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Kurzweil PC4-7 76-key Synthesizer Workstation

76-key Performance Controller/Synth Workstation with Aftertouch-enabled Semi-weighted action Keybed, 256-voice Polyphony, 6-operator FM Engine, ToneReal Organs, Native V.A.S.T. Editing, and 16-track Sequencer
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Kurzweil PC4-7 76-key Synthesizer Workstation
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V.A.S.T. Performance Capability from Kurzweil

Featuring massive polyphony, a modern 6-operator FM engine, a 16-track sequencer, and more, the Kurzweil PC4-7 delivers a powerful update to the company’s renowned V.A.S.T. synthesis technology. The PC4-7 packs their patented FlashPlay technology, 256-voice polyphony, and powerful DSP into a portable performance controller and synth workstation designed to meet the demanding requirements of professional performing artists, songwriters, and studio musicians. The PC4-7's 76-note, hammer-action keybed is velocity sensitive, giving you the sublime feel of an acoustic grand piano with the added expression of aftertouch.

Extensive hands-on, real-time control

Equipped with 36 programmable physical controllers, the PC4-7 provides the immediacy of hands-on, real-time control. The intuitive, streamlined user interface consists of a 4.3-inch color LCD display with six soft keys underneath, dedicated front-panel transposition and tempo controls, LED-backlit pitch bend and modulation wheels, nine programmable knobs and sliders, 10 switches, fast categorized instrument selection, and dedicated arpeggiator and sequencer transport controls. In addition to MIDI I/O and USB/MIDI, The PC4-7 provides flexible connectivity that includes a stereo audio input with FX and jacks for up to four switch pedals and two CC pedals, plus a second USB-to-device port that accepts a USB thumb drive for external storage.

Powerful features, plus a new FM Synth engine

With 2GB of factory sample content, an additional 2GB of user storage, and up to 16 Zones in Multi Mode, the PC4-7 shines as both a performance controller and synth workstation. The PC4-7 comes loaded with over 1,000 factory programs, a versatile FX engine with full editing capabilities, a 16-track Sequencer, 16 Arpeggiators, 16 Riff Generators, flexible MIDI control with 16 MIDI CC Step Sequencers, and extensive native V.A.S.T. editing capabilities. But the star of the show is arguably the powerful, newly developed 6-operator FM synthesis engine that natively imports original '80s and '90s FM SysEx files!

Load sounds instantly with FlashPlay technology

One of the features keyboardists at Sweetwater love about the PC4-7 is its ability to load any sound instantly. Kurzweil calls it FlashPlay technology, and it means you'll never slow down or botch a performance due to loading times. You've got 2GB of killer sounds in the Kurzweil PC4-7 — all with zero load time — giving the PC4-7 a staggering amount of horsepower you'll appreciate whether you're wowing an audience onstage or impressing collaborators in the studio. Kurzweil knows what you need to perform with confidence, and you get it all in the PC4-7.

Kurzweil PC4-7 76-key Performance Controller/Synth Workstation Features:

  • 256 voices of polyphony
  • 2GB of factory sample content plus 2GB of user storage
  • FlashPlay technology with zero load time
  • 1000+ factory programs
  • 6-operator FM Engine with the ability to import original '80s and '90s FM SysEx files
  • KB3 ToneReal Organs with realistic drawbars, rotary speed, chorus/vibrato, brake, percussion
  • 9 sets of programmable knobs, sliders, and buttons
  • 76-note semi-weighted hammer action keybed with velocity-sensitive keys and aftertouch
  • Extensive native V.A.S.T. editing capabilities
  • 16-track Sequencer with dedicated front-panel transport buttons
  • 16 Arpeggiators (Classic or Step sequencers) with dedicated front-panel controls
  • 16 MIDI CC Step Sequencers
  • 16 Riff Generators
  • Dedicated front-panel transposition and tempo controls
  • Ribbon connector input
  • MIDI I/O, USB/MIDI, USB-to-device
  • 2 x 1/4-inch audio input connectors
  • Stereo 3.5mm audio input jack with FX
  • 2 pairs of stereo outputs
  • 4 switch pedals (via 2 stereo jacks)
  • 2 CC pedal inputs

