Sanyo C20
The C20 is a very rare 3-piece boombox with turntable, from Sanyo. It weighs more than 30 pounds, and measures 68cm across, 28cm tall (handle down), and 22cm deep. The speakers have 12cm woofers and 5cm tweeters. According to the service manual it puts out 10 watts per channel continuous (into 3 ohms). That's when using AC. If you are using batteries, power output drops by 50%, to 5 watts per channel. The service manual can be purchased HERE.
Service Manual available from AnalogAlley.com