Sanyo M7755
The M7755 is a 3-piece boombox from Sanyo, mid-late 1980's. It was available in multiple colors, including silver, blue, and even pink. It's approximately 18 inches long, and it has detachable 3-way speakers with 3.5" front woofers, 3" upper speakers, and a piezo tweeter in the little square grills. It has both Line In and Line Out RCA jacks. Power output is 2x3W max. For batteries, it takes 6 C-cells.