2hp LPG V2 ()
That subtle click before the sound swells and decays — this tiny gate shapes tone like a whisper turning into a shout.
Overview
The 2hp LPG V2 is a minimalist Eurorack module that does one thing with elegant precision: act as an analog low-pass gate. Built by Beepboop Electronics, it’s not an envelope generator or a filter in the traditional sense — it’s a hybrid, using a vactrol-based circuit to open and close dynamically in response to control voltage, letting both amplitude and timbre evolve together. It’s the kind of module you reach for when you want that soft, organic pluck — a marimba hit, a muted thumb piano, or the ghost of a bell that never quite rings out. Despite its simplicity, it’s surprisingly expressive, especially when paired with short triggers or envelope gates.
Owners report it excels in percussive patches, where its ability to “ping” with character becomes obvious. The VTL5C vactrol at its core gives it that slow, velvety response — not instant like a VCA, but alive, almost breath-like. It’s not trying to be fast or clean; it’s meant to color, to soften, to blur the edge between note and silence. And because it’s only 2 hp wide, it slips into even the tightest systems without a fuss. This isn’t a centerpiece module — it’s a texture tool, the kind of thing you patch in and suddenly wonder how you ever made sounds without it.
Specifications
| Manufacturer | Beepboop Electronics |
| Product type | Eurorack module, analog LOW-PASS GATE |
| Width | 2 hp |
| Weight | 0.25 kg |
| Dimensions | 34 × 20 × 2 cm |
| Depth | 30mm |
| Current Draw | +12V: 10mA, -12V: 10mA |
| Price | £59.00 |
Key Features
Vactrol-Based Low-Pass Gate
At the heart of the LPG V2 is a VTL5C vactrol — a light-dependent resistor paired with an LED, used here to create a smooth, voltage-controlled gate. Unlike a VCA, which only shapes amplitude, a low-pass gate also affects frequency content, progressively rolling off highs as the gate closes. This gives the module its signature softness, especially on transients. The result is a sound that doesn’t just fade out — it darkens, thins, and melts away. It’s particularly effective with short triggers (around 10ms), producing that classic “ping” associated with West Coast synthesis.
Improved CV Attenuator
One of the key upgrades in the V2 version is the refined CV attenuator. Earlier versions reportedly had a “dead zone” — a range where turning the knob did little because the internal LED wasn’t yet bright enough to activate the vactrol. The V2 eliminates this gap, offering smoother, more predictable response across the full rotation. This makes it easier to dial in subtle dynamics, especially when using nuanced control voltages from sequencers or random sources.
Cutoff Depth Switch
A three-position toggle switch lets users set the tonal character of the gate. In the top position, the sound is described as “Dark” — a tightly filtered, muffled output. The middle position opens up to “Bright,” allowing more high-end through for a crisper attack. Flip it to the bottom, and it goes “DEEP Dark,” an even more closed response that can turn a snare-like burst into a soft thud. This switch doesn’t just change volume — it reshapes the entire envelope and spectral profile, making it a powerful tone-shaping tool.
Decay Time Control
Another switch adjusts the decay time, altering how quickly the gate closes after a trigger. This gives hands-on control over the release character — from tight staccato to lingering fades. There’s also a hidden trick: a tiny switch embedded in the Vactrol symbol on the front panel toggles an internal LED. When enabled, this LED shortens the decay time, effectively giving a fourth, faster response curve. It’s a clever bit of stealth design that rewards exploration.
CV Input Behavior
The CV input is designed for 0–5V signals, making it compatible with standard gate and envelope outputs. However, owners should note that applying voltages above +7V can cause audio bleed — a quirk of the circuit where the signal leaks through even when the gate should be closed. This isn’t a failure mode, but a known limitation. Some might even exploit it creatively, but for clean gating, sticking to the recommended range is advised.
Collectibility & Value
The 2hp LPG V2 is currently listed at £59.00 by the manufacturer, Beepboop Electronics, and this is considered the authoritative price. There is no confirmed original price or secondary market data available, and no reports of common failures or maintenance issues. Given its recent production status and straightforward design, it appears to be more of a functional module than a collectible — valued for its utility rather than rarity. Still, its compact size, refined V2 improvements, and characteristic vactrol warmth make it a quietly essential piece in many West Coast or experimental Eurorack builds.
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