Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated .

Guitar Center
5.0 (1)
$599.00
Reverb
5.0 (1)
$945.99 New
$475.00 Used
B&H
4.5 (4)
$599.00
Gear4Music
£995.00

Average Price: $644

High-end/Boutique

$200

$501+

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Price History

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

What makes the Keith McMillen Instruments K-Board Pro 4 unique compared to other MIDI controllers?

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.

Is the K-Board Pro 4 compatible with my DAW software?

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.

How is the K-Board Pro 4 powered?

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.

Can I use pedals with the K-Board Pro 4?

Yes, the K-Board Pro 4 has two 1/8" pedal inputs, allowing you to connect external pedals for additional control options.

Does the K-Board Pro 4 support MIDI Polyphonic Expression (MPE)?

Yes, the K-Board Pro 4 supports MIDI Polyphonic Expression (MPE), enabling advanced expressive capabilities in compatible software environments.

Muse Kinetics

Muse Kinetics

Introducing K-Board Pro 4 MPE Controller

Video thumbnail for Introducing K-Board Pro 4 MPE Controller by Muse Kinetics

Introducing K-Board Pro 4 MPE Controller

Muse Kinetics

Muse Kinetics

Video thumbnail for Introducing K-Board Pro 4 by Muse Kinetics

Introducing K-Board Pro 4

Muse Kinetics

Muse Kinetics

Video thumbnail for NAMM 2016 - Keith McMillen K-Board Pro 4 by sonicstate

NAMM 2016 - Keith McMillen K-Board Pro 4

sonicstate

sonicstate

Video thumbnail for K-Board Pro 4 MPE Controller: First Impressions by Muse Kinetics

K-Board Pro 4 MPE Controller: First Impressions

Muse Kinetics

Muse Kinetics

Video thumbnail for K-Board Pro 4 MPE Controller Performance: Matt Lebofsky by Muse Kinetics

K-Board Pro 4 MPE Controller Performance: Matt Lebofsky

Muse Kinetics

Muse Kinetics

Video thumbnail for KMI Synth Spotlight: K-Board Pro 4 MPE Controller meets ARGON8 from Modal Electronics by Muse Kinetics

KMI Synth Spotlight: K-Board Pro 4 MPE Controller meets ARGON8 from Modal Electronics

Muse Kinetics

Muse Kinetics

Video thumbnail for K-Board Pro 4 MPE Controller Performance: Colin Hogan at KMI by Muse Kinetics

K-Board Pro 4 MPE Controller Performance: Colin Hogan at KMI

Muse Kinetics

Muse Kinetics

Video thumbnail for The Ultra Sensitive K-Board Pro 4 Review  - Keith McMillen Instruments by VisionQuest Sound

The Ultra Sensitive K-Board Pro 4 Review - Keith McMillen Instruments

VisionQuest Sound

VisionQuest Sound

Reviews

PROS

  • Unique tactile and responsive feel with smart fabric technology

  • Provides a new world of inspiration and expression for keyboard players

  • Excellent build quality with solid construction

  • Reasonably priced compared to other MPE controllers

  • Interfaces easily and sends multiple MIDI data

  • Some users find it highly playable and engaging over months of use

CONS

  • Keys are smaller than standard, leading to potential playing errors

  • Hard and unyielding key surface can be difficult to adapt to

  • Does not fully integrate with Mainstage software as advertised

  • Unreliable vertical key position control causes performance issues

  • Some users report keys getting stuck during regular use

  • Lack of feedback from keys, akin to hitting a wooden block

Critic Reviews

Keith McMillen Instruments K‑Board Pro 4

soundonsound.com

The Keith McMillen Instruments K-Board Pro 4 stands out with its innovative approach to MIDI Polyphonic Expression (MPE), offering a responsive, customizable playing experience. Its silicone keys provide a unique touch sensitivity, while the intuitive editor software allows for extensive personalization of controls. However, the unconventional key design may not appeal to traditional keyboardists, and the initial touch sensitivity can be finicky for some players. Overall, for those willing to embrace its quirks, the K-Board Pro 4 delivers a compelling blend of technology and musical expression.

positive

Keith McMillen K-Board Pro 4, Reviewed - Synth and Software

synthandsoftware.com

The Keith McMillen K-Board Pro 4 is a groundbreaking MPE controller, offering an innovative design with non-moving keys that promote expressive play. Its solid build, customizable sliders, and user-friendly software make it a joy for electronic music production. However, the unconventional key feel may challenge traditional keyboardists, and its limitations in pitch bending compared to competitors like the ROLI Seaboard could deter some. Still, for those willing to adapt, the KBP4 promises a unique and liberating experience, making it a powerful tool for enhancing musical expression.

positive

3.0 out of 5

Based on 0 Reviews and 1 Rating

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