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Matrix 6R Rackmount Analog Synthesizer - Image 1

Matrix 6R Rackmount Analog Synthesizer

RackmountHybridPolyphonic

Back in the mid-80s, this rackmount gem captured the essence of Oberheim's legendary analog warmth in a compact 3U form, blending digital control for rock-solid tuning with pure analog heart—think DCOs driving that classic OB-series vibe without the bulk of a keyboard.

At its core, each of its 6 voices packs two analog digitally-controlled oscillators (saw, triangle, pulse with PWM and sync), feeding into a resonant 24dB/octave CEM3396 lowpass filter, dual VCAs, three DADSR envelopes, two LFOs, and dual ramp generators for dynamic modulation. The star is its matrix modulation system, letting you route sources like velocity, aftertouch, pedals, levers, tracking generator, or LFOs to damn near anything for wild, Xpander-like patches. Duo-timbral operation supports splits or layers, with 100 onboard patches, full MIDI (IN/OUT/THRU), pedal inputs, and stereo outs—all accessed via a membrane button panel, VFD display, and front volume knob on its 19-inch rack chassis weighing around 8kg.

Players love its punchy basses, shimmering pads, and versatile textures that echo the pricier Matrix 12, earning fans from Orbital to Tangerine Dream. That said, the menu-diving edit interface via membrane keys can feel fiddly at first, especially if you're after knob-per-function immediacy. Still, once dialed in, it's a studio staple for vintage analog magic.

Released

1986

Status

Discontinued

Synthesizer
Format
Rackmount
Type
Subtractive
Internal Battery
No
Voice
A/D
Hybrid
Polyphony
Polyphonic
Oscillators
2
Oscillator Type
DCO (Digitally Controlled)
Voices
6
Filter
Yes
Envelopes
3
LFO
2
Effects
No
Expression
Aftertouch
No
Velocity
-
MPE
No
Additional
-
Software
-
I/O
Audio In
-
Audio Out
1 stereo
Headphone
0
MIDI
In, Out, Thru
MIDI Type
DIN (5-pin)
Ports
-
Wi-Fi
No
Workflow
Arpeggiator
-
Sequencer
-
Mod Matrix
Yes
Memory
100 patches, 50 splits
Measurements
Dimensions
-
Weight
-
Last updated Mar 17, 2026