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The MultiBox is a multi-function MIDI interface box that acts as a MIDI Thru box as well as a TRS MIDI adapter.

MutiBox Top View

The MultiBox is designed to be a multi-purpose problem solver in MIDI systems. It can be used for any of these purposes, most of them at the same time:

  • MIDI Thru Box – splits one incoming MIDI signal to multiple outputs (up to three standard 5-pin MIDI outputs)
  • TRS MIDI Converter – converts standard 5-pin MIDI to TRS MIDI for use with devices that require it
  • Phantom Power Adapter – combines a 5-pin MIDI connection with AC or DC power and routes them to a 7-pin MIDI connection. This can be used to phantom power a compatible MIDI controller
  • Bidirectional MIDI Converter – splits a bidirectional MIDI connection into separate MIDI input and output jacks, or combines a MIDI input and output connection into a bidirectional MIDI connection

Typical Uses

  • Use as a MIDI splitter (AKA thru box) to split the output of a MIDI controller to multiple devices, both standard 5-pin MIDI and TRS MIDI.
  • Put in a rack with an Axe-Fx or Kemper Profiler, and it will combine MIDI In, MIDI Out and power connections into a single 7-pin MIDI cable to go to the MIDI controller.
  • Split the bidirectional MIDI connection from a Mastermind into a MIDI input and multiple MIDI outputs.

Product Information


  • 1 – 7-pin MIDI input (compatible with 5 or 7 pin MIDI connections)
  • 1 – 5-pin MIDI output, with optional bidirectional MIDI connection to the MIDI input
  • 1 – 5-pin MIDI thru
  • 1 – 5-pin MIDI jack that can be configured as a MIDI thru or a MIDI input that  can be sent to the 7-pin MIDI input jack
  • 4 – TRS MIDI jacks, individually configurable for Tip Active, Ring Active and Standard MIDI types
  • 3 year limited warranty


  • Power Requirements: 9-12V, AC or DC (either polarity), 50mA minimum. More current will be required if phantom powering a device. AC adapter not included.
  • BOSS-type power connector, 5.5mm/2.1mm barrel connector
  • Dimensions: 4.41 (w) x 2.38 (d) x 1.65 (h) inches (11.20 (w) x 6.05 (d) x 4.19 (h) cm)
  • Weight: 0.52 lbs / 236g
  • Made in USA

Mastermind Editor
(v4.0.4) TEST

MultiBox Quick Start Guide


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