The PortaSound PS-1 was released at the same time as the PortaSound PS-2 and PortaSound PS-3 and is the low-end model of the line.
It's an analog keyboard that generates sound using filtered square waves.
Year Released: 1980
Keyboard: 32 mini keys
Polyphony: 8 notes
ROM: 4 sounds, 4 rhythms
Power Consumption: 6 watts
Dimensions: 43 cm x 14 cm x 6 cm
Weight: 1.2 kg
This keyboard has built-in 2-watt mono speaker(s).
Batteries: 6 x C
User Demo Videos
Yamaha PS-1 and PS-2 and PS-3 Manual
Items for Sale on Reverb
Yamaha PS-1 PortaSound Keyboard and Case ($65)
Yamaha DTX700 DTP903, DTP904, WS-860A(x2) PS-940, MAT1 ($3,699.99)
Yamaha DTX900M, DTP903, DTP904, WS-860A(x2) PS-940, MAT1 ($4,488.99)
Yamaha PSR E453 Digital Keyboard Pack 1 ($453.54)
Yamaha PSR-E363 Electronic Keyboard Pack 1 ($274.33)
Yamaha PSR-E363 Electronic Keyboard Pack 1 ($264.68)