A typical 20-output XLR distribution box measures approximately 19 inches wide, 3.5 inches high (1U), and 6–8 inches deep.

Typical Dimensions and Form Factor

Most 20-channel XLR distribution boxes are designed to fit standard 19-inch rack mounts, making them 1U in height (about 44–45 mm). The depth can vary depending on the manufacturer and internal circuitry, but it generally ranges from 6 to 8 inches (150–200 mm) to accommodate XLR connectors, internal wiring, and strain relief . The width is standardized at 19 inches (482.6 mm) to fit in professional audio racks.

Features Affecting Size

• XLR Connectors: 20 female XLR outputs require careful spacing to prevent cable crowding.
• Rack Mounting: Most units include rack ears for secure installation.
• Internal Components: Transformers, active circuitry, or isolation features can slightly increase depth.
• Cable Management: Some boxes include angled or recessed connectors to reduce strain on cables.

Practical Considerations

• Weight: A fully populated 20-channel box can weigh between 5–10 lbs (2.3–4.5 kg) depending on materials.
• Port Layout: Outputs are usually arranged in two rows of 10 or a single row with staggered spacing.
• Mounting Options: Floor-standing or wall-mounted versions may have slightly different dimensions but generally follow the same width and height standards. For exact dimensions, it is recommended to consult the manufacturer's datasheet or product page, as variations exist between brands and models .