Welcome to my Moog Subsequent 25 Review. This compact analog synth has been one of my favorite modern Moog instruments for a simple reason: it is an absolute monophonic beast. Huge basses, aggressive leads, gritty sequences, smooth classic tones—the Subsequent 25 delivers the kind of immediate analog power that makes you want to keep playing.
There is one important thing to know before going any further. Moog officially discontinued the Subsequent 25 in March 2025. I was genuinely sorry to see it disappear from the current lineup, but that does not make the instrument irrelevant. Plenty of units are still available on the used market, and many musicians are now wondering whether buying one second-hand still makes sense in 2026.
After spending years with its predecessor and a huge amount of time programming the Subsequent 25 itself, I think it absolutely deserves a proper retrospective review.
Moog Subsequent 25 Review: Sound and Character
At its core, the Subsequent 25 is a compact performance synth built around two analog oscillators, a sub oscillator, noise, the classic Moog ladder filter, dual envelopes, modulation and the MultiDrive circuit. On paper, it looks relatively simple. In practice, it can sound enormous.
Bass is where the instrument immediately feels at home. The low end is deep and authoritative, but what I particularly like about the Subsequent 25 is how defined that weight feels. It can produce huge sub-heavy tones without automatically turning everything into a blurry wall of low frequencies.
- Deep and powerful Moog basses with serious low-end weight
- Aggressive analog leads and driven mono sounds
- Punchy sequences, plucks and rhythmic patches
- Smooth vintage-style tones and warmer melodic sounds
If you want to hear its bass side first, this is probably the perfect place to start:
From Sub Phatty to Subsequent 25
This comparison is especially important to me because I used the Moog Sub Phatty in my studio almost every day for several years. I became extremely familiar with its sound, response and workflow, so when I later received the Subsequent 25, I had a very clear reference point.
And I quickly understood that this was more than a cosmetic revision.
The fundamental character is unmistakably related to the Sub Phatty, but to my ears the Subsequent 25 feels more refined and more defined. The updated gain structure and additional headroom give you more room to move between clean, powerful analog tones and heavily driven sounds while retaining the familiar character that made the Sub Phatty so enjoyable.
If you want a direct reference for the character I became so familiar with, here is my 10-minute Moog Sub Phatty sound demo:
And here is a much longer 30-minute Subsequent 25 demo I recorded later, which makes for an interesting comparison between the two generations:
The instrument itself also feels extremely solid, and the keyboard deserves a special mention. For a compact 25-key performance synth, it is genuinely enjoyable to play. That matters because the Subsequent 25 is not something I see purely as a studio sound module—it is a real performance instrument.
Duo Mode: More Than a Traditional Mono Synth
One of the most interesting upgrades over the Sub Phatty is Duo Mode. The Subsequent 25 is still best thought of as a powerful mono synth, but its two-note paraphonic architecture allows Oscillator 1 and Oscillator 2 to follow different pitches.
It is important to distinguish this from true two-voice polyphony because both oscillators still share the same filter and amplifier path. In practice, however, Duo Mode opens up a completely different side of the instrument. You can create intervals, drones, unusual melodic textures and spacious patches that would not be possible on the Sub Phatty in the same way.
Here is a good example of what happens when you move beyond traditional mono bass and lead programming:
Not Just a Bass Synth
Calling the Subsequent 25 a bass beast is absolutely accurate—but it can also be misleading if it makes you think that bass is all it can do.
Once you start combining oscillator detuning, modulation, filter movement, drive and external effects, the synth becomes surprisingly effective for ambient and cinematic sound design. Its strong fundamental tone works beautifully as the starting point for large reverbs and delays because there is so much harmonic material to process.
This ambient demo shows a completely different side of the instrument:
That versatility is one of the reasons I spent so much time designing sounds for the Subsequent 25. It can move from brutal mono bass to soft, spacious textures without losing its identity.
Workflow and Live Performance
The Subsequent 25 strikes a very good balance between traditional hands-on analog synthesis and a modern preset-based workflow. Most of the important sound-design controls are directly accessible from the front panel, while additional parameters can be accessed through the editor.
For studio work, that means you can approach it almost like a traditional analog synth while still having the convenience of recalling sounds when needed. For live musicians, the combination makes even more sense.
