Atlas Sound FC104T – 4" Ceiling Speaker with 70.7V 8W Transformer

Product Overview

The Atlas Sound FC104T is a compact 4-inch full-range in-ceiling loudspeaker with a built-in 70.7V transformer, designed for commercial public address and background music distribution systems. The transformer provides five power tap settings—0.5W, 1W, 2W, 4W, and 8W—giving system designers maximum flexibility when balancing line loading across large 70V distributed audio zones. With a 135-degree dispersion angle and 94dB sensitivity, the FC104T achieves broad coverage per speaker position, reducing the number of units required per zone. It is UL1480 certified for general signaling applications and is part of the FC104 series, a widely-deployed platform in commercial AV installations.

Product Description

The FC104T features a damped high-compliance cone that delivers smooth extended frequency response from 150Hz to 17kHz with accurate low-frequency reproduction for voice and music applications. The wide 135-degree dispersion angle at the 2kHz octave band means each speaker covers a larger floor area, lowering material costs and installation time on large-scale distributed audio projects. The new transformer design included with the FC104T supports tap settings from 0.5W up to 8W, enabling precise zone balancing across systems of varying sizes. Sensitivity is rated at 94dB at 1 watt, 1 meter—consistent with other speakers in the FC104 series—allowing predictable SPL calculations when using Atlas Sound's system design tools. The speaker measures 4 inches deep and accepts the full range of Atlas Sound 4-inch grilles for a finished ceiling appearance. Optional hydrophobic treatment coatings are available for installations in humid or washdown environments. The FC104T is UL1480 listed and carries a 60-month warranty from date of purchase. It is a direct-fit replacement or upgrade path for existing FC104 series installations requiring extended transformer tap range.

Key Features

• 70.7V Transformer with 5 Tap Settings — 0.5W, 1W, 2W, 4W, and 8W taps for precise zone load balancing in large systems.
• Wide 135° Dispersion — Broad coverage per speaker position reduces total speaker count per zone.
• 94dB Sensitivity — High sensitivity rating supports efficient power use and predictable SPL planning.
• High-Compliance Cone — Damped cone design delivers smooth response from 150Hz to 17kHz.
• UL1480 Listed — Certified for general signaling applications in commercial installations.
• Atlas Sound Grille Compatible — Accepts the full range of Atlas Sound 4-inch grilles for finished ceiling integration.
• Optional Hydrophobic Coating — Available for humid or washdown-rated deployment environments.
• 60-Month Warranty — Covered under Atlas Sound's standard extended warranty period.

Technical Specifications