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Synth (Hybrid) Plugin by reFX
Nexus Nexus Nexus
Nexus by reFX is a Virtual Instrument Audio Plugin for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
Copy Protection
Online Activation (Challenge / Response)
My KVR - Groups, Versions, & More
466 KVR members have added Nexus to 34 My KVR groups 596 times.
Not In Your MY KVR Groups
(or group limitation prevents versioning)
+27 in private groups

KVR Rank

Overall: 41   35   41

30-Day: 38; 7-Day: 34; Yesterday: 37

Nexus is a next generation ROM synthesizer. Nexus delivers complex, ultra-fat, contemporary soundstorms. A powerful and flexible architecture is the foundation that supports the immediately useful and spontaneously engaging design of the instrument. Every aspect of Nexus was built to produce music of the highest quality, quickly, with the least amount of fuss.

New in Nexus 4

Advanced Librarian:

  • We have added some really cool features and quality-of-life improvements to the already amazing librarian in NEXUS4.
  • Featuring three columns for easy navigation.
  • Counters for folders, categories, and presets to give you an overview at a glance.
  • Color-coded tags, bookmarks, favorites, and a dedicated location for user presets.
  • History function: Easily go back a step (or two, or three, or more) - and forth again if and when needed.
  • Quickly find what you're looking for with instant sound preview, search-while-you-type, filter by category and tags, and so much more.

Arpeggiator Deluxe:

  • Access all sixteen layer arpeggiators, in addition to the main arpeggiator.
  • Never lose track of what's happening with the fully interactive, zoomed-out overview at the top.
  • When zoomed in, the new "follow" option always scrolls with the playback.
  • Extend the pattern length up to 256 steps and play the most complex patterns you can come up with.
  • Sequencer mode: Create the most complex patterns with multiple notes per step and set the velocity individually. Zoom in on the x-axis or the y-axis to make fine adjustments or zoom out to have an overview of the full pattern.
  • Editing has never been so comfortable. This is the best Arpeggiator you can find on the market.


  • Full visualization of the signal-flow for real-time feedback:
  • You see what you hear and you hear what you see.
  • Five insert effects, four equalizers, filter, reverb, delay, and impulse. Color-coded for navigating incredibly fast.
  • Now featuring an incredible glitch effect and the brand-new OTT compressor.
  • Effects can be rearranged by drag'n'drop and the entire FX chain can be saved and loaded.
  • All on one page. No clicking back and forth countless times to get to the desired result.


  • Clean and comprehensible visualization of the signal-flow per layer. Easily pinpoint what affects the sounds.
  • Enable or disable entire layers with one click or play around with individual effects and oscillators.
  • Easily adjust the level, panning, and tuning of the oscillators.
  • This enables you to split complex SQ sequences into their components and single out individual sounds (just the bass, for instance) to easily create your own melodies.


  • Vector-Based GUI:
    • Sharp and crisp. Always. Resize to what is convenient for you.
    • No matter the resolution of your screen, NEXUS4 always looks good.
  • Easy Macros, Easy Modulation:
    • Four quick-access macro controls and a total of 20 modulation slots.
    • Convenient and easy to use.
  • Improved Cloud-Sync Feature:
    • Automatically store your favorites, bookmarks, user presets, and settings in the cloud.
    • Getting back your content when installing NEXUS4 on a new computer has never been easier.
  • Fast, Easy on the Resources:
    • NEXUS has never been faster and better.
    • Preset loading times and CPU performance have been vastly improved.
  • Compatible with NEXUS2 and NEXUS3:
    • NEXUS4 is compatible with your existing NEXUS2 and NEXUS3 libraries. Load your old beats into your DAW and load the sounds you've had before.
    • Upgrading has never been smoother.
  • More Sounds:
    • NEXUS4 expands the factory content by more than 260 new, high-quality, hand-crafted presets.
    • Because one can never have too many sounds.
  • Online Activation:
    • Yes, we've heard you. No more dongles or other third-party tools required.
    • Activate NEXUS4 online - it'll only take a few seconds and you're good to go.
  • ReFX Cloud App:
    • Installing NEXUS4 and any expansions is easy.
    • Click the icon of the product you'd like to install. Done.


