The PortaSound PS-400 was released at the same time as the Yamaha PS-300 and is the higher-end model of the pair.
Year Released: 1982
Keyboard: 44 keys
ROM: 10 sounds, 10 rhythms
Power Consumption: 2.3 watts
Dimensions: 621 mm x 152 mm x 43 mm
Weight: 1.6 kg
This keyboard has built-in 1.4-watt mono speaker(s).
Batteries: C x 6
Yamaha PS-300 and PS-400 Manual
Yamaha PS-400 PortaSound Retro FM Synthesizer (Matching Hardcase) ($239.47)
Vintage Yamaha PS-400 PS 400 Digital Synthesizer Keyboard Workstation 80s ($119.17)
Yamaha PS-400 Portasound ($175)
Yamaha PortaSound PS-400 44-key keyboard synth 80s EC ($157.37)
Yamaha Portasound PS-400 / vintage japan 80’s Black / With original case and power supply ($168.69)
Yamaha Portasound PS-400 80s - Used ($205.27)
Power Supply Replacement for YAMAHA PS-400 KEYBOARD ADAPTER UK 12V ($14.53)
Yamaha Portatone PSR-400 / PSR-500 Service Manual [Three Wave Music] ($20)
Yamaha PSR-400 ($159)
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