GE 3-6035A
The 3-6035A was a 4-speaker boombox from General Electric, year 1983. It has a very unconventional design, because it's very low-slung and thin. This makes it very easy to carry. The light weight helps too (12.0 lbs). But it punches above its weight in terms of sound output. It goes loud, and the sound is very clean and detailed. There are many larger and heavier 80s boomboxes that would get smoked by it. GE says it makes 5 watts per channel with AC operation, and 3.7 watts per channel with battery operation (at 10% total harmonic distortion). That might not sound like much, but that's real watts, not fake "music power" watts. It uses a Hitachi HA1392 amplifier chip, the same one used in the Sharp GF-777 (except the Sharp has 2 of them, not just one).
Pictures courtesy of Boeingman777