Iconic Boss DR-55 Dr Rhythm 1979-1980

True Iconic music history:
This is the real first "Sisters Of Mercy" Doktor Avalanche...

unfortunately too late

Technical specifications

42 year old vintage and iconic early drum computer (1979-1980). Very hard to find collectors item.

The Boss DR-55 became very famous and notorius as the gloomy, mysterious fourth band member of the Leeds based English rock band The Sisters Of Mercy in the early 80's. The DR-55 was called "Dr Avalanche" by the band and defined the typical sound and gloomy industrial atmosphere the band got famous with.

The DR-55 Dr. Rhythm was released in 1980 and was one of the first step-write-style drum machines. It was the first rhythm machine in successful Dr. Rhythm Series from Boss.

The DR-55 can store up to six 16-step drum patterns plus an additional two 12-step patterns. There are 4 sounds in the drum machine which include Snare Drum, Kick Drum, Rim Shot and Hi-Hat. You can globally adjust the Volume, Tempo, Tone and Accent for the drum sounds.


BOSS (product of Roland)


DR-55 Dr. Rhythm





Famous users

DR-55 was used by The Sisters Of Mercy (famous "Dr Avalanche"), Depeche Mode (as their first "drummer" on earliest live gigs), New Order, The Cure, The March Violets, Soft Cell, Thomas Dolby, …

Main features

* Memories: 6 memories for 16 step patterns, 2 memories for 12 step patterns

* Variations: A, B, AB per pattern

* Controls: tempo, tone, accent and volume control pots

* Sounds: 4 analogue sounds : base drum, snare drum, rimshot and a preset closed hi-hat pattern that played 8th, 12th and 16th note patterns

* Play / write

* Quick manual on the back

* External clock trigger and foot switch input

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