Ah, the great portable stereo wars of 1988…
I had a Hitachi 3-D Super Woofer’ with twin cassette (tape-to-tape recording 8) ) with just the one extra speaker, but almost the same as that one above. Then a mate got a Sharp X-Bass thing which was louder. 😥 Then someone else got something even louder. Then people started driving cars, and the Car Stereo Wars of 1989 began. Some kids went deaf. 😐
The arms race seems to have reversed in recent years, with kids preferring smaller and smaller (tinny and shit) ‘phone speakers or some shitty little bluetooth thing. And of course, playing crap music (we only ever played good tunes of course).
Mind you, you can get some fantastic portable speakers these days, play your ‘phone through them. And with some of the bigger ones, the sound absolutely pisses over those crap, huge, battery-eating monsters of yesteryear.