Given that it was made in 1959, I thought it was a reasonably accurate portrayal of the newly emerging interest in hi fidelity. Flanders and Swann had a similar take on it with their 'Song of Reproduction':
https://www.bing.com/search?q='A+Son...=EUPP_CPNTDFJS
The more recent 'Not The Nine o' Clock News' sketch reminds me of the bad old days in the '90s with the Linn/Naim hegemony seriously distorting the advice of dealers at the time. I had to lie to a dealer in Bristol in order to purchase a Linn Asak cartridge, who would only sell me one if I used a Linn turntable!