Hammond XK-4 Portable Organ

Rooted in nearly a century of Hammond heritage yet built for today’s stage, the XK-4 portable organ delivers authentic tonewheel character in a compact, gig-ready format. Powered by the new Modelled Tone Wheel 2 (MTW2) engine, it meticulously recreates all 91 virtual tonewheels — including the subtle pitch fluctuations and volume irregularities that give vintage Hammonds their unmistakable personality. A Virtual Multi-Contact keyboard system, new-generation Digital Leslie algorithm, integrated tube modeling system, pitch bend and modulation wheels, user-assignable controls and a vivid color display place classic expression and modern flexibility directly at your fingertips. With a standard IEC AC connection and professional connectivity — including an 11-pin Leslie jack — the XK-4 brings the “King of Instruments” to players who demand authenticity without sacrificing portability.

MTW2 Sound Engine and Vintage Character Control

At the core of the XK-4 is the advanced MTW2 sound engine, a detailed digital recreation of the original electromechanical tonewheel generator. This engine captures the natural imperfections that define a classic B-3 experience — from tonewheel backlash to subtle amplitude variations — while allowing deep customization of tone and response. The exclusive matching transformer emulation system enhances fullness and harmonic weight, while adjustable key click and leakage characteristics further refine the vintage personality. In addition to traditional drawbar tones, the XK-4 includes Italian, British and Japanese transistor combo organ models, plus Classical and Theatre pipe organ voices that can be registered in authentic fashion.

Virtual Multi-Contact Keyboard and Expressive Control

The XK-4’s 61-note semi-weighted waterfall keyboard incorporates Hammond’s Virtual Multi-Contact system, replicating the progressive harmonic engagement of classic multi-contact keys. This delivers the tactile nuance and response players expect from vintage Hammonds. Pitch bend and programmable modulation wheels expand expressive possibilities beyond traditional organ performance, while user-assignable knobs and switches allow control of internal parameters or external MIDI devices. A built-in Master Equalizer ensures tonal adaptability for any venue, and the color display provides clear, intuitive access to performance and programming functions.

Next-Generation Digital Leslie and Tube Modeling

A newly developed Digital Leslie algorithm models the airflow and spatial complexity of classic rotating speaker cabinets with remarkable realism. Eight distinct Leslie models — including 122, 145 and 147 variants — allow detailed adjustment of horn and drum levels, rotation speeds, ramp times and microphone positioning. The new tube modeling system recreates the warmth and harmonic richness associated with vintage vacuum tube circuitry, while four overdrive profiles (Tube, Solid, Clip, EP amp) and additional multi-effects — including tremolo, wah, phaser, delay and chorus — expand the tonal palette even further.

Professional Connectivity and Real-World Flexibility

Designed for seamless stage and studio integration, the XK-4 offers versatile output routing including stereo line outputs, rotary out and dedicated organ pedal out. An 11-pin Leslie jack supports direct connection to external Leslie cabinets, automatically managing signal routing between digital and physical rotary systems. USB Type A and B ports enable patch storage, tonewheel customization backup and direct MIDI communication with Mac or PC systems. AUX input with independent volume control allows integration of external audio sources, while the standard IEC AC power connection automatically adapts to international voltage requirements.

A Modern Hammond for Today’s Performer

Combining authentic MTW2 tonewheel realism, virtual multi-contact playability, new tube modeling warmth, advanced Digital Leslie performance and professional connectivity in a lightweight 20.72 lb chassis, the XK-4 stands as a powerful yet portable solution for serious organists. Whether used on stage, in the studio or paired with external Leslie cabinets and pedalboards, it delivers classic Hammond authority with modern control and reliability. For players seeking genuine Hammond character in a streamlined, performance-ready instrument, the XK-4 provides the essentials — refined for the next generation.