2hp Delay ()

Name: 2hp Delay
Brand: 2hp

A sliver of silver or black magic that turns milliseconds into infinite labyrinths — if you know how to feed it.

Overview

It doesn’t look like much — two knobs, two jacks, a tiny rectangle of brushed metal — but patch in the 2hp Delay and you’re suddenly holding a key to recursive sonic universes. You can dial in a tight slapback that snaps like a snare ghost, or twist the feedback past eleven until the repeats fold in on themselves, clip, and erupt into self-oscillating noise that feels like the module is trying to eat its own tail. It’s not a pristine digital echo; it’s a character-driven processor with a slight grit, a touch of color, and a feedback path that doesn’t just repeat — it transforms. At just 2HP wide, it’s a skiff-saver, a space hog’s dream, and yet it refuses to compromise on control. Every parameter has CV access, which means you can modulate delay time and feedback in real time, warping echoes into rhythmic pulses or spiraling drones with an LFO or envelope. This isn’t background ambience — it’s a lead instrument in disguise.

Despite its minimal faceplate, the Delay packs a full feature set into its 46mm depth. The delay time stretches from barely-there milliseconds up to nearly two seconds, depending on the source, giving it surprising range for such a compact unit. That upper limit isn’t studio-grade long, but it’s enough to build evolving textures or throw a vocal line into a canyon — especially when you start modulating the time with CV. The feedback knob is where things get dangerous: turn it past noon and the repeats don’t just sustain — they gain harmonic complexity, clipping softly at first, then breaking into digital distortion that some users exploit as a noise source or sample generator. It’s not a flaw; it’s a feature baked into the design. Owners report using it to generate glitchy textures, rhythmic stutters, or even pseudo-reverb by maxing feedback and damping the input. It won’t replace a dedicated reverb, but in a pinch, it’ll surprise you.

Specifications

Manufacturer	2hp
Production Years	Not specified
Original Price	$129.00
Width	2HP
Depth	46mm
Power	+12V: 72mA
Power	-12V: 28mA
Power	5V: 0mA
Color	Silver, Black
Delay Time Range	Milliseconds to nearly 2 seconds
CV Inputs	Yes, for all parameters
Feedback Range	Slapback to self-oscillation
Module Type	Eurorack delay audio processor
Input/Output	1x Input, 1x Output
Knobs	Delay Time, Feedback
Mounting	Standard Eurorack 3U

Key Features

CV Control Over Everything

What elevates the 2hp Delay from a utility module to a performance centerpiece is its full CV implementation. Both delay time and feedback accept control voltage, and there’s no hidden menu diving or shift functions — just patch and go. This means you can sync delay time to your sequencer’s clock via an LFO, or have feedback swell with an envelope follower, creating echoes that breathe with your playing. Some users report patching a slow triangle wave into the time CV to create Doppler-like pitch sweeps in the repeats, while others use random voltage to scatter echo density unpredictably. It’s rare to find this level of modulation access in such a narrow module, and rarer still at this price point.

Feedback That Fights Back

The feedback path isn’t just a level control — it’s a tone shaper. As feedback increases, the repeats don’t just get louder; they begin to saturate, adding a soft digital clipping that thickens the signal. Push it further and the module enters self-oscillation, generating a tone from the feedback loop itself. This isn’t a clean sine wave — it’s buzzy, complex, and slightly unstable, making it useful for noise layers, percussive triggers, or even as a makeshift oscillator when patched creatively. Service technicians observe that this behavior is intentional, not a sign of circuit failure, though users should be cautious about sending hot signals into the input when feedback is high, as it can overload the output stage.

Minimalist Design, Maximum Utility

In an ecosystem where modules keep getting wider and more complex, the 2hp Delay is a masterclass in efficiency. At 2HP, it takes up less space than a single pot on some modules, yet it delivers a full-featured delay with no compromises on core functionality. It’s skiff-friendly, power-efficient (drawing only 72mA on +12V and 28mA on -12V), and mechanically simple — no moving parts beyond the knobs, no display to fail. Collectors note that this simplicity translates to reliability: aside from the occasional cold solder joint on power pins (common in many Eurorack modules), there are no widespread failure points. The lack of a wet/dry mix control is the most frequent critique, but many users work around it by mixing the delayed signal externally or using a VCA to blend.

Historical Context

The 2hp Delay emerged during the mid-2010s Eurorack boom, when skiff-sized cases and HP efficiency became selling points. While other companies were building larger, feature-rich effects modules, 2hp — founded by designer Tony Rolando — focused on distillation: what’s the absolute minimum needed to make a delay useful in a modular context? The answer was a no-compromise digital core, full CV access, and a footprint so small it could hide behind a cable. It wasn’t the first 2HP module, but it became one of the most iconic, embodying the “less is more” philosophy that defined a generation of compact modular design. Competitors like the Make Noise Mimeophone or Intellijel Rainmaker offered more textures and longer delays, but they came at 16HP or more. The 2hp Delay carved its niche by being the smallest full-featured delay available — a module you could justify adding even if you were down to your last 4HP.

It arrived at a time when Eurorack users were moving beyond basic synthesis and exploring effects as integral parts of their patches. Delays weren’t just for guitarists anymore; they were modulation sources, rhythm generators, and texture machines. The 2hp Delay fit perfectly into that shift — not as a destination effect, but as a utility that could be patched, modulated, and abused in real time. Its influence can be seen in later compact delays from Happy Nerding, ALM, and Noise Engineering, all of which cite space efficiency as a design priority.

Collectibility & Value

The 2hp Delay remains in production and widely available, so it’s not a collector’s item in the traditional sense — but it is a staple. On the used market, expect to pay between $80 and $110 depending on condition and color. The silver version is more common, while black units occasionally fetch a slight premium due to their limited availability. Since it’s still manufactured, prices are stable, and there’s no urgency to buy before it’s discontinued — though given 2hp’s reputation for long-term support, that’s unlikely anytime soon.

Failures are rare, but when they occur, they’re usually power-related. Documentation shows that some early units had issues with the power connector orientation, leading to reversed polarity if plugged into certain distribution systems — a risk with any Eurorack module, but worth checking when buying used. There are no known firmware updates or service advisories, and the module contains no user-serviceable parts beyond cleaning the jacks. Owners report that the PCB is well-laid out, and the components are standard surface-mount types that can be replaced by a technician if needed. The biggest “failure” isn’t mechanical — it’s expectation mismatch. Buyers expecting a clean, long, studio-grade delay will be disappointed. This is a character module, not a utility echo — and that’s exactly why it’s loved.

When buying used, check for consistent knob resistance and clean jack operation. Since the module has no display or indicators, the only way to test it is by patching — listen for digital artifacts, dropouts, or inconsistent feedback behavior. A healthy unit should produce smooth repeats, clean modulation via CV, and stable self-oscillation when feedback is maxed. Avoid units with bent mounting ears or cracked solder joints near the power pins.