Sanyo M-X920
Big, shiny and heavy......the Sanyo MX920 is a ghettoblaster dressed to impress. Built in 1980, it measures 25.5 inches long, 12.5 inches high, and 7 inches deep. It weighs 21 lbs dry, or 24 lbs when filled with 10 D-cell batteries. It features 18cm woofers, 5cm tweeters, a flywheel-weighted tuner knob that turns just as smoothly as the ones on hifi home receivers, and a cool green tuner light with a button lock. The tape deck is a robust mechanical logic design with lots of heavy zinc-plated metal parts.
The amplifier consists of two Rohm BA532 chips, the same chips used by the Sanyo M9998. How many watts does it make? Well keep in mind that Sanyo could say whatever they wanted to, there was no law against inflating the numbers. Also it depends on which document you're reading:
USA service manual.............................2x16 watts "Music Power" @ 2.5 ohms
Sanyo Japanese catalog.......................2x16 watts "Music Power"
Sanyo Japanese advertisement.............2x10 watts EIAJ/DC (this probably means when using batteries)
Sanyo Italian advertisement.................2x12 watts
European service manual (M-X920LU)....2x13 watts @ 2.5 ohms
The service manual can be purchased HERE. In summary, the M-X920 is a very heavy, high-quality model that's fun to look at because of all the shiny trim. The only area of concern is the fact that Sanyo tuner chips often go bad, causing stations to drop out of stereo after only 30 seconds, or never achieve it at all. So make sure to ask the seller if it can hold stereo on the majority of stations.
Note: The "K" model of this boombox (M-X920K) has a silver tuner dial instead of black. It also has an extra band for shortwave, as well as a fine-tuning knob.