Moog Slim Phatty

Moog Slim Phatty Image

For those who were excited to see a new synth engine from Moog in 2011, the Slim Phatty was a bit of a disappointment. But for those who had enough keyboards cluttering the studio and just wanted that big juicy Moog sound, it was most welcome.

The Slim Phatty has the same engine as the much-loved Little Phatty but in a rack-mountable unit (3U) that can also be used as a tabletop unit, made oh-so-retro-chic with the optional wooden end caps. The Little and Slim Phatty share the same firmware so any updates can be made to either one. The Slim Phatty was the first Moog device with USB, which not only makes those updates easier but also makes integration into a modern studio very simple. For those who have dreamed of owning a polyphonic Moog but can't afford a Memorymoog, the Slim Phatty can also be chained with other Phatty devices for multi-voiced Moog richness.

Moog left off the Little Phatty's rather heavy case, the 37-key keyboard, and the mod and pitch wheels, so what remains is a lightweight and even portable version of the Little Phatty's main engine, fully compatible with MIDI, DAW, or CV-based studios. The control panel is a bit smaller than the Little Phatty's but still very comfortable and easy to use. Not quite knob-per-function, but nevertheless very straightforward.

As for the sound, it's exactly the big, thick oscillators and the rich wet filter that players expect from a Moog. Modulation is limited, especially compared to more modern mono-synths, but it was made to be compatible with the Moogerfooger line, the MP-201 and the CP-251 for semi-modular flexibility. Later firmware updates added velocity sensitivity for volume, alternative scales, LFO reset, and other features, making the Slim Phatty a perfect choice for players who want the all-analog Moog sound with the flexibility of modern synths.

Moog Slim Phatty Image

In 2013 the Slim Phatty, which had a black faceplate to match the Little Phatty, received an aesthetic makeover to match it to the new metallic-white Sub Phatty.

Lookup Moog Slim Phatty Prices

The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

Related forum topics


Are you looking to buy or sell a Moog Slim Phatty? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

15 Visitor comments
October 2, 2013 @ 4:26 am
- Continues from last post -

Fitting it in a mix with other analogue drum machines and synths - No problem. I highly recommend this synthesizer if you need a bass. Some of the newer moog tabletops offer great sounds as well but not good for alround melodies and higher requencies. I have always been puzzled by the moog sound and now i finally understand what it's all about
October 2, 2013 @ 4:25 am
I have owned a lot of different synth, most of them sold to fund a modular, recently I bought the white SP, and it a very good synth considering size. The envelopes are very snappy, the ovrdrive sounds huge and the continuously variable waveforms are a joy to play with. The midi implementation works flawlessly on the white version. It's good for soft and aggresive bass sounds, I haven't used it a lot for melodies.
June 8, 2013 @ 6:06 am
@freeze that's good to hear - although I wasn't alone as looking around the web there were a lot of people who had the same issues I had so maybe there was a flawed early batch. Either way it's now in the CV/Gate family along with my Odyssey, Prodigy, CS10, and Kitten and feeling right at home. Great synth.
May 11, 2013 @ 5:01 am
Didn't really like this synth. Everything I did with it sounded the same and I found it awkward to fit in the mix. Spent way to much time tweaking to try and get bass sounds to fit in the mix. I always had problems trying to get the basses to work well with kik drums. But if you like the Moog thick sound then I'm sure you can get it to work in your music better than I could. It was the samey sound which saw me sell it. All those parameters and I ended up making the same sound. I never got that Wow moment I have had with other synths. No happy accidents. I felt it was a synth for synth solos
April 3, 2013 @ 5:23 am
Nice bass, Works great for me
VSE Rating


User Rating

Rated 3.58 (299 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
  • Multitimbral - No
  • Oscillators - 2 VCOs, both 16', 8', 4', 2'
  • Waveforms - Continuously variable: triangle through saw and square to narrow pulse.
  • LFO - LFO with triangle, square, sawtooth, ramp
  • Modulation - Mod Source: LFO, Filt. EGR or Sample and Hold, and Osc. 2 or Noise. Mod Destination: Pitch, Osc. 2, Filter, Wave.
  • Filter - 1 Low Pass VCF: 24dB/Oct Moog Ladder with overload and ADSR.
  • Envelope - 1 Volume amp with ASDR
  • Effects - None
  • Sequencer - None
  • Arpeggiator - Up, down, ordered. MIDI-syncable
  • Keyboard - None
  • Memory - 100 presets, all can be overwritten by user
  • Control - MIDI In/Out/Thru; USB; and CV: Pitch CV In (1 V/Oct) Filter CV In Volume CV In Keyboard Gate In
  • Weight - 5.75 Lbs (2.6 kg)
  • Date Produced - 2011
  • Resources & Credits
  • Review by GuyaGuy.

    Reviewed February 2013.

Errors or Corrections? Send them here.