Moog Subsequent 37 (2017–)

At 16 lbs, it lands on your desk heavy. This is an analog synth and it feels like one.

Overview

The Moog Subsequent 37 is a semi-modular analog synthesizer built by Moog Music as a direct evolution of the Sub 37, introduced in 2017. It carries forward the lineage of the classic Model D with an all-analog signal path. It needs no patching to make sound, but it has 32 patch points for anyone who wants to go modular. It has an imposing size and an industrial metal case. Owners report a fat, classic Moog character, thick in the low end and singing in the highs, with a responsiveness that makes it feel alive under the fingers. It has quirks, though. Some users have noted technical issues, including noisy modulation wheels and occasional key responsiveness problems during live performance. In late 2023, Moog Music announced they had suspended production of the standard Subsequent 37. The CV variant was confirmed to have a limited production run of 2,000 units.

Specifications

Key Features

37-Note Keyboard with Velocity and Aftertouch

The Subsequent 37 has a 37-note keyboard that Moog describes as "37 synth keys", with an upgraded keybed noted for improved playability. The action is firm but fluid. Velocity and aftertouch are fully integrated into the modulation matrix, so pressing harder can make the sound swell, distort, or modulate in real time. The keys are not weighted, but they have a linear response that suits both stabbing basslines and legato leads. Some users have reported intermittent key response issues during performance, suggesting potential contact or firmware sensitivity.

Three Analog Oscillators with Audio-Rate Modulation

At the core of the Subsequent 37’s voice architecture are three analog oscillators. The first two offer continuously variable waveshapes—triangle, sawtooth, square/pulse, and a square sub—allowing for smooth transitions between timbres without stepping. This fluidity is a hallmark of Moog’s modern design, enabling evolving textures that feel organic rather than digital. The third oscillator operates from LFO to audio rate, functioning as either a modulation source or a full-fledged tone generator. This flexibility expands the synth’s sonic palette significantly, making it capable of everything from deep sub pulses to aggressive FM-like tones.

20Hz–20kHz Lowpass Ladder Filter with Overdrive

The ladder filter is tuned across the full audible spectrum. It gives the warm, rounded lows and crisp highs that defined the Model D. The Subsequent 37 goes further, because the filter can be overdriven, adding grit and harmonic complexity when pushed. The overdrive circuit is a central feature, and a twist of the drive knob takes the synth from pristine to filthy. The resonance is musical and stable, and the filter can self-oscillate without instability, which suits leads and effects.

64-Step Polyphonic Sequencer

One of the most praised parts of the Subsequent 37 is its 64-step polyphonic sequencer. Many monosynths limit sequencing to single-note lines, but this one allows up to six notes per step, so it can handle chords and evolving progressions. It has dedicated controls for step entry, transposition, and timing. It is often highlighted as a powerful creative tool. The arpeggiator offers multiple playback modes and can be paired with the sequencer.

32 Patch Points for Modular Integration

The Subsequent 37 works as a standalone instrument, but it is also deeply modular. The semi-modular design means it ships with internal normaling that makes a working synth out of the box, while patching opens up new signal paths and modulation routings. It has 11 modulation sources and 15 destinations. Users can route external LFOs, clock sources, or even other synths into it, which makes it a hub in a larger setup. The patch points are recessed 3.5mm jacks, standard for Moog's modern line, and compatible with most Eurorack cables.

High-Powered Headphone Amplifier

The built-in headphone amplifier is described as high-powered, and it can drive high-impedance headphones without external amplification. That helps for studio monitoring or silent practice. The output is clean and loud, and it preserves the full frequency response of the synth's sound.

Historical Context

The Subsequent 37 was introduced in 2017 as the successor to the Sub 37, with improved oscillators, filter, and modulation capabilities. It builds on the Sub 37 Tribute Edition, which was itself an award-winning release. It was priced at $1,499 at launch. That put it in the middle of Moog's modern lineup, between the semi-modular Mother-32 and Grandmother, and the flagship Matriarch and Moog One.

Collectibility & Value

The Subsequent 37 was listed at a retail price of $1,899 as of August 2022, and current market listings show pre-owned units selling around $1,649.95. No original MSRP documentation is available from the fact sheet, but third-party sources confirm the $1,499 launch price. Since Moog has suspended production, the synth has taken on a limited-edition status, potentially increasing its long-term collectibility. Maintenance can be a concern. Users have reported needing screen replacements and other spare parts, and while third-party replacements (like power cords) are available, official parts after discontinuation remain undocumented. Factory support is still available through Moog's general troubleshooting page for the Subsequent 37 and Sub 37.

eBay Listings

Moog Subsequent 37

$1,899

Moog Subsequent 37 Paraphonic Analog Synthesizer

$1,899

Moog Subsequent 37 Analog Synthesizer

$1,899

Moog Music Subsequent 37 37-Key All-Analog Paraphonic Synthe

$1,899

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• Moog Grandmother
• Moog Matriarch
• Moog Minimoog Voyager (2002-2015)
• Moog Minitaur
• Moog One
• Akai Ax73 (1986)
• E-mu Vintage Keys
• E-mu Vintage Pro
• Gates Kurzweil K2000
• Gates Kurzweil K2500