Aiwa TPR-920
The TPR-920 boombox was introduced in the year 1977. It is 445mm wide and has two 12cm speakers. Power output is 2x3.6W RMS maximum, and 2x2W minimum from 70 to 10,000 Hz @ 10% THD. The model number variations included TPR-920C, TPR-920F, TPR-920H, and TPR-920G. In the picture below, it is shown with the optional DM-511P microphones. You could also buy the LC-920 carrying case with shoulder strap. The service manual can be purchased HERE