MAM MB 33 / MB 33 mkII

3.5 (9)

1 Review

Find out who is using MAM MB 33 / MB 33 mkII

1 community setup

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Page last updated Jun 22, 2026

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MAM MB 33 II Features :

OSCILLATOR WAVEFORM : Sawtooth, Square wave, Sub-oscillator TUNE : Fine pitch adjustment (+/- 1 semitone) FILTER: 18 dB low-pass filter AUTOSLIDE: ON/OFF switch SUB MIX: Ratio of sub-oscillator (square-wave) to sawtooth/square-wave ENV MOD: Amount control for modulating filter CUTOFF: Upper cutoff frequency of the VCF RESONANCE: Generates resonance in the cutoff frequency range ACCENT: Amount of signal to modulate the filter and amplifier EDIT MODE: Normal/Move switch ENV PWM: Intensity of the square-wave pulse width modulation DECAY: Envelope generator decay time VOLUME: Master/headphone output level control MASTER DISTORTION: Intensity of distortion effect

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MAM MB 33 / MB 33 mkII.

Features and functionality

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The MB33 mkII includes onboard distortion and can send/receive knob movements as MIDI data, enhancing its integration with software setups.
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Every MB33 Retro synthesizer sounds uniquely different due to component tolerance variations, enhancing its analog appeal.
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Software and compatibility

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The MB33 Retro model reportedly offers improved MIDI syncing capabilities, particularly beneficial for users working with software MIDI.
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Comparisons

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The MB33 Retro is noted for its compact desktop format, contrasting with the larger rack-mounted older MB33 models, which could affect portability and space usage.
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Use cases and applications

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Owners using hardware like Beatstep and Rhythm Wolf report reliable MIDI syncing with older MB33 models, whereas software users might prefer the newer Retro model.
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Build quality

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The MB33 has oak end cheeks, allowing it to stand at an angle, adding to its aesthetic and functionality.
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Mods and upgrades

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Users recommend using a distortion/drive pedal, like the MS50G, for added character and oomph that the onboard effects may lack.
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3.5 out of 5

Based on 1 Review and 9 Ratings

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bubbajones

1312

about 10 years ago

not quite a 303 but a nice monosynth in a 1U

The MB 33 is a rack-mounted TB-303 clone released in the mid-nineties by German synth maker MAM (Music And More). It's basically identical to the Freebass 383 (which had a different front-panel design). It is a true analog monophonic bass synthesizer with MIDI implementation so you can create 303-like bass lines from your sequencer. Its single VCO offers the same two basic waveforms as the TB-303: a sawtooth and square wave. But in the MB 33 they can be mixed together for a more interesting tone than the 303 could originally produce.

Roles:

Guitarist Bassist Music Producer

Genres:

Electronic Electronica

Artist usage

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Billy Corgan

Singer, Guitarist

The Smashing Pumpkins

Verified via reverb.com

Billy Corgan is confirmed to own a MAM MB33 II Analog Bass-Synth, as evidenced by a listing on Reverb.

Kebu

Keyboardist, Composer

Verified via Iheartsynths

In the interview for I Heart Synths, Kebu shows his rig, which also shows the MAM MB33.

Cinthie

Music Producer, DJ

Verified via MusicTech

That's none other than the mk2 MB33 just below the bright yellow Emu Orbit in the rack photo of this MusicTech article... who would keep such a thing? I love it.