ADDAC304 Manual Gates ()

Eight tactile gate triggers in 8 HP - with a twist that turns half of them into momentary signal pass-throughs.

Overview

The ADDAC304 Manual Gates doesn't make a sound and won't modulate anything on its own. What it gives you is eight physical points of control. Each one is a gate launcher that can fire sequences, trigger envelopes, or nudge a sequencer forward with a firm thumb press. Owners report it's "a perfect way to perform on and control your modular system."

Four of the eight gates do double duty, and that is what sets the ADDAC304 apart from a row of simple momentary buttons. Patch a signal into one of those channels and the button doesn't just send a +5V pulse - it momentarily passes the incoming signal through. You can use that to manually gate an LFO into a filter cutoff, trigger a sample playback, or mute and unmute a noisy oscillator on the fly. In practice that makes it closer to a performance-oriented switch matrix than a simple trigger source. The buttons have a crisp feel, with no mush and no wobble, and they feel built to survive gig use.

It's part of the ADDAC300 Series, a family of utility-focused Eurorack modules designed for hands-on control and signal manipulation. The fact sheet doesn't say where it sits in the lineup, whether entry-level, flagship, or niche tool. The whole module draws just 10mA on the +12V rail and nothing on the others, so it barely registers in a crowded case. It is 8 HP wide and only 2.5 cm deep, so it fits into tight setups easily.

Specifications

Manufacturer	ADDAC System
Format	Eurorack
Width	8 HP
Depth	2.5 cm
CV inputs	± 10v
Gate outputs	0 +5v
Max current	10mA
Bus Board Cable	8 × 2 IDC (Doepfer style) connector
Current draw +12 V [mA]	10
Panel / Color	Black Alu
Power consumption	10 mA +12V, 0 mA -12V, 0 mA 5V
Module height	3U
Number of channels/gates	8

Key Features

Eight Manual Gates, Two Modes

The ADDAC304 has eight independent manual gate channels, each activated by a physical button. When pressed, each outputs a +5V signal. When released, it drops back to 0V. That is plain gate generation, good for starting envelopes, advancing sequencers, or manually triggering drum modules. Half of the channels (four) have a twist. Patch a signal into their input and pressing the button momentarily passes that signal through instead of outputting a fixed +5V. So you can use them as momentary switches for audio or CV, to punch in an effect, reroute a modulation path, or briefly override a control voltage, all with a single press.

Signal-Aware Button Logic

The module changes behavior based on patching. If a jack is inserted into one of the four special channels and carrying a signal, the button acts as a momentary gate for that signal. With no signal present, it defaults back to the standard +5V gate output. So the module can be a pure manual gate source or a hands-on signal switcher, depending on how you wire it.

Compact and Efficient Power Use

Eight channels, and it still takes very little room or power. It draws only 10mA from the +12V rail and nothing from -12V or 5V. The 8 HP width fits in almost any gap, and the 2.5 cm depth keeps it clear of back panels and power supplies. The bus board uses a standard 8×2 IDC (Doepfer-style) connector, so it should work with most Eurorack cases and power systems.

Build and Panel Options

The standard version ships with a black anodized aluminum panel. ADDAC System also offers custom panel colors: Green, Blue, White, Silver Gray, Yellowed Silver, and Dark or Light Bronze. They let builders color-code their systems or match a specific look. The module uses momentary switches across all eight channels. No data exists on common failures or maintenance needs.

Collectibility & Value

The ADDAC304 is available as a pre-built module and as a full DIY kit priced at 58€ (excluding VAT). The current retail price for the assembled version is listed at €75.00 (including VAT) by Exploding Shed, a representative figure among European retailers. With its utility-focused design and lack of rare components, it's unlikely to become a high-value collector's item, though modular users keep demand steady. The custom-colored panels add a slight premium, though no data confirms price differences based on color. Original pricing at introduction was 90.00€ (excluding VAT), according to the manufacturer, which suggests a modest price reduction or regional variation over time. No information is available on production years, common failures, or long-term maintenance issues.