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CAD Ethernet Control

The CAD Ethernet Control is designed to reduce unwanted high frequency noise on the Ethernet Network connection in audio and video equipment and will work with both streaming services (Spotify, TIDAL, Qobuz, etc.) and locally stored music files.

CAD GC1.1 + GC3.1 Ground Control

  • Scott's white paper here
  • The Ear GC-1 review here
  • The Ear GC-3 review here
  • HiFi+ review here
  • Stereotimes GC-1 review here
  • The Audio Beat GC-1 & GC-3 review here
  • The Audiohileman's GC-1 & GC-3 review
  • GC1 requires a cable which is £300 extra
  • GC3 includes 2 cables
  • If you are outside the UK please contact MCRU before purchasing any CAD product


  • We think this is the best USB cable on the planet.
  • MKII R latest model.
  • Yes we have heard it, yes its all you will ever need.

CAD USB Control

The new CAD USB Control design resulted from our research and development of the CAD Ground Controls, 1543 MKII DAC and the many USB cables we have produced over the last 10 years. In our experience, reducing unwanted high frequency noise in audio systems significantly improves sound quality. The frequency of noise varies in every audio system and in each domestic environment – even the time of day on mains power. The USB Control reduces this unwanted high frequency noise across an extremely broad frequency spectrum, from KHz up into the GHz range. HiFi + Review

CAD USB Filter

The new CAD USB Filter replaces the USB I cable. The Filter employs the same patented filter technology, developed in-house by Scott Berry, as used in the new USB II-R cable. The CAD Audio USB Cables are optimised specifically for audio use in conjunction with a USB Digital to Analogue Converter.