Atlas Sound SM191-78 – Deluxe 8" Surface Mount Square Enclosure 4" Deep

Product Overview

The Atlas Sound SM191-78 is a deluxe 8-inch surface mount square speaker enclosure, 4 inches deep, designed to improve low-frequency performance of commercial and professional 8-inch speakers in applications where in-ceiling installation is not available. Constructed from heavy-gauge cold-rolled steel with combination conduit knockouts and finished in textured white epoxy, the SM191-78 provides the acoustic loading required for fuller bass response from surface-mounted speakers in commercial AV environments.

Product Description

The SM191-78 addresses one of the most common acoustic challenges in commercial AV: deploying 8-inch speakers in surface-mount positions without sacrificing low-frequency performance. The extra-depth enclosure design increases internal volume, which extends bass response by providing additional acoustic loading for the driver — a meaningful improvement in any installation where a speaker must operate without a large back cavity. The heavy-gauge CRS construction provides the structural rigidity needed to minimize cabinet resonance, and the generous acoustic fiberglass lining inside the enclosure absorbs standing wave energy to achieve a fuller, richer bass output. The textured white epoxy surface finish is designed for commercial interior environments, blending with standard ceiling and wall surfaces. Combination conduit knockouts allow the installer to route speaker cable from multiple directions. The SM191-78 is compatible with a broad range of Atlas Sound square speaker baffles, giving the integrator flexibility to select the appropriate grille and speaker combination for each specific project. At 4.50 lbs shipping weight, the enclosure is manageable for a single installer during ceiling-level or high wall mounting work. The 60-month warranty is consistent with Atlas Sound’s standard commercial product coverage.

Key Features

• Acoustic Fiberglass Lining — Generous interior lining absorbs resonance and extends low-frequency response for fuller bass output.
• Heavy-Gauge CRS Construction — Rigid cabinet walls minimize mechanical resonance that degrades bass performance.
• Textured White Epoxy Finish — Durable commercial-grade surface finish for interior wall and ceiling installations.
• Combination Conduit Knockouts — Allows flexible cable routing from multiple entry angles.
• Atlas Sound Baffle Compatible — Mounts a variety of Atlas Sound square speaker baffles for project-specific flexibility.

Technical Specifications