U-20 (1989-1992)
Owner's Manual: https://www.roland.com/us/support/manual_archive/
SOUND GENERATOR:
RS-PCM
MAXIMUM POLYPHONY:
30 voices
INTERNAL MEMORY:
Setup: 1
Keyboard Patches: 64
Chord Sets: 8
Sound Patches: 64
Timbres: 128
Rhythm Sets: (64 keys, B1 - D7): 4
RAM Card:
Setup: 1
Keyboard Patches: 64
Chord Sets: 8
Sound Patches: 64
Timbres: 128
Rhythm Sets: (64 keys, B1 - D7): 4
DISPLAY:
2 line, 24 character, backlit
OPTIONS:
M-256E RAM Card
SN-U110 Series PCM Card
Foot switch: DP-2, DP-6
Expression Pedal: EV-5, EV-10
DIMENSIONS:
38-3/4 X 12-1/16 X 3-1/4
WEIGHT:
22 lbs