The Sanyo C-7 is a distinctive boombox model that debuted in 1981, consisting of separate components for enhanced portability and flexibility. The system features individual metal cases for the tuner, tape deck, and power supply, contributing to its substantial weight of 11.2 kg (24.7 lbs) without batteries. Each component measures 215 mm in width, while the speaker boxes are 140 mm wide, connected by a sturdy metal bracket. Overall dimensions for the setup are 515 mm in width, 232 mm in depth, and 307 mm in height. It was marketed under different names in various regions, such as the MR-C1 in Japan and rebranded versions like the Siemens RS-806 and Yamaha PC-9. The output power of the C-7 reaches 8 watts per channel RMS at 2.5 ohms. The speaker system originally utilized 10 cm woofers that were later upgraded to 12 cm, paired with 4 cm tweeters, enhancing sound performance. This model is a unique representation of the era's audio technology, combining functionality and style.