The Subsequent 25 is compact, extremely solid, has a very playable full-size keyboard and gives you immediate physical access to the controls that matter most. If you need that unmistakable Moog bass or lead sound on stage without carrying a much larger instrument, this thing is a beast.
Buying a Moog Subsequent 25 in 2026
Because production has ended, the used market is now the main place to look for a Subsequent 25. That is not necessarily a disadvantage. These instruments were built as serious performance synths, and well-kept examples should remain attractive to musicians specifically looking for the Sub Phatty/Subsequent family sound.
When buying used, I would mainly pay attention to the general condition of the keyboard and controls, check that all pots and switches behave correctly, and make sure the instrument has not suffered obvious physical damage from heavy touring or transport.
My Custom Moog Subsequent 25 Presets
The Subsequent 25 became one of those instruments that I kept returning to for sound design, and over time I created a large collection of custom presets covering basses, leads, classic analog tones, sequences, warmer sounds and more experimental patches.
I also recorded a 1.5-hour demonstration featuring more than 250 custom sounds, which gives a much broader picture of what the instrument can do beyond its obvious bass duties.
Another useful advantage is compatibility with the older Sub Phatty. Subsequent 25 and Sub Phatty presets are interchangeable, although small differences in the analog circuitry mean that the same patch can sound slightly different between the two instruments.
Free Moog Subsequent 25 Sample Pack
You do not need to own the hardware to experiment with some of its raw analog character. I also created a free collection of sounds recorded directly from the Subsequent 25.
221 high-quality WAV samples • 110+ MB • 44.1 kHz / 32-bit float • drag & drop
The Moog Subsequent 25 Sample Pack is a collection of raw analog expressions captured directly from the hardware—from FX and noise textures to percussive hits, single notes and raw waveforms. The samples preserve the warmth, punch and clarity of the instrument and work well for complex layers, cinematic soundscapes and experimental textures in any DAW or sampler.
Free Moog Subsequent 25 FX Samples
I also created a second free collection focused specifically on the more experimental side of the synth.
101 high-quality WAV samples • 95+ MB • 44.1 kHz / 32-bit • drag & drop
Moog Subsequent 25 FX Samples is a focused collection of wild, expressive and atmospheric analog effects recorded directly from the synth. You will find sweeping resonances, glitchy transitions, modulated hits, filter sweeps and evolving analog textures organized for quick browsing.
Moog Messenger: The Modern Alternative
If you want a brand-new Moog rather than searching for a used Subsequent 25, the Moog Messenger is the obvious current model to investigate.
It is not simply a renamed Subsequent 25. Messenger is a newer design with a different architecture and a more modern feature set, so it should be seen as an alternative rather than a direct replacement.
For someone buying a new instrument today, it makes a lot of sense to compare the two. But if what you specifically want is the character and familiar response of the Sub Phatty/Subsequent family, a used Subsequent 25 still has a very strong identity of its own.
Final Thoughts: Is the Moog Subsequent 25 Still Worth Buying?
The Moog Subsequent 25 is one of those instruments whose apparent simplicity hides just how useful it can be. It is compact, immediate and unapologetically focused on strong analog tone. For basses in particular, it is an absolute monster—but restricting it to that role would miss a large part of what makes it interesting.
After using the Sub Phatty for years and later spending extensive time with the Subsequent 25, I see the newer instrument as a genuine evolution of that concept. The improved headroom, more defined response, excellent keyboard and Duo Mode make it feel like a more complete performance synth while retaining the aggressive, hands-on character I liked about the original.
So, is the Moog Subsequent 25 still worth buying used in 2026? If you specifically want this particular Moog character, a compact performance format and a synth that excels at powerful basses while still being capable of much more experimental sounds, I think it remains a very compelling option on the second-hand market.
Its discontinuation does not suddenly make it outdated. If anything, it makes the Subsequent 25 a more interesting instrument to revisit now that it represents a specific chapter of modern Moog design rather than simply being another current model in the catalog.
If bass synthesis is your priority, you can also compare it with other instruments in my Top 9 Bass Synthesizers guide.
For a very different approach to the classic Moog sound, read my full Moog Mother-32 Review.
