But above all, of course, there is the special sound experience that you can expect from a WERSI organ – and thus also from the OAX500LS. Whether orchestral, solo and synthetic sounds of the highest quality or of course the legendary organ sounds of the famous WERSI drawbar system: All “musicians” of your OAX500LS play at the highest level!

And so that you can fully concentrate on your playing, the WERSI engineers have invested all their decades of experience in building top class organs in a particularly intuitive user interface. Thanks to clearly arranged groups of switches and the large 11.6” touch display, you can direct your WERSI orchestra in the “twinkling of an eye” – if necessary even directly while playing! Open up new musical horizons now!

17-key pedal

Integrated loudspeakers

Sills with two switches

All features of OAX500LS at a glance


An idea with a future:
Full software control of all functions and timbres, constant further development of the entire system, updates possible via download – the times when every change required complex and expensive hardware modifications are now a thing of the past.

The small one among the big ones:
State-of-the-art technology and noble design in the smallest space!

Further highlights:

  • Complete OAX operating system
  • High-quality, lightly weighted FATAR keyboards, both manuals with 61 keys, each with velocity and Channel Aftertouch
  • 17-key pedal with touch dynamics
  • 2 foot switches on the swell pedal, additional piano pedal
  • 11.6″ Color Multitouch Display
  • 9-fold upper manual drawbar and 7-fold lower manual drawbar
  • 12-fold drawbar set for volume
  • 6 effect sound buttons
  • Including matching bench seat
  • Integrated speaker system with 2 x 30 Watt for the treble in the upper part and 2 x 80 Watt for the bass and midrange sound in the lower part
  • Colours: High gloss black, mother of pearl white, brown metallic, others on request or fine veneers walnut, rosewood, mahogany


2000 factory sounds and 57 drum sets for all musical styles

Church organ:
Historical church organ built by the master organ builder Gottfried Silbermann (1683-1753).

Sound productions:
Sampling, wavetable synthesis, FM synthesis, analog synthesis

Theoretically unlimited, only limited by CPU power

Sound controls:
Six Easy-Sound-Controls per timbre -> Equalizer, Delay, Sample Start Point, Attack, Release, Vibrato, Filter and much more

Wersi OAX7 and VB3 organ software simulations of the highest quality, firmly integrated, controllable via real drawbars

Four send effects with reberb 1, reberb 2, chorus and delay; further effects individually programmed in the sounds.

EASY mode:
Three sounds each on the upper and lower manual and one pedal sound

PROFI mode:
Up to 16 timbres can be distributed among the manuals. Maximum of 12 voices each for the upper or lower manual.

Effect Sounds:
Six effect sound buttons to play effects like crash cymbal or vocal effects.

Music Archive:
The Music Archive is a list of Total Presets, in which the right sounds and style with the right tempo are stored for a specific song. The Music Archive is divided into the sections WORLD with 600 titles and GERMAN with 300 titles. In the OWN section you can add your own favourite titles to the Music Archiv.

Factory Total Presets:
The permanently stored factory total presets show the sonic possibilities

Own total presets:
5000 own Total Presets can be stored

Playing areas/split points:
For each sound an individual playing area can be assigned to the manuals – this way complex sound worlds can be composed

One Style, MIDI sequence or MultiMedia file each can be saved in the Total Preset with individual settings

Individual settings for the four send effects

Foot switch assignments, effect sound assignments, notes, drawbar settings, tempo, transpose

Style player:
370 factory styles, 150 of them with Live Realdrums

STS presets:
Four STS presets are stored for each of the 370 Factory Styles. Select a style and play directly with the STS presets to create the right sounds

Harmony recognition:
One-Finger-WERSI, Easy Mode 1 and 2, Chord-Mode, Chord-Mode with Bass, Interval-Mode, Organist-Mode, Pedal-Mode, Piano-Mode

Convert Styles:
Your OAX instrument directly loads the older styles of the OAS series, styles of other manufacturers can be converted with paid extensions.

MIDI player:
Plays General MIDI sequences; volume levels of the 16 channels can be stored in Total Presets

Multimedia player:
Updated Multimedia Player plays all common audio formats

ACC database:
Style/MIDI/Mp3/Wave database with management function of up to 5000 own files

Audio recording:
With the audio recording you can directly record your performance and save it in wave format

11.6″ Color Multitouch Display in 16:9 cinema format (resolution 1366 x 768)

High-quality, lightly weighted FATAR keyboards, both manuals with 61 keys, each with velocity and Channel Aftertouch

Manual dynamics:
Freely programmable dynamic curves, individual assignment to all manual sounds possible

Bass pedal:
17-key pedal with touch dynamics

Pitch Bend and Modulation Wheel

Foot switch:
Two footswitches on the swell pedal and one piano pedal; all freely assignable and individually storable per Total Preset

Swell Pedal:
Swell curve per manual sound and accompagnement freely programmable

Control panels:
Clearly arranged control panel with high-quality push buttons

Organ drawbars:
9-position upper manual drawbar and 7-position lower manual drawbar

Functional drawbar:
Freely configurable drawbar “CC” for controlling special functions, organ drawbar can also be used for data input

Display languages:
German, English, French and Dutch

VST 3.0 Host:

Total number of plugins:
With up to 16 VST Instruments and 16 VST Effects (partly preset with factory plug-ins)

Signal paths can be routed in the VST Host as required

VST presets:
Several VST configurations can be stored

Input mixer:
Separate sections for the manuals and accompaniment sound, drums and RealDrums, each with its own equalizer. The Line-In and Wave inputs for playing audio files each have their own equalizer, send and insert effects. The microphone input is equipped with two send effects, an insert effect and a talk function.

Output mixer:
With separate volume and EQ settings for Line Out 1, 2 and headphones

Separate presets can be stored for the input and output mixer

Central electronics:
Modern motherboard with i7 processor

RAM memory:
16 GB RAM (of which 8 GB can be used for your own samples), optionally up to a maximum of 32 GB RAM

Hard disk space:
Super fast M.2 hard disk with 250 GigaByte guarantees shortest loading times

Other storage media:
DVD or optionally Blu-ray

Operating system:
Windows 10 64 bit

USB 3.0 – 4 x on the front side, others on the back

6,3mm stereo jack

1 x High End microphone preamplifier (jack)

HDMI Video Output

Audio inputs:
1 x line-in stereo right/left (mono jack)

Audio outputs:
2 x Line-OUT Stereo right/left (mono jack)


MIDI over USB function for direct connection to PC and Mac

Available in high quality lacquering in the following colours:

  • Black Metallic
  • White High gloss
  • Brown Metallic
  • other colours on request
  • or fine veneers walnut, rosewood, mahogany

Width x height x depth: 1100 x 980 x 620 mm

72 kg incl. organ bench