Warranty Info

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Tech Specs

  • Type: Keyboard Workstation
  • Sound Engine: Dynamic VAST, 6-Operator FM Engine, KB3 ToneReal Organs
  • Analog/Digital: Digital
  • Number of Keys: 76
  • Type of Keys: Semi-weighted
  • Aftertouch: Yes
  • Velocity Sensitive: Yes
  • Other Controllers: Pitch Wheel, Modulation Wheel, 9 x Sliders, 9 x Knobs, 9 x Assignable Switches
  • Polyphony: 256 Notes (dynamically allocated), 16-part Multitimbral
  • Presets: Over 1000 Factory Programs, Over 50 Factory Multis, 4000 User Program IDs
  • Oscillators: 25 x KVA Oscillators (Anti-Aliased/Aliased)
  • Waveforms: Sine, Triangle, Sawtooth, Square Pulse Width
  • LFO: 2 x LFOs (local/global)
  • Envelope Generator: Yes
  • Effects Types: Reverb, Chorus, Delay, Flanger, Phaser, Tremelo, Panner, Rotary, Distortion, EQ, Compression, Ring Modulator
  • Arpeggiator: Yes
  • Sequencer: 16-track
  • Audio Playback: 16 Tracks of Programs, WAV/AIF Supported
  • Memory: 2GB User Flash Memory
  • Storage: USB Flash Drive
  • Audio Inputs: 2 x 1/4" Line (Stereo Pair), 1 x 1/8" Stereo Line
  • Audio Outputs: 4 x 1/4" TRS (Two Stereo Pairs)
  • Headphones: 1 x 1/4" Stereo
  • USB: 1 x Type B, 1 x Type A
  • MIDI I/O: In/Out/USB
  • Pedal Inputs: 1 x 1/4" (sustain/switch1), 1 x 1/4" (switch2), 2 x 1/4" (continuous control)
  • Other I/O: Ribbon Controller (sold separately)
  • Features: Transpose
  • Power Source: 15V DC power supply (included)
  • Height: 4.24"
  • Width: 46.54"
  • Depth: 14.07"
  • Weight: 19.4 lbs.
  • Manufacturer Part Number: AMS-PC4-7

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Customer Reviews

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Rated 5/5

Amazing lightweight board!!

I recently purchased a Kurzweil PC4-7 (from Sweetwater) as a backup lightweight option for gigs when I did not want to haul a heavy Korg Kronos 88 with road case. I am blown away by the sound/features/controllers, etc. in a package that weighs only 19lbs!! After spending several weeks programming sounds, importing samples, etc. I finally debuted it with a band this past weekend and I can honestly say I did not miss the Kronos, and I love that keyboard!

The PC4 range has been out for a while now so there are many videos and reviews out there. Here are a few highlights for me:

1. The weight was the main feature for me! When carrying it, the PC4-7 feels like a toy portable keyboard but when playing it, the semi-weighted action feels good for playing a wide mix of sounds. Obviously you have to compromise somewhere to achieve such a light weight and it would not be appropriate for someone looking for a fully weighted piano action, but I was able to really dig in with piano parts.

2. I like the balance between workstation complexity and stage piano ease of use. I have all of my song-specific patches in Multi mode but when a song calls for just a basic keyboard type (piano, B3, EP, etc.) it's great to just choose via category buttons in Program mode. Kurzweil improved the category system over the Forte SE and older PC boards where user programs had to be stored in banks that did not line up with the category type. The user interface faders/buttons/etc. are mapped really well and everything is pretty intuitive. Dedicated transpose buttons, a variation button to add a pad, screen prompts for each fader, are all great.

3. The front panel design with blue backlit buttons/pitch/mod wheels, and purple zone buttons looks great and is easy to navigate on a dark stage.

4. I was concerned that importing user samples and creating keymaps/programs would be a nightmare on this keyboard, but was pleasantly surprised. It's not a quick process but it worked exactly as the manual described, and did not take any more time than it would have taken on other hardware keyboards (Kronos, Triton Extreme) that I have used in the past. Some users have complained that you cannot sample directly to the PC4 but I find it easier to prepare the samples on a DAW and transfer with a USB stick. The presence of user samples does not seem to prolong the boot-up time which is a plus.

The only thing I would change about this keyboard is adding an internal power supply. Highly recommended for anyone looking for an extremely lightweight keyboard that is still full featured!!
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