From Wikimedia Commons, the free media repository
- Graham Hinton (1995–2002). EMS: The Inside Story. "Tim Orr (Analogue design: 1972–1977) Prolific designer. Many of the Powertran Synthesizer kits were designed by him with Richard Monkhouse. ...", "Richard Monkhouse (Digital & Video design:1972 - 1975) Freelance design consultant often collaborating with other ex-EMS designers.""
- "All About EMS, Part 2". Sound On Sound (December 2000).
- Powertran Transcendent 2000. Vintage Synth Explorer. "According to legend, EMS didn't want their name associated with the varying build quality of a home made synth, hence the kit being marketed by Powertran."
- Powertran's advertisement in the UK, 1982. Powertran (1982).
- Powertran's advertisement in the UK, 1985. Powertran Cybernetics Limited (1985).
- Museum synths. synthmaster.de. — photograph of Transcendent Polysynth, Transcendent 2000, and some variation of Transcendent.
- C Y 's Mods on the Transcendent 2000. cykong.com.