Yamaha PS 400 Keyboard (1982)
Serial No. 028715
This is a functional demonstration for a listing on Ebay.
The PS400 is very uncommon. Its loaded with mechanical switches instead of buttons.
4 volume sliders and 1 tempo slider.
It has the classic 80’s (toy) keyboard analog sound; much like a Casio MT-100.
This one sports excellent build quality.
Features
10 Rythms w/ auto-accompaniment, filli-ns, and variations
10 Sounds with Sustain Switch
Rotary transpose switch
Chord sequencer
4 Volume sliders
Duet switch.
Audio out
Runs on 9v DC power supply or batteries