Aiwa TP-20 vs Aiwa HS-PX1000 or HS-PX70 what size differences are there? | Walkman Cassette Player

This is a short video, but the extended version will follow here:    • Aiwa HS-PX1000/ HS-PX70 Vs. Aiwa TP-2...   Aiwa's evolution from this Powerful Cassette Recorder TP-20 Mono launched in 1980 and the Top model built in year 1992 Aiwa HS-PX1000 and HS-PX70 with voice navigation. What Mono sound was like for playback (variable speed) and recording build in 1980.
Aiwa TP-20 exclusively on the Japanese markets this model is large and weighs 3.3 lbs/1.5Kg and I test with AA/R6 3 X 1.5V batteries and him works playback and recording!
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