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Average Price: $644
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$200
$501+
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Based on price data from 3 merchants for "Keith McMillen Instruments K-Board Pro 4". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Embrace the future of musical expression with the Keith McMillen Instruments K-Board Pro 4. This 48-key USB/MIDI MPE Keyboard Controller is not just a tool—it's a gateway to a more nuanced and expressive playing experience. Crafted with cutting-edge Smart Sensor Fabric technology, each key responds to your touch in multiple dimensions, offering attack velocity, release velocity, continuous pressure, and even horizontal and vertical positioning. This means you can achieve a level of expressiveness akin to acoustic instruments, all while playing with the familiar feel of a traditional keyboard.
Built for both studio and stage, the K-Board Pro 4 is durable, thanks to its resilient silicone keys and robust aluminum construction. Its lack of moving parts ensures longevity, while its USB-powered, class-compliant design guarantees seamless compatibility across MacOS, Windows, iOS, Android, and any MIDI-capable hardware. Whether you're diving into complex software synths or interfacing with classic MIDI equipment, this controller adapts effortlessly to your needs.
Four assignable touch-sensitive sliders further amplify your creative potential, allowing you to control parameters like octave shifts or vibrato depth on the fly. By embodying the new MIDI Polyphonic Expression (MPE) standard, the K-Board Pro 4 offers a revolutionary approach to electronic music performance, capturing the intricacies of your musical nuance with precision.
Key Features:
- 48-key MIDI keyboard controller with Smart Sensor Fabric technology
- Supports MPE (MIDI Polyphonic Expression) for nuanced play
- Each key outputs attack/release velocity, continuous pressure, and position data
- Four touch-sensitive sliders for customizable parameter control
- Durable aluminum construction with resilient silicone keys
- USB-powered; class-compliant for broad compatibility
- Compatible with MacOS, Windows, iOS, Android, and MIDI-enabled hardware
Product specs
| Type | Keyboard Controller |
| Number of Keys | 48 |
| Type of Keys | Smart Sensor Silicone Keys |
| Velocity Sensitive | Attack Velocity, Release Velocity |
| Aftertouch | Multi-dimensional Touch Sensitivity ; Continuous Pressure, Horizontal Position, Vertical Position |
| Pedal Inputs | 2 x 1/8" (pedal) |
| MIDI I/O | USB, MIDI Polyphonic Expression |
| USB | 1 x Type Micro-B (MIDI), 1 x Type Mini-B (MIDI expander) |
| Software | Bitwig Studio 8-Track |
| OS Requirements - Mac | OS X 10.9 or later, iOS |
| OS Requirements - PC | Windows 7 SP1 or later, Android |
| Power Supply | USB bus powered |
| Height | 1.50" |
| Width | 25.50" |
| Depth | 8.50" |
| Weight | 6.0 lbs. |
FAQs
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What makes the Keith McMillen Instruments K-Board Pro 4 unique compared to other MIDI controllers?
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The K-Board Pro 4 features Smart Sensor Silicone Keys with multidimensional touch sensitivity, allowing for expressive control over attack velocity, release velocity, and continuous pressure, as well as horizontal and vertical position.
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Is the K-Board Pro 4 compatible with my DAW software?
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The K-Board Pro 4 is compatible with most major DAWs and comes with Bitwig Studio 8-Track software. It works on Mac OS X 10.9 or later, Windows 7 SP1 or later, iOS, and Android.
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How is the K-Board Pro 4 powered?
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The K-Board Pro 4 is USB bus powered, meaning it draws power directly from your computer or device via a USB connection, eliminating the need for an external power supply.
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Can I use pedals with the K-Board Pro 4?
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Yes, the K-Board Pro 4 has two 1/8" pedal inputs, allowing you to connect external pedals for additional control options.
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Does the K-Board Pro 4 support MIDI Polyphonic Expression (MPE)?
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Yes, the K-Board Pro 4 supports MIDI Polyphonic Expression (MPE), enabling advanced expressive capabilities in compatible software environments.
Videos
Muse Kinetics
Introducing K-Board Pro 4 MPE Controller
Reviews
PROS
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Unique tactile and responsive feel with smart fabric technology
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Provides a new world of inspiration and expression for keyboard players
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Excellent build quality with solid construction
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Reasonably priced compared to other MPE controllers
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Interfaces easily and sends multiple MIDI data
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Some users find it highly playable and engaging over months of use
CONS
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Keys are smaller than standard, leading to potential playing errors
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Hard and unyielding key surface can be difficult to adapt to
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Does not fully integrate with Mainstage software as advertised
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Unreliable vertical key position control causes performance issues
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Some users report keys getting stuck during regular use
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Lack of feedback from keys, akin to hitting a wooden block
Critic Reviews
3.0 out of 5
Based on 0 Reviews and 1 Rating
Genre Usage
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