  • Electronic documentation (online).
  • 2,799 sound-presets divided into 22 categories.
  • 2,238 multi-samples (~18 GB uncompressed).
  • 211 impulse responses.
  • 119 arpeggiator-presets.
  • 95 effect-presets.
  • 52 trancegate-presets.

Latest User Reviews

Average user rating of 4.70 from 10 reviews

Reviewed By dkcalifornia
November 12th, 2020

I wanted to warn anyone who has a setup where they attach their laptop to a dock that includes a monitor in addition to using their DAW detached.

Since Nexus 3 does away with the USB dongle as its method of copy protection, it now tries to look at your computer hardware devices and come up with a "computer ID" as some sort of unique identifier. This causes a problem if your driver configuration changes when you are docked vs. not docked. Nexus 3 detects this as a violation of the registration and makes you login to reauthenticate every time you dock/undock.

I provided ReFx with very detailed steps on how to recreate this issue, but they haven't responded. Another warning, if they cannot "help" you in a single free remote session, they tell you they will charge you for subsequent sessions.

Although I can understand the hate for USB dongles, imho they have broken their product and don't care to address it even with detailed description. I am uninstalling and will not purchase from ReFx again.

Read Review

Reviewed By Innocent30102
August 30th, 2018

I really love this, it is so helpful in music production. The developer must keep up the good work.

Read Review

Reviewed By snadge
November 17th, 2011


This is a bit like Omnisphere in that it uses sample librarys and manipulates the sounds with effects, it has some great sounds but as they are sample based you cant really tweak them much, other than basics like reverb, delay and gate etc - you cant get right into the 'core' of the sound and change it liek you can on proper synths that create the sounds themselves.

it has a nice thick sound and most of its presets are great.

the user interface is nice and comes in white or black, its CPU usage is minimal but higher than average for sample based playback.

this synth can be bought as a hardware synth too.
Read Review

Reviewed By cyphersuit
March 3rd, 2010

Review Nexus 2.02

Sample player with tweakable sounds and a high quality effect library. Very low cpu use whilst sounding amazing.

User Interface

PRO: Crisp and clean and quite easy to use.
PRO: ARP and Trancegate have a really nice and easy to use GUI
PRO: Comes with different skins.
CON: You have to pay for extra skins which is kind of a let down.


PRO: Sound quality is really nice, often due to the use of Arts Accoustic Reverb (which is great), delay and other effects. Obviously they can be turned of - Nexus still sounds good then.
PRO: Loads of different sounding expansions available
CON: The standard presets are definitely focused around trance/dance mostly.


PRO: Comes with intuitive-to-use arp, trancegate, effects, mod-matrix. Sounds are much more tweakable than in Nexus1.
PRO: Layers of sounds and sequences can be turned on/off individually.
PRO: Arts accoustic reverb on board, plus loads of other effects of a very high standard


PRO: Manual is great and easy to read. Has many Pro-Tips.
CON: No vid tutorials I know of

Customer Support

PRO: Has been brill so far for me.

Value For Money

PRO: Often said to be to expensive all I can say is, that I would buy it again and be happy again. I also like how I get new soundsets on a regular basis on a planned schedule.


Didn't crash one on me while loads of other vsts did.
Read Review

Reviewed By rob_lee
August 17th, 2008

Review Nexus 2 version 2.0.1

User Interface:

Im going to say right from the off that Refx Nexus has revolutionised the way i work with music.The user interface is very pleasing to the eye due to the various skins that can be purchased,although when you purchase Nexus 2 you get 4 free skins and the Dance Volume 2 expansion which is great.Navigation within Nexus 2 is made easy with a single mouse click to access the various features within.There is nothing to confuse the user as within a couple of hours of using Nexus 2 you'll soon be very familiar with the instrument.


The sound of Nexus 2 is non other than brilliant,the quality rivals many top hardware synths without a shadow of a doubt and possibly sounds better than most.
Added in version 2 are the excellent e.q facility which are:

new EQ types: lowpass, highpass, bandpass, bandpass2, notch, peak, lowShelf, highShelf,Q factor for each band
free frequency (20-18000hz) for each band
separate gain (-/+24db) for each band
on/off switch for each band

these features alone make Nexus 2 a winner.


