Behringer System 55: The Ultimate Modular Starter Pack?

Whether you want to learn about the world of modular synthesis, or you're looking for an ultra-flexible, hands-on sound design playground, taking that leap of faith might seem daunting or expensive. Behringer are out to change that with the System 55, an all-in-one rack that'll have you patching in minutes - but how does it work? Read on...

Robin Tindill

Robin Tindill

Looking for a way into modular synths without blowing your budget? Find out how the Behringer System 55 brings vintage modular magic to the masses in one ready-to-patch package.

Modular synths have a certain reputation. They’re powerful, sure, and plenty flexible, but they can be more than just a little intimidating too! But what if there was a system that captured all the creativity and sound-shaping potential of modular without the eye-watering price tag or mind-numbing complexity? That’s where the Behringer System 55 comes in.

If you’ve ever looked at a spaghetti-like wall of cables and thought, “Nope, too complicated”, the Behringer System 55 might just change your mind. This is modular synthesis made accessible. A faithful recreation of a classic system, complete with Eurorack compatibility, wallet-friendly pricing, and plug-and-play simplicity. Could this be the foot in the door to modular synthesis you’ve been waiting for? Let’s take a deeper look.

What is the Behringer System 55?

The Behringer System 55 is a complete Eurorack modular synthesizer system. Based on the legendary Moog Modular System 55 from the 1970s, Behringer have replicated the original’s analogue tone and layout, including a wide selection of classic modules: oscillators, filters, mixers, envelope generators, sequencers and more, all pre-installed into a sleek Eurorack-compatible case.

The original Moog System 55 was famous for its rich, warm tones – and astronomical price tag! However, while Behringer have pulled out all the stops in reproducing the sounds of the original, their version offers a far more accessible path to vintage modular synthesis. So, if you’re chasing raw analogue power, intricate textures, or classic synth sounds, the System 55 delivers in spades, and with surprising fidelity and flexibility.

What is the Behringer System 55 Based On?

As we touched on, the Behringer System 55 is inspired by the Moog System 55, a linchpin of 1970s modular synthesis. Frequently used by electro pioneers like Keith Emerson and Wendy Carlos, the original featured thick, evolving tones and an ergonomic, hands-on workflow.

Crucially, Behringer have painstakingly recreated the circuitry of these modules using authentic analogue designs. From the 921B Oscillators to the CP3A Mixer, these modules maintain the signal flow and all the sonic character of the original, but in a far more compact and affordable package.

Behringer System 55 Modules Breakdown

The Behringer 55 System includes 38 vintage analogue modules, each with its own specific function. Highlights include:

  • 2 x 921A oscillator drivers featuring 6x921b VCOs and 1×921 VCO for a total of 7 voices
  • Selection of filters including 1×914 fixed filter bank with 12 bandpass filters, 1x 923 filter modules with highpass and lowpass filters and white/pink noise sources
  • 3 envelope generators with S-trig input and CV outputs
  • 911A trigger delay module
  • 24 step sequencer in 8 steps with 3 rows
  • The 992 control voltage module allows CV mixing and switching with 1 inverting attenuator 
  • 903A random signal generator module provides dual white and pink noise sources

Even better, all modules are housed in a sleek, ready-to-go Eurorack cabinet with a robust power supply. Pick up a few patch cables, and you’re all ready to go!

Modular vs Semi-Modular – What’s the Difference?

If you’re brand new to the synth scene, you might have heard the terms modular and semi-modular thrown around, but what do they mean? Here’s a quick breakdown:

  • Semi-modular synths (like the Behringer Neutron or Moog Mother-32) are self-contained, pre-patched systems with a default signal path already in place. However, as they’re semi-modular, you can use patch cables to override this path and create new routings.
  • Modular systems (like the Behringer System 55) have no default signal flow – everything is created from scratch by physically patching cables between modules.

There’s no doubt that modular synths offer much more flexibility, but they do have a slightly steeper learning curve that new users might find a bit more intimidating. That’s where the System 55 shines: it’s modular, but it’s been pre-built and laid out in a clear, logical way. No starting from a pile of loose modules and a soldering iron; you can be up, running, and patching away right out of the box.

Why Choose Modular Synths Over Software?

Now, you might be wondering whether modular synths really have a place in the modern world. After all, with the ever-increasing abilities of digital synths and even plugins, why bother with the extra expense, not to mention all those cables! And if it all came solely down to sound, then that might be a smoking gun. But the simple truth is, modular isn’t just about sound – it’s about interaction. Turning knobs, patching cables, hearing immediate feedback. It’s all part of the wonderful tactile nature of modular synths, and it makes sound design feel more like sculpting than simply programming. You don’t just ‘click’ a setting, you physically shape it in real-time.

