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M5

Semi-ModularAnalogMonophonic

Picture this: a massive desktop beast hand-built by Scottish synth wizard Ken Macbeth in 2005, evoking the spirit of an ARP 2600 but cranking everything up to eleven with pure analog power and zero digital interference. It's the kind of semi-modular monster that invites you to patch cables and twist knobs for hours, delivering that raw, untamed sound you can't get from software.

At its core, three voltage-controlled oscillators dish out classic waveforms with sync, FM, and pulse-width mod on the squares, feeding into dual filters—a creamy 24dB/oct ladder lowpass and a versatile 12dB/oct multi-mode unit handling lowpass, highpass, bandpass, notch, both self-oscillating. Two snappy ADSR envelopes, a pair of LFOs with ramp, triangle, and square shapes (plus sample & hold from noise or LFO2), four VCAs including voltage-controlled panning for stereo output, and built-in spring reverb plus ring mod round out the signal path. A mod matrix and CV/Gate patch points make it endlessly tweakable on its sprawling panel crammed with real-time sliders and jacks—no menus, just hands-on control.

Synth heads have long praised its huge, brash tone that slices through mixes like a Moog on steroids, with excellent tracking over five octaves and vintage fatness for everything from classic leads to modern aggression. Sure, it's monophonic and pricey as a handcrafted gem, but that's part of its shy allure among the elite analog greats.

Released

2005

Status

Discontinued

Synthesizer
Format
Semi-Modular, Desktop
Type
Analog, Subtractive
Internal Battery
No
Voice
A/D
Analog
Polyphony
Monophonic
Oscillators
3
Oscillator Type
VCO (Voltage Controlled)
Voices
1
Filter
Lowpass, Highpass, Bandpass, Notch, 12dB/oct (2-pole), 24dB/oct (4-pole), Ladder
Envelopes
2
LFO
2
Effects
Spring Reverb, Ring Mod
Expression
Aftertouch
No
Velocity
No
MPE
No
Additional
-
Software
-
I/O
Audio In
-
Audio Out
-
Headphone
-
MIDI
-
MIDI Type
-
Ports
CV/Gate
Wi-Fi
No
Workflow
Arpeggiator
No
Sequencer
No
Mod Matrix
Yes
Memory
None
Measurements
Dimensions
-
Weight
-
Last updated Feb 26, 2026