This advert was in a 1981 "Radio 1 On Show" magazine that my sister found while clearing out. Did anyone else go to a Radio 1 Roadshow ? Hitachi were obviously very proud of the number of features. I could only work out the date by looking at the competition. We are 36 years too late to enter. £425 for a "Mini Disco" system sounds a lot. Finally, for those of you who used to follow the UK charts I was rather amused to see a picture of the literally trend setting lady who worked them all out. For those outside the UK Tony Blackburn also in the picture was the first DJ on Radio 1 still presents programmes but like everyone else over the age of 40, including the audience, has moved to Radio 2.
Yes "4 watts per channel". If RMS that is quite average for Boombox. Of course once "Peak Music Power" was invented by advertising people they would have been able to say 4000W . There isn't a figure for the "Mini Disco" but I doubt if it was more than 40W per channel, which is still more than the amps the Beatles used to use.
I've got some highly efficient Frazier Speakers that came out of an ice rink, they used to be the standard for small stadiums, I think they max out at 15 watts but they are very loud.
That's what I love about P.A. speakers... Don't take much to drive, but can put thousand-dollar systems to shame. Lord knows the Electro-Voice 15x9" horns I borrowed can in handy fighting the boom-car craze, when it hit my local cruise scene. Just a 40w amp in-line, and the guy with the built van from the stereo shop was drowned-out!