MAM FreeBass 383

FreeBass FB383 Image

Another monophonic analog TB-303 clone! The FB 383 is a re-packaged version of the MB 33 with a special front-panel design as part of an exclusive deal with Turnkey music shop UK. Just like the MB 33, the FB 383 offers all the same basic sounds and controls as the original TB-303 in a 1-unit rack module. It has just 8 basic knobs for the same basic 303-like control: tune, filter cutoff, resonance, envmod, accent and decay. Unlike the 303 however, the oscillator can be varied from sawtooth to square from a knob on the front! Also featured is an external audio input to the filter for processing other elements.

The FB-383 makes a decent 303 sound however it lacks too many functions that should be there. Controls do no send or receive MIDI and there is no memory for storage of your own sounds. However, at its low price tag, you get what you pay for and for a quick and easy 303 the FreeBass comes in handy!

Lookup MAM FreeBass 383 Prices

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15 Visitor comments
May 5, 2010 @ 7:02 am
There are some absolutely awesome "circuit bending" mods for this - I have one sat in my rack at home. Sure, it sounds great as it is and does a passable 303 impression, but circuit mods add VCF I/O switch (really handy as you don't have to reach round the back all the time to unplug the 1/4" jack socket), VCO overdrive, resonance boost, FM circuit, CV in, Fiter Lock (stops the ADSR shape of the filter being applied to an external input), front panel power switch and BLUE front panel LED's (WOOHOO!!!)

Without a doubt the absolute best £115 you will ever spend and makes the original TB303 sound absolute pants by comparison. I totally recommend this to anyony who has a Freebass. Honestly, go do it and no, I don't get commision, just a very happy musician.

Link is at:

Enjoy :oD
April 22, 2010 @ 5:44 am
I bought one of these from ebay for £90, and I will never let this badboy go. Granted it's not quite as cool as owning the real deal, however the sound is pretty damn close. I used to swear by Audiorealism's ABL2 soft synth version, but after finding the 383, there is no comparison. Love it!
July 10, 2009 @ 8:15 pm
I just got one of these off ebay for under 100, and I have to say after owning a many a synth this is a great little bass machine. I have never owned a real 303, but this thing kicks but. I run it through my Marshall Stack and it sounds wicked.
Jim Wicked
January 29, 2009 @ 12:44 pm
They sound decent enough. In contrast to a real 303, the cutoff doesn't have near the range of a real one, and the resonance is limited, so it doesn't get quite the same squelch that a 303 does. Not a great replacement fora 303, but they do well enough on their own. One thing that you have to be leery about though is that the build quality on these things is horrible. I'm on my second one right now and it's also going down the tubes. The VCO died on my first one. On the one I've got now, it loses MIDI note information constantly, the VCO occasionally stops responding, and it won't tune up to C and so it has to be played a semitone higher in order to stay in the right scale as other synths (the autotune button has no effect.) However, I've since relegated it being a component of my modular, and the filter has served me well in this regard, so it can still be useful.
November 30, 2008 @ 2:45 am
great little bass machine, as fat as a fat lady's ass.. the sound is all there. of course, you need to have a control synth to play it, but it is indeed a fine addition to any gear setup
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Rated 3.58 (191 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - Monophonic
  • Oscillators - 1 VCO
  • LFO - None
  • Filter - Cutoff, Resonance, EnvMod
  • VCA - Accent, Decay
  • Keyboard - None
  • Memory - None
  • Control - MIDI
  • Date Produced - 1996
  • Resources & Credits
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