Organ Expander Module

Legendary Hammond B3 emulation in pocket size format

The B4000+ packs the legendary Hammond B3 organ into an ultra-compact box. No one would build a guitar without a neck, without which it simply wouldn't work. That's why Ferrofish designed the B4000+, with nine drawbars: to touch, to tweak, but most of all: to play!

Based on one of the best and most powerful digital signal processors on the market, the Sharc DSP from Analog Devices, the sound and warmth of the B3 has been recreated down to the smallest detail - with all the electrical and mechanical shortcomings that made the instrument a legend.

Just like the real organ, with voluminous bass belly, defined mids and the indispensable "scream" in the treble: the authentic sound of a living electromechanical B3.

The B4000+ simulates all 91 tonewheels, with crosstalk and mechanical wear if desired. All fully polyphonic, of course, with scanner vibrato, tube amp and reverb and - not to forget - the legendary Leslie. Everything perfectly simulated and adjusted.

Only the weight of the original B3 has been reduced a little.

Two keyboards can be connected directly to the MIDI ports of the B4000+ without MIDI mergers to play both the upper and lower manuals. A pedal manual can also be added for a full B3 simulation, so that up to three manuals can be played simultaneously, with full polyphony. A pedal can be added for external volume control, as well as a switch for sustain or rotary speed control. If only one keyboard is used, it is still possible to play two manuals by using the internal split mode. MIDI data is also transmitted via USB to record MIDI data in the sequencer or play it back from the sequencer.

External analogue signals can be fed into the B4000+ via the analogue input connector. It will blend with the sound of the B4000+ at any point in the effects chain.

The B4000+ is the perfect and highly affordable solution when the legendary organ sound is needed in a pocket size.



Hardware Features:

  • Nine drawbars
  • Six high resolution metal dials
  • TFT color display

Organ Emulation Features:

  • Three full polyphony manuals
  • Percussion (including harmonic, attack, decay)
  • Tonewheel emulation (including leakage and condition)
  • Mechanical emulation including keyclick and key contact delaysimulation

Sound Creation:

  • Physical circuit modelling
  • Rotating speakers emulation
  • Tube amplifier emulation (with overdrive)
  • FX section: chorus/vibrato, reverb, compressor
  • External audio input routing through FX
  • Global tuning
  • Envelope attack and decay
  • MIDI keysplit and velocity
  • 128 presets

Analog I/O

  • 2/2 Channels

Headphone Output

  • 1


  • 2 x Input
  • .

USB 2.0

  • 1 (for MIDI to host PC/Mac)


  • ARM Cortex M3 and Sharc DSP

Expression Pedal

  • Input
Note: For pedal functionality Ferrofish recommend FC-7 pedal from Yamaha.

Sustain Switch

  • Input

Power Supply

  • DC 12 V / 0,5 A


  • 2.3 kg

Ferrofish B4000+

Organ Expander Module


Organ Expander Module

MusicNetwork offers consulting, training and support services to complement its wide range of products. Our staff is experienced in working with professional audio hard- and software.


Das breite Sortiment von MusicNetwork wird durch verschiedene Dienstleistungen wie Beratung, Schulung und Support ergänzt. Unsere Mitarbeiter verfügen über langjährige Erfahrung im Umgang mit professioneller Hard- und Software für den Audio-Bereich.



MusicNetwork AG

Seestrasse 93, 8810 Horgen

+41 44 454 20 30


MusicNetwork AG

Seestrasse 93, 8810 Horgen

+41 44 454 2030


MusicNetwork AG