Recessed Low-Voltage In-Wall Box

Ideal Use Cases

The SANUS ELM803-B1 is intended for flat-panel TV installations where visible low-voltage cables would interrupt the finished look of the wall. Positioned behind a wall-mounted TV, the recessed box creates a dedicated cavity for routing cables and wires into the wall. Its 56 cubic inches of interior space gives those cables a defined place to sit rather than remaining exposed between the display and the wall. It is especially relevant when the goal is to position the TV as flush with the wall as possible and keep the installation visually clean.

Why Choose This Model

This model combines concealment space and routing access in one in-wall component. The 56-cubic-inch cavity accommodates cables, while built-in cable-routing holes support deliberate cable paths. Single-gang low-voltage pass-through inlet/outlet knockouts add flexibility for bringing cables into and out of the wall. The box can be used behind mounts with ClickFit compatibility as well as mounts without it, so ClickFit is not a requirement for selecting the ELM803. For a project centered on concealed low-voltage cabling, these features address the core installation task directly.

Installation and Integration

Installation begins by creating an opening behind the wall-mounted TV and fitting the ELM803 into that opening. The intended placement keeps the cable cavity within the area concealed by the display. Low-voltage cables and wires can then be directed through the cable-routing holes and the applicable single-gang pass-through inlet or outlet knockout. This arrangement moves cabling away from the visible wall surface and into the wall cavity. Because the product data identifies support for mounts with or without ClickFit compatibility, the box can be integrated according to the mount already selected rather than requiring a ClickFit-specific installation.

Plan the box location around the display and cable route before making the opening. The available source data does not provide dimensions, wall-construction requirements, included hardware, or instructions, so those details should be confirmed from the product documentation before installation.

Performance Highlights

The ELM803’s performance is practical: it manages and conceals low-voltage cables while helping the television sit close to the wall. Its stated 56 cubic inches of space is the key capacity figure, giving installers a concrete basis for evaluating cable storage needs. Routing holes organize the path through the enclosure, and the single-gang inlet/outlet knockouts provide defined pass-through points. Together, these elements create a clean cable cavity behind the TV and reduce the amount of cabling that remains visible around the installation.

What Makes It Different

What distinguishes this model in the supplied product data is the combination of a recessed cavity, multiple routing provisions, and broad mount use. It is not described merely as an open pass-through: the enclosure offers 56 cubic inches in which cables can be held. It also pairs cable-routing holes with single-gang low-voltage inlet/outlet knockouts, addressing both storage and passage through the wall. Compatibility with mounts both with and without ClickFit further separates the box from an accessory that would be limited to one mount interface.

Final Assessment

The SANUS ELM803-B1 is a focused installation accessory for concealing low-voltage cabling behind a wall-mounted flat-panel TV. Choose it when the project calls for a recessed 56-cubic-inch cable cavity, cable-routing holes, and single-gang low-voltage pass-through inlet/outlet knockouts. Its ability to work behind mounts with or without ClickFit compatibility makes it adaptable within the stated use case. The result is a cable route contained inside the wall and a seamless-looking television installation with fewer unsightly cables in view.