Aiwa TPR-930

The TPR-930 was a small boombox from Aiwa. It was made in 1974 and measures 15" x 8.5" x 4.25" (not including the carrying handle). It's a 9 volt (six UM-1 batteries) model that has 4 speakers (two 12cm speakers in front, and one oval-shaped speaker on each side). It has Loudness, twin VU meters, and a 4-band tuner with AFC. It also has both Line In and Line Out. According to the service manual, which is available HERE, its output power is 2x2 watts, which was typical of that time period.

Available versions include:
TPR-930H
TPR-930C
TPR-930F