Middle Atlantic AX-SXR-21 – 21SP 20" Shallow AV Rack

Product Overview

The Middle Atlantic AX-SXR-21 provides 21 rack spaces within a 20-inch-deep enclosure, extending the Middle Atlantic AX-SXR shallow rack line into the territory of mid-to-large commercial AV builds. This 21U shallow AV equipment rack fits into depth-restricted wiring closets and AV rooms while offering more mounting capacity than smaller AX-SXR models. For integrators specifying a side-access rack commercial installation with 21 rack spaces, the AX-SXR-21 is purpose-built for the task.

Product Description

With 21 rack spaces at 20" of usable depth, the AX-SXR-21 crosses into the capacity range needed for larger conference rooms, auditorium AV racks, and multi-zone audio systems — all within a shallow form factor. The Side-X-Rail design means the tapped mounting rails are accessible laterally, a practical feature when the rack is positioned in a wiring closet or alcove with minimal front clearance. All 21 positions use 10-32 tapped rails; cage nuts are not required, which speeds equipment installation on commercial job sites. The all-steel enclosure handles the structural demands of heavy AV equipment including large power amplifiers and multi-slot signal processors. Side-access rack commercial applications benefit particularly from this model, where servicing from the front is impractical. Integrators will appreciate that the AX-SXR-21 is identical in depth, rail type, and accessory compatibility to the rest of the AX-SXR family — only the space count changes. The AX-SXR-21 ships floor-standing and works with Middle Atlantic AX blanks, power strips, and cable management accessories. Order at creationnetworks.net.

Key Features

• 21U Capacity — Twenty-one rack spaces for mid-to-large commercial AV builds.
• 20" Usable Depth — Shallow enclosure fits depth-constrained wiring closets and AV rooms.
• Side-X-Rail Access — Lateral rail access for tight commercial installation environments.
• 10-32 Tapped Rails — Standard direct-thread mounting; no cage nuts needed.
• 19" EIA-310 Compatible — Accepts all standard professional 19" rackmount equipment.
• Heavy-Duty Steel Frame — Supports large amplifiers and signal processors in permanent installs.
• AX Series Compatible — Works with Middle Atlantic AX blanks, power, and cable accessories.

Typical Applications

• Conference room and boardroom AV racks
• Auditorium and performance space AV equipment rooms
• Multi-zone audio system installations
• Side-access rack commercial deployments
• Large wiring closets requiring 21U shallow capacity

Technical Specifications

Frequently Asked Questions

Is the AX-SXR-21 appropriate for an auditorium AV rack?

Yes. The 21U capacity accommodates a full AV signal chain for small-to-mid auditoriums, and the shallow depth allows installation in back-of-stage or under-stage equipment rooms.

How does the side-access rail help in commercial projects?

In commercial environments, racks are often placed against walls or inside closets where front-only access is not practical. The SXR rail system lets technicians reach mounting positions from the side.

Does the AX-SXR-21 require any tools to install equipment?

A standard screwdriver or bit driver with 10-32 rack screws is all that is needed. No cage nut driver or cage nut inserts are required.

Can I mix 1U and 2U equipment in the same rack?

Yes. Any combination of 1U, 2U, and larger equipment can be installed as long as the total does not exceed 21U.

Where can I buy the AX-SXR-21?

The AX-SXR-21 is available at creationnetworks.net.