Digitech HM4 Harmony Machine Guitar Harmoniser 1U Rack Mount Effects - 100V

  • Sale
  • Regular price $313.00


Digitech HM4 Harmony Machine Guitar Harmoniser 1U Rack Mount Effects - 100V

The DigiTech HM4 Harmony Machine is a vintage rack-mount pitch shifter and harmoniser from the 1980s. Known for its advanced capabilities at the time, it allows guitarists to create intelligent harmonies by selecting the key and style, including options like rock, jazz, blues, and country. The unit can produce one or two-part harmonies. It includes straightforward controls for key selection, preset selection, output level, and input level, and comes with MIDI in, out, and through ports for integration with other MIDI devices.


  • This is a used unit. 

  • This unit is in good condition for its age. It shows a small amount of general wear from use and age like some marks, nicks and scratches. Please see all photos. 

  • This unit is 100% functional. All controls work as they should. 

  • Please be aware this unit is 100V. This means it MUST be used with a step-down transformer, not a travel adaptor. If you are unsure about this please let us know. We have some great, compatible step-downs for sale HERE They are designed in Australia for use in Australia and can be run 24/7.

  •  If you purchase from outside Australia you may need a step-down transformer to use this unit. Please contact us if you need any help sourcing the correct product. 

  • This sale will include a Japanese IEC cable for you to use with your step-down.

  • This sale is for the HM4 and Japanese IEC. Nothing else is included in the sale. 


Your order will be processed within 5 business days.

If you are in a remote area you may incur extra fees. 

International import tax, duty, vat, custom fees or any other charges are not covered by us, nor included in the shipping fees. These are the responsibility of the buyer. 

Return Policy:

We do not accept returns for incorrect purchase or change of mind. 

Returns will only be accepted for manufacture defects / faulty items. Please contact us if you have any problems with your purchase and we will strive to work it out with you.