Description
Protect speaker installations in plenum return-air ceilings with the S-551-5, a five-pack of Valcom steel ceiling speaker backboxes with fire-retardant dampening material already installed for code-compliant plenum deployments.
The Telecom Spot Expert Review
Plenum-rated backboxes are not optional when your ceiling is part of the HVAC return air path — fire codes require the fire retardant lining that the S-551-5 includes. Buying in packs of five keeps job site inventory tidy and cuts the per-unit cost. The five knockout options give installers flexibility for conduit or cable routing from any direction, so you are not locked into a single entry point at the ceiling box.
Key Features
- Plenum-rated fire retardant dampening material — meets return-air ceiling code requirements
- 5 knockouts for flexible conduit and cable routing
- Sturdy steel construction for long-term rigidity above the ceiling
- Sold in packs of 5 — efficient for multi-room and multi-floor installations
- Compatible with Valcom ceiling speaker models requiring backbox support
Technical Specifications
| Model | S-551-5 |
|---|---|
| Quantity | 5 per pack |
| Material | Steel |
| Knockouts | 5 |
| Plenum Rating | Fire Retardant Dampening Material Included |
| Application | Plenum Return-Air Ceiling Speaker Installations |