B4000+ Hammond B3 Organ expander module

Legendary Hammond B3 emulation in pocket size format


Rebirth of a legend.

The B4000+ packs the legendary Hammond B3 organ into an ultra compact box. Nobody would build a guitar without a neck, without it, it just will not work. That’s why we’ve developed the B4000+, with nine drawbars: to touch, to tweak, but most important: to play!

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

Just as the real organ with voluminous bass belly, defined mids and indispensable “scream” in the heights: the authentic sound of a living electromechanical B3.

The B4000+ simulates all 91 Tonewheels, if desired, with crosstalk, and mechanical wear. All of course fully polyphonic, 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 we have reduced a bit.

Two keyboards can be directly connected to the MIDI ports of the B4000+ without a MIDI merger, for playing both the upper and lower manual. For a full featured B3 simulation, a pedal manual can added too, making up to three manuals that can be played simultanously, with full polyphony. A pedal can be added for external volume control, also a switch for sustain or rotary speed control. If only one keyboard is used, its still possible to play two manuals by using the internal split mode. MIDI data is also transferred via USB, to record the MIDI data to the sequencer, or for playback from sequencer.

External analog signals can be fed into the B4000+ by using the analog input plug. It will be merged with the B4000+ sound at any point of the effects chain.

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

The Allmighty Tonewheel Organ.

The Hammond Organ, already built in 1935, was sold millions of copies, and has, although actually designed for church music, left a lasting impression in almost all genres of music. Countless world-famous musicians have always discovered new facets, and created monumental titles.

The technique of creating different frequencies using a rotating tone wheel and electromechanical pickups and mixing them via the drawbars was revolutionary at that time. Together with a tube amp and a Leslie, the possibilities of this instrument are almost countless.

Nowadays the Hammonds are as popular as ever, only the maintenance of the instruments is a growing challenge.

Many have tried to save the sound of the B3. The challenge is to reproduce all of the instruments original character traits. Therefore, the B4000+ does not just play samples; it simulates the entire mechanics of the original in all details so that all nuances of the instrument can be taken into account. For an ultimate authentic sound experience.

“Clonewheels”: B3-in-a-box.

The B4000+ is the result of years of development, packed in a handy case with intuitive operation,
A real step forward and a new chapter in the B3 legend.



Analog I/O

2/2 Channels

Headphone Output



2 x Input

USB 2.0

1 (for MIDI to host PC/Mac)


ARM Cortex M3 and Sharc DSP

Expression Pedal


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

Sustain Switch


Power Supply

DC 12 V / 0,5 A


2,30 kg


B4000+ Module, Power Supply, Manual

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

B4000+ Hammond B3 Organ expander module

Get authentic.

(c) Hammond, B3 are Trademarks of Hammond Suzuki USA, Inc. All product names used on this website are trademarks of their respective owners, which are in no way associated or affiliated with Ferrofish GmbH