Where I was bought up, our local church youth group was the place to show off your new boomer. A proper "arms-race" developed across the 80s.
A mate of mine was bringing along that GF5454 & was rather annoyed when I turned up with my new Philips D8134 & it sounded better.
Then he got a bigger Sharp (GF5858) which was louder than my Philips & he was once again top dog. It even had a cool flashing LED thingy.
When I bought my Hitachi 3D7, he gave up