Although released a few years after the Yamaha RY30, the RY20 is considered a notch below it because the RY30 is more programmable. However, the RY20 has more than three times as many sounds in ROM.
It uses a 3v lithium battery for its internal memory. The battery is soldered to the circuit board and a common modification is to replace the battery with a standard CR2032 battery holder when replacing it.
Year Released: 1994
Number of Pads: 12
Polyphony: 28 notes
Preset Patterns: 50
User Patterns: 50
User Songs: 50
Preset Drumkits: 20
User Drumkits: 20
Tempo Range: 40 - 250 BPM
ROM Size: 300 waveforms
Effects: reverb and delay
Weight: 0.7 kg without batteries
Dimensions: 240 mm x 176 mm x 48 mm
YAMAHA RY20 Rhythm Programmer Digital Drum Machine w/ 100-240V PSU ($99.99)
Yamaha RY20 - Grey Rhythm Programmer ($95)
Yamaha RY20 w/ Universal power supply Rhythm Programmer 90's Drum Machine MIDI ($65)
Power Supply Replacement for YAMAHA RY20 DIGITAL DRUM MACHINE ADAPTER 12V ($10.90)
LASE Compatible Power Supply for YAMAHA RX-5, RX-7,DD3/5/6, RY20/21/21L,10,20, DX27, DX100 . ($19.99)
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