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The VALCOM S-551-5 is a ceiling speaker backbox designed to provide an enclosed mounting cavity for in-ceiling speaker installations. The backbox mounts above the ceiling surface and surrounds the speaker basket, improving acoustic performance by isolating the driver from open plenum space. It is typically installed during rough-in or retrofit work and is suited for commercial and residential applications where code or design requirements call for an enclosed speaker cavity. HVAC technicians, low-voltage installers, and general contractors commonly encounter this component during ceiling speaker deployments.
The S-551-5 is packaged as a quantity of five units per order, making it practical for multi-room or multi-zone speaker projects. It fits into standard in-ceiling speaker cutouts and is appropriate for drop-ceiling and drywall ceiling installations where speaker enclosures are required. This product falls within the in-ceiling and in-wall speaker accessory category.
Designed as an OEM-style enclosure accessory for standard in-ceiling speaker installations. No specific compatible model numbers were provided in the product data.
Installation is typically performed by low-voltage technicians or general contractors during rough-in or finish phases of construction. The backbox should be secured above the ceiling substrate before the speaker is dropped in and terminated. Confirm local fire and plenum codes apply to the installation environment before selecting backbox materials. Disconnect all associated audio or low-voltage circuits before working in the ceiling cavity.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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