geoffkait,
Have you ever wondered why defibrillators are calibrated/adjusted in Joules and not in Volts or Amperes? Hint: Volts and Amperes are variable. (Volts usually go up to 1000 or so, Amperes up to 40s or so).
Otherwise, you get half a point for Volts vs. Amperes statement. It would have been full point if you had elaborated on it with actual numbers.
Sound advice: Do not touch electrical parts of Quad speakers (or any other Quad product for that matter). Also, no matter how tickled you may want to be, do not grab 100+ kV power line.