1951 bis 1970. Peter Walker’s description of the electrostatic loudspeaker in Wireless World Magazin attracts great attention worldwide. 2 years later, in 1957, half a dozen journalists get a chance to hear the ESL in the London Waldorf Hotel. The QUAD II is still used as an amplifier. Later in 1967 the first 303 / 33 come on the market. Given that in the early 50s the QUAD I (still under the name Acoustical) and a suitable control unit are still in production, those two decades certainly can be referred to as very intense times for QUAD.
While in England people invent music reproduction according to the laws of physics, Belgium, France, Italy, Luxembourg, and the Kingdom of the Netherlands are busy founding the EU. In 1973 the United Kingdom joins the EU as well. Two years after Walker introduced the transistor amplifier, the Americans and Apollo 11 land on the moon.
Automobiles become more elegant and are expressive symbols of an aspiring population. In England Dr. Alex Moulton invents his “small wheel bicycle” which is still being produced almost unmodified to date – just like the ESL57.