Boss DR-660 Dr. Rhythm (1992)

Sixteen velocity-and-aftertouch pads, 255 sounds, and a battery compartment - the Dr. Rhythm that did the work before the computer took the job.

Overview

The DR-660 is a digital drum machine from Boss, made in Japan and introduced in 1992. It carries the Dr. Rhythm name. It is the model a lot of people quietly reach for when Boss rhythm boxes come up - a drum machine that behaves like a drum machine rather than a menu system with pads bolted on.

The core of the thing is the pad grid: sixteen pads, velocity and aftertouch sensitive, which is a meaningful distinction on a box from this era. Aftertouch on a drum pad means you can lean into a hit and have the sound respond to pressure rather than just the initial strike. Under those pads sit 255 percussion sounds, editable on a per-sound basis for volume, pitch, decay, panning, and effects. That is a lot of latitude for a box of this class. The factory kits are organized into Pad Bank A and B variations, and the deeper you go into the edit pages, the less the machine sounds like a preset library.

Pattern memory runs to 250 patterns, with 100 preset rhythm patterns shipped from the factory. Stereo outputs are on board, along with built-in effects, and the whole thing is programmable and battery powered. That mattered in 1992, and it still helps anyone who wants to sketch a beat on a couch without hunting for an outlet. It is a digital instrument.

One caveat: the dating is not perfectly clean. The overwhelming majority of sources place the DR-660 at 1992, and that is the figure used here. At least one secondhand listing describes a unit as "1997 Made in Japan," which conflicts with the 1992 date. Given how consistently 1992 appears elsewhere, the later date is most likely a listing error rather than a production revision. It is the kind of discrepancy that turns up on a machine that changed hands for a decade.

Key Features

Sixteen Velocity and Aftertouch-Sensitive Pads

Velocity sensitivity was common enough by 1992. Aftertouch was not, particularly at this price point. The pads read both how hard you hit and how long you lean, so a snare can be struck softly and then pressed to open up, and the machine tracks it. Owners consistently describe the interface as intuitive and the pads as responsive. That sounds like faint praise until you have spent an evening menu-diving between every hit on some other drum machine. The DR-660 does not make you do that.

255 Percussion Sounds, Fully Editable

Every one of the 255 onboard sounds can be edited for volume, pitch, decay, panning, and effects. That is five parameters per voice, applied across the whole kit, enough to reshape a factory sound so it sits properly in a mix. The sounds are sample-based, and the DR-660 shares some of its sample content with other models in the Dr. Rhythm line. That is common practice at Boss, so the box is not as isolated from its siblings as the model number suggests.

Factory Pad Bank A and B Kits

The factory kits are arranged into Pad Bank A and B variations, giving two complete setups of pad assignments out of the box. Rather than reprogramming sixteen pads to get from one kit to another, you flip banks. The per-pad control structure means the bank assignment is a starting point, not a cage.

100 Preset Patterns and 250 Pattern Slots

The machine ships with 100 preset rhythm patterns and offers 250 pattern locations in total. The presets are a starting vocabulary, a way to hear what the box wants to do. The 250 slots are generous enough that most users never bump the ceiling.

Stereo Outputs, Built-In Effects, and Battery Power

Stereo outputs and onboard effects mean the DR-660 can go straight into a recording chain or a PA without a pedalboard of outboard gear in between. Battery power means it can go anywhere else. Self-contained, portable, and fully programmable - that combination made this class of machine the default tool for drum programming in the early 1990s, before a computer in the corner of the room became the obvious answer.

Historical Context

The DR-660 arrived in 1992, when home recording was still largely a hardware proposition. A contemporary magazine listing from that year paired it with the DR550 MkII as the two Boss drum machines of note (Music Technology, October 1992). It was built for musicians assembling drum tracks with a rack of gear and a four-track, not for someone with a DAW and a mouse.

Within the Dr. Rhythm family, the DR-660 shares some of its samples with other models in the line and lacks some of the additional features of later versions - most notably the bass capability that arrived with the DR-670. That absence is the single most common criticism leveled at the DR-660 by people who own several Dr. Rhythms. The counterargument, made just as often, is that the DR-660 is the most intuitive of the bunch, and that the missing bass section is a small price for an interface that gets out of the way. One widely repeated assessment from a long-time Dr. Rhythm owner puts it bluntly: the DR-660 is the best of the line, and the ease of use is the reason.

The machine is often described as underrated - a drum machine from the 1990s that never got the retrospective attention some of its contemporaries did, but that stayed in service with producers and sound designers long after its era.

Collectibility & Value

Prices are modest and have been for years. Secondhand listings currently sit around $221 at the top of the range, with working units changing hands closer to $150 on eBay - a figure one long-time user called cheap for what the machine does. The DR-660 is a working tool that happens to be old, and it is priced accordingly.

The known maintenance issue is conductive coating deterioration inside the case. Boss used a conductive coating on the interior, and over decades it can break down. That produces intermittent behavior and sends owners hunting for a service manual. The documentation exists: a service manual with electronic schematics (English and Japanese) circulates, along with the owner's manual, and units described as repaired and working well are regularly listed. Anyone buying one should expect to open it eventually.

User reception has held up reasonably. Aggregated ratings sit around 4.2 out of 5, with a small but steady stream of reviews and a notable number of professional artists still citing it. That is a better long-term verdict than most 1992 drum machines can claim.

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