2hp HAT (2018–)

A sliver of metal and mayhem that turns two horizontal inches into a universe of clatter, hiss, and robotic sizzle.

Overview

Plug in the 2hp HAT and you’re not just adding a hi-hat to your rack—you’re installing a tiny sonic saboteur. It doesn’t just mimic cymbals; it dissects them, reassembles them with oscillators and noise, and spits out something that could’ve been forged in a factory on Mars. You’ll find yourself reaching for it not because your patch needs a hi-hat, but because it needs *texture*—a flicker of metallic unease, a burst of sizzling decay that hangs just long enough to feel alive. It’s the kind of module that makes you forget it’s only 2HP wide. In a system crammed with oscillators and filters, this one slips in like a stowaway and ends up running the ship.

Despite its size, the HAT is a full percussion voice with three distinct internal sound sources, each built from a pair of oscillators and tied to a noise generator and filtering network. That’s six oscillators in total, all tuned to create the complex, inharmonic chaos of a real cymbal strike—but with the precision and control of synthesis. The magic happens in how these layers interact. The “Sizzle” knob isn’t just a timbre tweak; it’s a morphing engine that shifts oscillator frequencies and filter responses across all three sources at once, letting you glide from a tight, choked 909-style hat to a wide-open, washy crash that dissolves into digital dust. It’s rare for a module this small to offer such a broad emotional range—from clinical and robotic to organic and breathy—but the HAT pulls it off without breaking a sweat.

And yes, it gives you separate trigger inputs for open and closed sounds, which means you can sequence full hi-hat patterns without patching logic or using multiple modules. That alone makes it a space-saving win in a crowded Eurorack system. But what really sets it apart is how *musical* it feels. Most compact percussion modules end up sounding like afterthoughts—thin, predictable, or brittle. The HAT doesn’t. It has weight, presence, and a kind of dynamic responsiveness that makes it feel less like a drum machine and more like an instrument. Patch in a bit of CV to modulate Sizzle or decay, and suddenly you’re playing it like a mallet instrument, each hit shaped by gesture and voltage.

Specifications

Key Features

The Sizzle Knob Is the Secret Weapon

Calling it a “tone control” would be like calling a flamethrower a lighter. The Sizzle knob is the soul of the module, warping the entire sonic character in real time. Turn it one way and you get a tight, almost plastic snap—the kind of closed hat that cuts through a mix like a scalpel. Turn it the other, and the sound blooms into a shimmering, metallic wash with decay that lingers like steam off hot metal. Because it affects all three internal sound sources independently—shifting oscillator tunings and filter states—it doesn’t just change brightness; it changes *structure*. This isn’t filtering after the fact; it’s re-synthesizing the sound on the fly. Patch a slow LFO into the Sizzle CV input, and you’ve got a hi-hat that breathes, pulses, and evolves with every hit. It’s the closest a 2HP module can come to feeling alive.

Open and Closed Triggers in One Tiny Package

In most compact percussion modules, you get one trigger input and maybe a CV to switch between open and closed states. The HAT gives you two dedicated trigger inputs—one for open, one for closed—so you can sequence both sounds independently without any logic modules or complex patching. This is a bigger deal than it sounds. It means you can run a clock into one, a delayed version into the other, and get realistic hi-hat patterns with just a single module and a basic sequencer. No XOR gates, no slew circuits, no headaches. For live performers or minimalists, that’s a game-changer. It also means you can use different trigger sources—say, a drum pad for closed hits and a sequencer for open—to create hybrid, expressive patterns that feel less programmed and more played.

Three Sources, One Cohesive Voice

It’s easy to assume that “three sound sources” means three separate drum sounds you can switch between. But that’s not how the HAT works. Instead, all three sources are layered and blended internally to create a single, complex percussion voice. Each source combines oscillators and noise in a different configuration, then runs through its own filter network. The result is a composite sound that mimics the layered, chaotic resonance of a real cymbal—no single sine wave or noise burst, but a collision of frequencies that interact in unpredictable ways. You don’t control them individually; you shape them *together* via Sizzle and Decay. This design choice is brilliant: it keeps the interface simple (just two knobs and a few jacks) while delivering a sound that feels rich and multidimensional. It’s not a drum machine; it’s a cymbal synthesizer.

Historical Context

The 2hp HAT arrived in 2018 as part of a trio of drum modules—alongside KICK and SNARE—that redefined what “compact” could mean in Eurorack. At a time when modular systems were getting bigger, louder, and more complex, 2hp went the opposite direction: smaller, smarter, more focused. The HAT wasn’t the first attempt at a Eurorack hi-hat, but it was the first to deliver such a wide sonic palette in such a tiny footprint. Competitors like Make Noise Mimeophon or Qu-bit Nebulae offered more flexibility but demanded far more space and patching. The HAT’s genius was in its specialization—it didn’t try to be a full drum machine or a sample player. It focused on one thing (hi-hats) and did it with surgical precision.

It also arrived when modular percussion was shifting from an afterthought to a centerpiece. Artists were no longer just using drums to keep time; they were using them as textural elements, as sources of rhythmic tension and release. The HAT fit perfectly into that world. It wasn’t about replicating acoustic kits; it was about creating new sonic spaces. Compared to vintage drum machines like the 808 or 909, the HAT didn’t aim for nostalgia. It sounded *new*—mechanical, alien, sometimes unsettling. And in an era where producers were hungry for unique sounds, that was exactly the point.

Collectibility & Value

The 2hp HAT has held its value remarkably well since its 2018 release, with used units typically trading between $110 and $140 depending on condition and color. The silver version is slightly more common, but both black and silver command similar prices. Unlike some boutique modules that inflate due to scarcity, the HAT remains accessible—not because it’s overlooked, but because 2hp kept production steady and demand consistent. It’s not a “grail” module, but it’s a “must-have” for many, which keeps the resale market active without wild speculation.

That said, there are quirks to watch for. Owners report that the HAT can be sensitive to trigger rise time and voltage levels, particularly when used with certain sequencers like the Mutable Instruments Grids. Some users experience timing inconsistencies or missed triggers unless the incoming pulse is fast and clean (ideally 5–10V with a sharp edge). This isn’t a flaw in the module itself, but a design characteristic—it expects robust triggers. If you’re using a system with weak or slow-rising gates (like some DIY or older modules), you may need to buffer or condition the signal. On the other hand, with a solid trigger source like the Intellijel Steppy or a Doepfer A-160, it performs flawlessly.

Maintenance is minimal. There are no moving parts, no trimpots to drift, and no known failure points. The PCB is compact and well-built, and the front panel is anodized aluminum that resists wear. The only real risk is static damage during installation, so as with any Eurorack module, ground yourself before plugging it in. Given its simplicity and solid construction, the HAT is likely to remain functional for decades with basic care. For collectors, it’s not about rarity or investment potential—it’s about utility. This is a module you buy because you’ll *use* it, not because you’ll flip it.

eBay Listings

2HP Hat Hi-Hat Percussion Module EURORACK - DEMO - PERFECT C

$129

2HP Hat Hi-Hat Percussion Module Black EURORACK - NEW - PERF

$139

2HP Hat Hi-Hat Percussion (Silver) EURORACK - NEW - PERFECT

$139

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