Atlas Sound FC104T72 – 4" Ceiling Speaker with 25V/70V Transformer

Product Overview

The Atlas Sound FC104T72 is a compact 4-inch full-range in-ceiling loudspeaker equipped with a factory-installed LT-72 transformer, making it a direct-fit solution for 25V and 70V distributed audio systems. Designed for commercial public address and background music installations, it delivers wide-angle dispersion that reduces the total number of speakers needed to achieve uniform coverage. This U.S.-made speaker is UL1480 listed for general signaling and UL2043 certified for air plenum installation, giving integrators confidence in code-compliant deployments. Compatible with the full range of Atlas Sound 4-inch grilles, it integrates cleanly into finished ceiling environments across healthcare, education, retail, and hospitality facilities.

Product Description

The FC104T72 features a damped, high-compliance cone that provides smooth extended frequency response and accurate low-frequency reproduction in ceiling-mounted configurations. A 135-degree dispersion angle at the 2kHz octave band means fewer speakers are required per zone compared to narrow-dispersion alternatives, reducing material and labor costs on larger projects. The built-in 4-watt LT-72 transformer supports four power tap settings—0.5W, 1W, 2W, and 4W—allowing system designers to balance line loading across zones with precision. The 10-ounce ceramic magnet delivers a flux density of 10,500 gauss, contributing to the unit's 94dB sensitivity rating measured at 1 watt, 1 meter. A dual-purpose mounting bracket positions the transformer in a low-profile orientation and supports torsion spring mounting common to many AtlasIED baffles. The speaker is constructed in the United States and carries a 60-month warranty from date of purchase. Optional hydrophobic treatment coatings are available for installations in humid or washdown-prone environments. This model is part of the FC104 series, which spans multiple transformer configurations to address a wide range of 70V system design requirements.

Key Features

• 25V/70V Transformer Included — Factory-installed LT-72 transformer with 0.5W, 1W, 2W, and 4W tap settings for flexible zone balancing.
• Wide Dispersion Angle — 135° dispersion at 2kHz reduces the number of speakers needed for full coverage.
• High Sensitivity — 94dB (1W/1m) sensitivity rating supports efficient power use in large distributed systems.
• High-Compliance Cone — Damped cone design provides smooth extended response from 100Hz to 10kHz.
• Dual-Purpose Bracket — Supports low-profile transformer positioning and torsion spring mounting on AtlasIED baffles.
• UL Listed — Certified to UL1480 for general signaling and UL2043 for air plenum installations.
• U.S. Manufactured — Domestic production with 60-month warranty coverage.
• Atlas Sound Grille Compatible — Accepts the full selection of Atlas Sound 4-inch grilles for a clean finished appearance.

Technical Specifications