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MAM MB 33 - Image 1

MAM MB 33

RackmountAnalogMonophonic

Back in 1995, this rackmount beast from German maker MAM dropped as one of the earliest affordable TB-303 clones, delivering that squelchy acid bassline magic without the insane collector prices.

It's a pure analog monophonic synth with a single VCO pumping out mixable sawtooth and square waves—already a step up from the original 303's either/or choice—for fatter, more versatile tones across a 4-octave range. The 24dB/oct lowpass filter nails the classic cutoff and resonance screech, modulated by a dedicated envelope with decay and accent controls (velocity-sensitive via MIDI), plus an auto-slide function for those seamless portamento glides. Knobs are straightforward and hands-on: tune, cutoff, resonance, env mod, decay, accent, and distortion to grunge it up; it even has a 1/4" VCF input for external audio processing. MIDI In (DIN) handles note, velocity, and CC control for cutoff, res, and more, with CV/Gate ports for modular integration—all packed into a compact 1U rack format.

Over the years, players have praised its authentic 303 vibe and build quality, often calling it a workhorse for live acid sets and studio grooves, though some note the lack of patch memory as a quirk of its vintage design. If you're chasing raw analog basslines, this one's a timeless find.

Released

1995

Status

Discontinued

Synthesizer
Format
Rackmount
Type
Subtractive
Internal Battery
No
Voice
A/D
Analog
Polyphony
Monophonic
Oscillators
1
Oscillator Type
VCO (Voltage Controlled)
Voices
1
Filter
Lowpass, 24dB/oct (4-pole)
Envelopes
1
LFO
-
Effects
No
Expression
Aftertouch
No
Velocity
Yes
MPE
No
Additional
-
Software
-
I/O
Audio In
1x VCF input (1/4")
Audio Out
1x mono output (1/4")
Headphone
-
MIDI
In
MIDI Type
DIN (5-pin)
Ports
CV/Gate
Wi-Fi
No
Workflow
Arpeggiator
No
Sequencer
No
Mod Matrix
No
Memory
None
Measurements
Dimensions
-
Weight
-
Last updated Feb 26, 2026