
The DR-550 was updated with a larger sound set as the Boss DR-550 MkII. It can store up to 8 songs with a maximum of 160 patterns per song.
Year Released: 1990
Number of Pads: 12
Polyphony: 12 notes
Preset Patterns: 64
User Patterns: 64
Tempo Range: 40 - 250 BPM
ROM Size: 48 sounds at 16-bit resolution
Power Consumption: 9v, 90mA or 6 x AA batteries
Weight: 0.51 kg including batteries
Dimensions: 188 mm x 157 mm x 41 mm
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