The search returned 4 articles:

  1. November 2022: Project: Active Monitor Speakers, Part 1 by Phil Prosser, 3 shop items [print issue] [online issue]
  2. December 2022: Project: Active Monitor Speakers, Part 2 by Phil Prosser, PCBs: SC 01112221, 11 shop items [print issue] [online issue]
  3. January 2023: Project: Active Subwoofer, Part 1 by Phil Prosser, 3 shop items [print issue] [online issue]
  4. February 2023: Project: Active Subwoofer, Part 2 by Phil Prosser, 5 shop items [print issue] [online issue]