2hp Mix (2010s)

Name: 2hp Mix
Brand: 2hp

A simple mixer that disappears sonically. It does the one job a modular needs done.

Overview

Put it in your rack between a noisy oscillator and a finicky filter and things tighten up. That's the 2hp Mix: four channels of clean summing in a module that takes up less space than a power cable bend. It doesn't modulate and it doesn't sync to MIDI. It just mixes. After a few weeks of use you forget it's there, until you unplug it and see how much you were leaning on it.

The faceplate is four tiny knobs and five jacks, but the Mix does more than that suggests. Each channel accepts audio or CV thanks to DC coupling, so you can blend control voltages for morphing filter cutoffs or sum LFOs before they hit a VCA. The audio path is where it earns its keep. Noise floor is virtually nonexistent. Coloration is none. It doesn't sweeten, saturate, or soften the way some mixers add "character" whether you want it or not. It gives a transparent sum that keeps every transient and harmonic detail from your oscillators, drums, or external gear.

2hp is a brand known for packing utility into tiny footprints, and the Mix fits that. It isn't flashy, but in a system built from boutique oscillators and hand-wired filters, a clean summing point is a handy thing to have.

Specifications

Manufacturer	2hp
Production Years	2010s
Original Price	$99
Format	Eurorack
Width	2 HP
Depth	45 mm
Power Consumption +12V	41 mA
Power Consumption -12V	41 mA
Power Consumption 5V	0 mA
Inputs	4 x 3.5mm (DC-coupled)
Output	1 x 3.5mm
Signal Type	Audio and CV
Coupling	DC-coupled
Controls	4 x Level knobs
Weight	Approx. 50 g
Color Options	Silver, Black

Key Features

DC-Coupled for Dual Duty

Most mixers in Eurorack are AC-coupled, meaning they block DC voltage and are strictly for audio. The 2hp Mix doesn't care. Its DC coupling lets it handle both audio signals and control voltages. Need to average two pitch CVs for detuned oscillators? Mix them. Want to sum multiple envelope generators into a composite modulation source? Same thing. That makes the Mix a modulation hub as well as a final summing stage, and it can replace attenuators, offset generators, or dedicated CV mixers in some patches.

Skiff-Sized, Studio-Quality Signal Path

At just 2 HP wide and 45 mm deep, the Mix fits the tightest skiff or travel case. The internal circuitry is optimized for low noise and high headroom, and it favors signal integrity over gimmicks. There's no clipping protection, no mute switch, no pan controls - just four precision potentiometers and a clean op-amp summing stage. It behaves more like a high-end studio summing amp than a space-saving utility. It handles hot signals without distortion and stays clear when summing dense, harmonically rich sources like digital oscillators or FM pairs.

No Frills, No Failures

With no switches, no LEDs, and no microcontrollers, the Mix has almost nothing to break. It's entirely analog, passive in topology but actively buffered to prevent loading down upstream modules. With no digital components or firmware, there are no resets, no USB issues, no "bricking." Owners report units running reliably for over a decade with zero maintenance, which is rare in a format where even power supplies occasionally hiccup. If a Mix fails, it's usually due to a damaged jack or a rare PCB solder issue, not inherent design flaws.

Historical Context

When 2hp launched in the early 2010s, Eurorack was expanding rapidly, but rack space was still tight. Most mixers occupied 4, 6, or even 8 HP, eating up room that could go to oscillators or effects. The Mix showed you didn't need width to get quality. While boutique modules were getting flashier and more feature-laden, 2hp went the opposite way. The Mix, along with the company's attenuator and mult modules, defined a new category of "gap fillers" - tiny utilities that solved real routing problems without demanding attention or space.

Competitors like Intellijel and Mutable Instruments offered mixers with pan controls, mute buttons, or LED level meters, but those cost depth, power draw, and width. The 2hp Mix competed on efficiency instead of features. It appealed to minimalists, travelers, and skiff builders who valued function over flash. Its success spawned a wave of ultra-compact utilities from other brands, but few matched its combination of fidelity and footprint. Over a decade later, it remains a benchmark for a small-format mixer.

Collectibility & Value

The 2hp Mix has never been rare. Production has been steady, and units are widely available from authorized dealers and secondary markets. Its collectibility lies in ubiquity, not scarcity. It shows up in nearly every serious Eurorack build because it's necessary. Used units typically sell for $60 - $80, depending on condition and color, while new modules still list at $99. Black and silver faceplates are functionally identical, but black tends to fetch a slight premium due to aesthetic preference in minimalist builds.

Failures are uncommon, but when they occur they're usually mechanical: bent jacks from careless patching or cracked solder joints from repeated insertion force. The knobs, while sturdy, can become loose over time and may need occasional tightening. No design flaws or batch issues have been reported by technicians or repair shops. Because it draws equal current on both rails (41 mA ±12V), it plays nicely with most power supplies, though skiff builders should ensure their busboards can handle the negative rail load if stacking multiple 2hp modules.

For buyers, the advice is simple: inspect the jacks for wobble and test all four channels with a known signal. The module is so basic that there's little to go wrong, but also little room for hidden defects. If it powers up and passes audio, it'll likely last another ten years. No recalibration, no firmware updates.