Aiwa M-501
The M-501 was a mini component system offered by Aiwa during the 1980's. It came with an infrared remote control. Each component had its own model number, as follows:
Cassette Deck: L50
Amp: A50
Tuner: R50
Preamp: C50
Remote Control Receiver: R300
Power amp: P50
Audio Program Timer: MT-50