Atlas Sound C803AT47 – 8" Coaxial In-Ceiling Speaker 70V 4W

Product Overview

The Atlas Sound C803AT47 is an 8" coaxial in-ceiling loudspeaker with a factory-installed 70.7V 4-watt line-matching transformer, designed for commercial paging and background music distribution systems. It delivers a 120° dispersion pattern and a frequency response of 60 Hz to 12 kHz, making it effective for intelligible speech and ambient music in commercial, institutional, and industrial environments. The speaker is UL certified to UL1480A and UL2043, meeting fire and safety code requirements for public address installations.

Product Description

The C803AT47 combines a full-size 8" (203 mm) low-frequency woofer and a 3" (76 mm) post-mounted tweeter in a coaxial configuration. The two drivers are coupled through a built-in crossover network, providing coherent sound reproduction from a single point source. The post-mounted tweeter also adds structural reinforcement to the assembly, improving long-term durability. The 10 oz. (260 g) ceramic magnet woofer and 2.35 oz. (67 g) ceramic magnet tweeter deliver a peak sensitivity of 98 dB (1W/1m), ensuring adequate coverage even in moderate-noise environments. Transformer power taps are provided at 0.5, 1, 2, and 4 watts, giving system designers flexibility to balance coverage density and amplifier load across 70V distributed audio zones. The 120° dispersion angle enables wide coverage from ceiling-mounted positions, reducing the number of speakers needed per zone. The C803AT47 mounts in a wide variety of AtlasIED baffles and enclosures, with an optimum sealed enclosure volume of 0.36 cu. ft. The speaker is suitable for offices, retail spaces, schools, healthcare facilities, and houses of worship where voice intelligibility and background music quality are priorities.

Key Features

• 8" Coaxial Driver — Combined woofer and tweeter for point-source coverage from a single ceiling opening.
• Factory-Installed 70.7V Transformer — 4W maximum tap; power taps at 0.5, 1, 2, and 4 watts for system flexibility.
• 120° Dispersion Pattern — Broad, uniform coverage reduces speaker count per zone.
• 98 dB Peak Sensitivity — Adequate output for commercial paging in ambient noise environments.
• Post-Mounted Tweeter — Adds structural strength and enhances high-frequency imaging.
• UL1480A and UL2043 Listed — Meets fire and safety requirements for use in air-handling spaces.
• Wide Baffle Compatibility — Mounts in AtlasIED commercial baffles and enclosures.

Technical Specifications