It was definately Maxell’s advert. I remember it in all the HiFi magazines in the early eighties. Jensons ad had a similar theme, but had enormous speakers in the boot of a car (I think you yanks call it a trunk) . Speaker manufacturer Cervin Vega also had a similar advert for their “earthquake” series of speakers, also in the early eighties. Back then there wasnt many choices if you wanted an optimum brand of blank cassette, TDK and Memerox were about the only similar priced options to Maxell, but my Nakamichi recorder gave the best results with the Maxells