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
Boss Boss DR-550 MKII DR.Rythhm Drum Machine (Edison, NJ) ($99.99)
Boss DR-550 Dr. Rhythm 1989-1991 - Black ($100)
Boss DR-550 Drum Machine ($99.99)
Boss Dr. Rhythm DR-550 ($116.18)
Boss DR-550 MkII. 808/909 sounds ($190.62)
Boss DR-550 Dr. Rhythm 1989-1991 - Black ($85)
Vintage Boss DR-550 MkII Dr. Rhythm DR550 Drum Machine ($169.99)
Boss DR. RHYTHM DR-550 1989 - black ($154.07)
Set of two Boss DR-550 Dr. Rhythm 1989-1991 - Black ($112.80)
Boss DR-550 Dr. Rhythm - Black ($84.74)
Boss DR-550 MkII Dr. Rhythm ($127)
Boss DR-550 Drum Machine ($89.99)
Boss DR-550 ($169.19)
Boss DR-550 MkII Dr. Rhythm 1992-1999 - Black ($145.51)
Boss Dr. Rhythm 550 MKII 1990 - Black ($225)
Boss DR-550 parts - tempo LED - part no. 15029324 ($5)
Boss DR-550 parts - 12MHz crystal - part no. 15299128 ($10)
Owner's Manual for Boss Dr. Rhythm DR-550 1984 ($15.82)
Boss DR-550 parts - Midi din socket - part no. 13429642 ($15)
Boss DR-550 parts - tape save/load socket - part no. 13449428 ($10)
Boss DR-550 parts - volume potentiometer - part no. 13279966 ($15)
Boss DR-550 parts - power switch - part no. 13159168 ($10)
Boss DR-550 parts - flex cable - part no. 23485252 ($5)
Boss Doctor Rhythm Drum Machine DR-550 2000 ($200)
Power Supply Replacement for Boss Dr-550 Mkii Adapter Uk 9V ($14.28)
Power Supply Replacement for Boss Dr-550 Adapter Uk 9V ($14.28)
Boss DR-550mkII ($213.18)
Boss DR-550MKII Owner's Manual ($25)
Boss DR 550 Mk2 Booklet en français ($11.28)
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