Kurzweil SP7 Grand 88-Key Stage Piano with Weighted Hammer Action

Kurzweil SP7 Grand: Flagship Grand Piano Feel for the Stage

The Kurzweil SP7 Grand is an 88-key stage piano built around a German 9-foot concert grand sample set drawn from the flagship K2700 workstation. A stage piano is a performance keyboard engineered for gigging rather than home practice, prioritizing authentic piano feel, fast sound recall, and rugged stage connectivity over built-in speakers. Weighing about 36 pounds in a steel and aluminum chassis, it packs a professional grand voice into a case a single player can carry. For the working pianist, it is the instrument that makes every stage sound like a concert hall.

A.T.S.T.: A New Synthesis Platform

At the core of the instrument sits A.T.S.T., Kurzweil's new Authentic Timbre Synthesis Technology, built on a custom semiconductor. A.T.S.T. is a fixed-PCM subtractive engine with a variable filter and a 2x-oversampling 96kHz state-variable filter, which together produce high-fidelity audio and remarkably smooth transitions between velocity layers. In practical terms, that means the piano responds to how hard you play without the abrupt jumps in tone that plague lesser samplers. Studio producers and gigging pianists both benefit from a grand that feels continuous and alive across the entire dynamic range.

Fatar TP/110 Hammer Action

Playability starts with the 88-note, fully-weighted hammer-action keybed using Fatar's TP/110 mechanism. Weighted hammer action recreates the graded resistance of an acoustic piano, where heavier hammers in the bass and lighter ones in the treble give the fingers real physical feedback. The TP/110 is balanced for feel and playability across styles, so a classical player and a pop keyboardist can each find their touch. This is the action that lets a pianist translate decades of acoustic technique straight onto the stage.

256 Voices of Polyphony

The instrument delivers 256 voices of polyphony, the ceiling on how many individual notes can sound at once. Because held pedal passages, layered splits, and lush pad stacks each consume voices, a high count prevents the note-stealing that cuts off sustained chords mid-phrase. With 256 voices on tap, even a busy multi that layers piano, strings, and pad survives the sustain pedal intact. Worship keyboardists and film-score players who lean on long, overlapping textures gain real headroom here.

2 GB of Factory Sounds

Onboard memory holds 2 GB of factory samples feeding 301 programs and 512 factory multis organized into 13 categories. The headline German "D" 9-foot concert grand is further enhanced with string and pedal resonance modeling, envelope- and velocity-controlled key-off samples, and half-damper pedaling for nuanced sustain. Beyond acoustic pianos, the library spans electric pianos, clavs, organs, strings, pads, brass, synths, and more for full set coverage. A gigging player can move from a jazz ballad to a synth-driven anthem without touching a second keyboard.

21 Effect Algorithms

Sound shaping runs through 21 effect algorithms spread across two aux FX busses and per-program insert effects. The palette includes reverb, BPM-synced delay, chorus, flanger, rotary speaker, tremolo, auto wah-wah, compression, several distortion types, a bit crusher, and a four-band master EQ. Effects are what turn a raw sample into a finished, mix-ready sound, adding the ambience and movement that a bare piano lacks. On stage this means an electric piano can drip with vintage chorus while the grand stays clean, all in one preset.

Color Touchscreen and USB Audio Interface

Navigation happens on an elegant 1024 x 600, 7-inch color LCD touchscreen that keeps program selection and deep edits within a tap. A built-in 2-in/2-out 24-bit/48kHz USB audio interface connects to a Mac or PC, with loopback functionality for streaming and production workflows. An audio interface converts the instrument's analog signal into digital audio a computer can record, eliminating the need for a separate box. For the home studio producer, that turns the stage piano into a self-contained recording front end.

Built for the Performing Musician

Performance control comes from a 16-zone multi mode, hybrid arpeggiators that fuse a step sequencer with a note arpeggiator, and a programmable pitch/mod joystick with eight knobs and eight buttons. Two balanced XLR-1/4-inch combi inputs feed automatic vocal pitch correction and up to four-part real-time harmony, ideal for the singer-keyboardist working solo. Balanced 1/4-inch main and monitor outputs, MIDI In/Out, and USB MIDI make it fast to integrate into any stage rig. From worship stages to jazz clubs, this is a flagship built to gig night after night.