There’s no denying that modular software has come a long way in emulating the patching experience, with some incredible standout options like the u-he Bazille Virtual Modular Synth Plugin and Kilohearts Phase Plant SoftSynth. But analogue hardware does still hold several clear advantages:

  • Latency-free performance: Instantaneous response with no buffering or processing delays.
  • Hands-on control: Every knob, jack, and slider invites spontaneous creativity.
  • Sonic depth and unpredictability: Analogue circuits can behave just a little bit differently each time, adding natural variation and richness.
  • No screen fatigue: Modular hardware pulls you away from the mouse, letting you work with your ears and hands.
  • Musical inspiration: Ask any analogue gearhead, and they’ll tell you that the mere presence of physical gear can often spark new ideas, simply by being there to interact with. What’s more, the limitations of a fixed interface can dispel that decision fatigue and push you to focus your thoughts in more creative ways.

Aside from these clear benefits, there’s something unquantifiable about getting your hands on analogue gear, the satisfaction of building your own signal path from the ground up. No menus, no presets, just pure sound shaping. If you enjoy a more visceral, exploratory approach to your music-making, modular hardware is seriously hard to beat. And with Behringer’s often unbeatable pricing, the entry barrier to modular has never been lower.

Is Behringer System 55 Worth It?

Short answer: yes – if you want real analogue modular sound without breaking the bank.

The Behringer 55 System offers undeniable value for money. A true modular system with 38 analogue modules, ready to patch out of the box, and all for a fraction of the price of a Moog or Buchla setup.

Compare it to virtual modular software, and you benefit from physical interaction, zero latency, and authentic analogue tone. Unlike software synths or desktop modules, there’s just something deeply satisfying about having that much analogue hardware at your fingertips. And unlike semi-modular synths, you’re not locked into a fixed signal path either. The Behringer System 55 is compact enough to fit into most home studios, but with enough real estate to really explore those complex patches and signal chains. 

It’s ideal for:

  • Newcomers wanting a taste of modular without DIY headaches
  • Vintage synth fans craving Moog-style sounds
  • Experimental musicians and sound designers

Behringer System 55 FAQs

What is the Behringer System 55 based on?

It’s based on the classic Moog System 55 from the 1970s, one of the most iconic modular synths ever produced.

Is the Behringer System 55 worth it?

We think so! It’s one of the most affordable ways to enter the world of modular synthesis, with over 35 analogue modules included at an unbeatable price.

How big is the Behringer System 55?

It’s housed in a 3-tier Eurorack cabinet, measuring approximately 664 x 420 x 165 mm and weighing in at around 12.3 kg.

What is the output of the Behringer System 55?

The System 55 operates with standard Eurorack-level audio and control voltage (CV) signals. Outputs are available from various modules:

  • Audio outputs from the VCOs, VCF, and Mixers
  • CV outputs from sequencers, envelopes, and LFOs
  • Gate/trig signals from modules like the 960 Sequencer or 911 EG

While it doesn’t have a master output like a traditional synth, you can route final audio through the CP3A-M mixer into your audio interface or amp. 

What’s included in the Behringer System 55 Complete?

38 classic-style analogue modules, a Eurorack case, and PSU. Just grab some patch cables and you’re ready to play.

What’s the difference between modular and semi-modular?

Modular synths have no fixed routing – you patch everything yourself. Semi-modular synths are typically self-contained and have a pre-set signal path, but you can override that with patching.

Can I expand the Behringer System 55?

Yes! It’s fully Eurorack compatible, so you can add more Behringer modules or other third-party Eurorack gear.

Is the Behringer System 55 good for beginners?

It certainly is. It’s designed to be a user-friendly entry into modular synthesis while still offering some serious sonic depth. 

Behringer System 55: Final Thoughts

The Behringer System 55 punches well above its price. It’s a modular synth that gives musicians and producers access to that classic modular workflow with genuine analogue circuitry, all in a format that’s approachable, compact, and creatively inspiring.

Just as importantly, the System 55 is a system you can grow into. Its modular nature means that no matter whether you’re experimenting with your first patch or building intricate signal chains, it can develop with you. And with Behringer’s growing catalogue of Eurorack modules, there’s always something new to explore!

Further Reading

If you enjoyed this article and want to keep digging, check out the following Learn articles to take a deeper dive into the world of synthesizers:

Robin Tindill
Robin Tindill
Robin is a synth lunatic and electronical enjoyer at heart. He has worked and performed and recorded for a wealth of bands such as, Dronningen, The Powdered Cows, Miss Defiant, Maella, Heist At Five and Nora. He has lecturered at the BIMM Institute London for the Studio Recording Module for Singing and Musicianship students. He's played at a range of venues including Camden Assembly, O2 Sheppards Bush Empire, YNOT Festival and Vervenfestivalen. He's also an expert on most musical equipment which isn't a guitar. He still performs music under the title Ripkord and Engineers venues across the UK. Long live the bass.

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