Atlas Sound SD72W-KIT4 – 8" In-Ceiling Speaker Complete 4-Pack Kit

Product Overview

The AtlasIED SD72W-KIT4 is a complete four-speaker in-ceiling installation kit designed to simplify procurement and installation for commercial background music and paging systems. Each kit includes four SD72W dual-cone 8" speakers with 70V transformers, four CS95-8 back boxes, four 81-8R T-bar tile bridges, and 100 feet of 18-gauge speaker wire — everything required for a four-drop ceiling installation. Long-tail search applications include 8-inch in-ceiling speaker kit for background music, complete commercial ceiling speaker install kit with back box, and 70V speaker package for BGM and paging.

Product Description

The SD72W-KIT4 bundles all components needed to install four ceiling speakers in a drop-tile ceiling environment, reducing the number of separate SKUs an integrator needs to source and track. The SD72W speaker itself represents the next generation of AtlasIED's high-performance cone speaker line, maintaining the sonic characteristics established by the widely deployed C-Series, which means integrators familiar with that product line know exactly what to expect acoustically. The 8" dual-cone design with a 10 oz. ceramic magnet and curvilinear treated-paper cone reduces harmonic distortion compared to flat cone alternatives. A full 1" diameter copper voice coil with black anodized aluminum former provides improved power dissipation at continuous operation levels. The factory-installed 25V/70.7V line matching transformer includes tap selections from 0.25 to 5 watts for flexible zone loading. The speaker operates from 45 Hz to 19 kHz with a 97 dB sensitivity and 105-degree dispersion angle, making it well-suited to commercial spaces with 8–12 foot ceilings. The CS95-8 recessed round stacking enclosure is a one-piece CRS steel construction with four 1/2"-3/4" combination conduit knockouts, four J-clips, and two flexible perforated mounting straps, finished in epoxy over patch-jute lining. The 81-8R T-bar tile bridge features a round cut-out matched to the CS95-8 enclosure and is constructed from 24-gauge CRS with an electrogalvanized rust-resistant finish. The included 100-foot roll of 18-gauge 2-conductor speaker wire provides the interconnect needed for one typical installation zone.

Key Features

• Complete 4-Speaker Kit — All components included: speakers, back boxes, T-bar bridges, and speaker wire — no separate ordering required.
• 8" Dual-Cone SD72W Speaker — Curvilinear treated-paper cone with 10 oz. ceramic magnet delivers low-distortion commercial audio performance.
• 1" Copper Voice Coil — Black anodized aluminum former improves power dissipation for continuous operation.
• 25V/70V Transformer (0.25–5W Taps) — Factory-installed transformer with multiple tap selections for flexible distributed system design.
• 97 dB Sensitivity — High sensitivity rating reduces amplifier power requirements for the same SPL output.
• 105-Degree Dispersion — Wide coverage angle reduces speaker density needed for even coverage in commercial spaces.
• CS95-8 Back Box Included — One-piece CRS enclosure with conduit knockouts, J-clips, and mounting straps provides code-compliant ceiling installation.
• 81-8R T-Bar Bridge Included — 24-gauge electrogalvanized CRS tile bridge with round cut-out matches the CS95-8 enclosure.
• 100 ft. 18 AWG Speaker Wire Included — Covers typical single-zone wiring needs without a separate order.

Typical Applications

• Conference room
• Commercial meeting space
• Multi-purpose room
• Training room
• All-hands room
• Government space

Technical Specifications

Frequently Asked Questions

Q: What is included in the SD72W-KIT4?

A: The kit includes four SD72W 8" dual-cone in-ceiling speakers with 25V/70V 5W transformers and 62-8 baffles, four CS95-8 recessed enclosures, four 81-8R T-bar tile bridges, and one 100-foot roll of 18 AWG 2-conductor speaker wire.

Q: Is this kit compatible with drop-tile ceilings?

A: Yes. The 81-8R T-bar tile bridge is specifically designed for drop-tile ceiling grid installations, and the CS95-8 enclosure accommodates this installation type.

Q: Can the SD72W be used on a standard 70V distributed audio system?

A: Yes. The factory-installed 70.7V transformer connects directly to a 70V distributed amplifier. Tap selections range from 0.25 to 5 watts.

Q: How much speaker wire is included and is it sufficient for a standard installation?

A: The kit includes one 100-foot roll of 18 AWG 2-conductor wire, which is sufficient for a single zone of four speakers in a typical commercial room with central amplifier placement. Larger runs may require additional wire.

Q: What is the difference between the SD72W and the older C-Series speakers?

A: The SD72W is the next-generation successor to the C-Series and is intentionally designed to maintain the same sonic character. Contractors familiar with AtlasIED C-Series installations will experience consistent audio quality when transitioning to SD72W.

Q: Does the back box require conduit?

A: Conduit is not required but is supported. The CS95-8 enclosure includes 1/2"-3/4" combination conduit knockouts for installations where conduit is required by code.