not 64-bits...

4 December 2019 at 6:53pm

Please Mr. Frenzel, back (also) to 32-bit...

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MJUC jr.

Average user rating of 4.50 from 4 reviews

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