ALM Busy Circuits ALM 3U 19" Rackable case with power supply

3U Eurorack case, 19-inch rack-mountable, with power supply

• 84 HP 3U Eurorack case in a 19-inch rack-mountable configuration
• Anodized aluminum construction, sturdy and lightweight: approximately 0.9 kg
• Up to 1 A on the +12 V and -12 V lines, with a specified ripple of 100 mV at full load
• Shielded, low-noise DC/DC converter with overload and short-circuit protection
• Keyed connectors for up to 16 modules
• Fixed mounting rails with M3 threads; no sliding nuts
• Usable depth up to 42 mm, compatible with all ALM modules

The ALM Busy Circuits 3U 19-inch rackmount is the rack-mount version of the 84 HP ALM Eurorack case with integrated power supply. It allows you to mount a row of modules directly into your studio rack or live flight case, alongside preamps, processors, and outboard effects. Originally designed for the System Coupe, the ALM case has evolved into a range of formats available individually, all featuring an anodized aluminum frame, a power switch, and high-quality powered bus boards.

19-inch Eurorack Rack Case for Studio and Live Use

The 19-inch rack-mountable format integrates the modular system into the infrastructure you already use, without taking up desk space. It’s the ideal solution for those who want to keep a Eurorack section permanently wired and ready in the studio, or for those who take a hybrid setup on tour inside a transport rack. The anodized aluminum frame ensures durability and lightness, with a total weight of approximately 0.9 kg. The external dimensions are 483 x 132 x 66 mm.

Fixed mounting rails with M3 threads

Instead of sliding nuts, which are often frustrating to position, the case uses fixed mounting rails with M3 threads. Screwing in modules is quick and precise, with no screws spinning freely or nuts shifting out of place. The usable depth accommodates modules up to 42 mm thick—equivalent to approximately two stacked PCBs—and all ALM modules fit seamlessly.

Integrated low-noise Eurorack power supply

The fixed bus board provides ample power and keyed connectors to connect up to 16 modules without the risk of polarity reversal. The +12 V and -12 V lines deliver up to 1 A each, with a specified ripple of 100 mV at full load. There is no +5 V line.

Shielded DC/DC Converter with Protections

The shielded DC/DC converter ensures a low-noise power supply and includes overload and short-circuit protection. The case is powered by an included external 12 V power supply, featuring a 2.1 mm center-positive barrel connector, and includes a power switch.

The ALM Eurorack Enclosure Line

In addition to the rack-mountable version, the ALM chassis lineup includes 3U, 6U, and 9U desktop models (84 HP) and 3U, 6U, and 9U desktop models (52 HP), allowing you to expand your system while maintaining the same build quality.

Technical Specifications

• Brand: ALM Busy Circuits
• Model: 3U 19-inch rack-mountable Eurorack chassis with power supply
• Format: 3U, 84 HP, 19-inch rack-mountable
• Construction: Anodized aluminum
• Power Supply: up to 1 A at +12 V and up to 1 A at -12 V; no +5 V line
• Specified ripple: 100 mV at full load
• Shielded, low-noise DC/DC converter with overload and short-circuit protection
• Connectors: keyed, for up to 16 modules
• Installation depth: up to 42 mm
• Mounting: fixed rails with M3 threads
• Power switch
• External power supply included: 12 V DC, 2.1 mm barrel connector (center positive)
• External dimensions: 483 x 132 x 66 mm
• Weight: approximately 0.9 kg