ALM Busy Circuits ALM 84 HP 9U case with power supply

84 HP 9U Eurorack Cases with Power Supply

• 84 HP, 9U Eurorack case with three rows and integrated power supply
• Sturdy and lightweight anodized aluminum construction: approximately 2.4 kg
• Up to 2.5 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 32 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 84 HP 9U is the largest Eurorack case in the ALM lineup with an integrated power supply: three 84 HP rows to build a complete modular system, with space for multiple voices, sequencers, modulators, mixers, and effects. Despite its size, it remains a lightweight case with desktop-friendly dimensions, making it easy to move between the studio and live performances. Originally designed for the System Coupe, the ALM case has evolved into a range of formats also available individually, all featuring an anodized aluminum frame, a power switch, rubber feet, and a high-quality power supply.

Three-row ALM Eurorack case in anodized aluminum

The all-anodized aluminum frame is durable yet lightweight, with a total weight of approximately 2.4 kg. Its dimensions are designed to fit comfortably on a table or desk—with a compact yet sufficient depth—and to allow for easy transport. The external dimensions are 440 x 396 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 the 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, equivalent to approximately two stacked PCBs: all ALM modules fit without issue.

Integrated 2.5 A Eurorack power supply per channel

The fixed bus boards provide ample power and keyed connectors to connect up to 32 modules without the risk of polarity reversal. The case delivers up to 2.5 A on both the +12 V and -12 V lines, with a rated ripple of 100 mV at full load: an adequate reserve even for systems packed with digital modules. 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 enclosure is powered by an included external 12 V power supply, featuring a 2.1 mm center-positive barrel connector, and includes a power switch.

ALM Accessories and Chassis Lineup

For the 9U, 84 HP format, the Decksaver cover is available separately; it is ideal for protecting modules and knobs during transport. The ALM chassis lineup also includes 3U and 6U 84 HP and 3U and 6U 52 HP formats, as well as a 3U 84 HP 19-inch rack-mountable version, allowing you to expand your system while maintaining the same build quality.

Technical Specifications

• Brand: ALM Busy Circuits
• Model: 9U 84 HP Eurorack case with power supply
• Format: 9U (3 rows of 3U), 84 HP
• Construction: Anodized aluminum
• Power supply: up to 2.5 A at +12 V and up to 2.5 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 32 modules
• Effective depth: up to 42 mm
• Mounting: fixed rails with M3 threads
• Power switch
• Rubber feet
• External power supply included: 12 V DC, 2.1 mm barrel connector (positive center)
• External dimensions: 440 x 396 x 66 mm
• Weight: approximately 2.4 kg
• Optional accessories: Decksaver cover (sold separately)