Nexus 2 comes with a ton of new features and i in particular love the way i can mute different layers within any given multi-sample preset,you can transpose and detune any given oscillator which then brings endless possibilitie's to new sounds being created.You can also create an empty bank and save and rename those edited presets to your own banks.The arpeggiator is totally user programmable and there is a great arpeggio library included.my favourite feature is the shuffle feature within the arp page as i regurarly use the 66% shuffle option which adds great value to the way i work.
Nexus 2 now has 2 MultiFx and the new Phaser has 16 stages and sounds truly amazing..i could go on but you have to try Nexus 2 to really find out what it can do.


Documentation is well explained.(Enough said)


I myself own about 10 of the available 20 expansions and plan to purchase the Dance Volume 3 expansion in the week however again all expansions are of the best quality and developed by the best sound designers around and all credit is due to Refx for the sheer quality of sounds provided.
Everything is there from Electro to trance and from the down right gritty industrial to the chilled out spacey stratosphere expansion.There is something for everyone here and scope to then edit and re arrange those sounds into something totally different.

Customer Support:

The Refx customer support is one of the great things about owning Nexus as they are on hand every day on the forums answering user problems and you can also submit tickets for any other support.
I like the fact that the people who designed not only Nexus but even the sound designers are there to offer advice so for that reason support is 10/10

Value For Money:

For what you get with Nexus version 2 i think the price is second to none and when you buy various expansions whether it be 1 or more you instantly get a 15% discount when you go to checkout so for me this is really good value for money


There are only 2 occassions where Nexus 2 has crashed for me using 2 presets,however this is expected in a new product and as always will be rectified with later updates and does not cause much for concern.I cannot deduct a point for this reason as it is very new and the problem only lie's with the muting and unmuting of a certain preset.Other than that i can run easily 10 instances of Nexus on my machine not that i need that many.All in all the stability for me makes Nexus 2 a winner.


If you don't own Nexus 2 then Get it! It's already improved my workflow to no end and is probably my favourite piece of gear now that it's at version 2 and the fact that Nexus now uses a copy protection dongle which holds your licence makes it more attractive and it's also a very welcome addition to an already great piece of kit.I for one would recommend Refx Nexus 2 to anyone making electronic music as from the start it oozes creativity with fantastic results and i hope this review has been helpful
cheer Rob Lee
Read Review

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Comments & Discussion for reFX Nexus

Discussion: Active
18 December 2011 at 10:41am


9 March 2012 at 4:09pm


9 June 2012 at 6:18am

Still can't figure out how to get the preset packs to load, can someone help ?

11 June 2012 at 12:29am


11 June 2012 at 7:09am




31 October 2012 at 1:49pm

Oh Amazing, this is a killer VST.. ordered mine already :)

15 November 2012 at 10:24am

@ DJ.DUCEdaKEEYS go to system and add the files from the import menu

17 November 2012 at 2:43pm


20 February 2013 at 8:24pm

How do i download? :)

25 February 2013 at 12:52pm

How do I download? :D

28 February 2013 at 1:00am

U Buy It.



5 March 2013 at 10:39pm

The best one !!.

20 June 2013 at 3:43am

It Is a Powerful Synthesizer, We Love It^^.

2 July 2013 at 2:42pm

Anybody know where I can find any good reviews on this? Gotta get it, but want to read up on it a little more before shelling out $300+ Thanks.

21 February 2015 at 5:03pm

I want it.

3 December 2015 at 11:06am

finally got it yesterday with the annual Christmas discount ;) (Y)

29 June 2016 at 6:41pm

How do I get Nexus into studio one 2.

4 July 2016 at 6:34pm

I really hope you can enable moving the license from the key to computer. I'm tired of using usb hubs on the go. Other elicenser and iLok developers have achieved this, why can you?

12 December 2016 at 1:05am

Where can I buy and download nexus???? is that hard to find?

9 November 2018 at 11:16pm

I really love this, it is so helpful in music production. The developer must keep up the good work.

5 May 2020 at 5:02am

cant find.

13 February 2021 at 2:01am

The expansions were cool!! I know how to download and import to NEXUS2.

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