The PSR-11 is a 2-operator FM keyboard based on the Yamaha YM3812 OPL chip.
Year Released: 1986
Keyboard: 49 keys
Polyphony: 9 notes
ROM: 16 sounds, 16 rhythms
Dimensions: 863 mm x 236 mm x 71 mm
Weight: 4.7 kg
This keyboard has built-in 2.5-watt mono speaker(s).
Batteries: D x 6
Yamaha PSR-11 Portatone Service Manual 1986 ($15)
Power Supply Replacement for YAMAHA PSR-11 KEYBOARD ADAPTER UK 12V ($14.26)
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