4" FS Series Surface Mount, Passive, White

The AtlasIED FS-4T-W is a white, passive 4-inch FS Series surface-mount loudspeaker designed for high-fidelity audio in commercial environments. Its two-way, full-range design incorporates IsoFlare™ technology and combines broad 115° conical coverage with flexible transformer taps and Low Z operation. With a frequency range of 63Hz–30kHz, 60W average power handling, and a compact surface-mount enclosure, this model balances audio performance with practical system integration.

Ideal Use Cases

The FS-4T-W is intended for commercial installations that require a compact, full-range surface-mount speaker with wide, conical coverage. Its white finish makes it an appropriate choice when the loudspeaker needs to coordinate with light-colored walls, ceilings, or surrounding architectural elements. The 115° nominal conical coverage pattern can serve listening areas where broad dispersion is preferred, while the selectable transformer taps and Low Z mode accommodate different system configurations.

Its 63Hz–30kHz frequency range and 83Hz–22kHz response at ±3dB support both spoken content and full-range program material. The speaker can therefore be considered for commercial environments where intelligibility, musical detail, and consistent coverage are important system requirements.

Why Choose This Model

This model combines a manageable enclosure size with substantial output capability. System sensitivity is rated at 87dB with 1W at 1 meter, while rated maximum SPL averages 105dB. With the maximum transformer tap, rated maximum SPL averages 102dB. Power handling is specified at 60W average, 80W programme, and 240W peak, giving system designers concrete ratings for matching the loudspeaker to the intended application.

AtlasIED recommends amplifier power of 120W at 8 ohms. The speaker’s nominal impedance is 8 ohms, and Low Z operation is available alongside transformer taps of 30W, 15W, 7.5W, and 3.8W, with a 1.9W tap for 70V operation.

Installation and Integration

The FS-4T-W is a surface-mount loudspeaker measuring 10.9 inches high by 6.88 inches wide by 8.07 inches deep, or 277mm by 175mm by 205mm. It weighs 7.72 pounds, or 3.5 kilograms. These published dimensions and weight provide the essential information needed when evaluating placement, mounting surfaces, clearances, and installation access.

Integration options include 8-ohm Low Z operation and multiple transformer tap settings. This flexibility allows the model to be configured for different amplifier and distributed-audio arrangements without changing to a separate speaker model. The selected operating mode, transformer tap, and amplifier should be matched to the overall system design. AtlasIED specifies recommended amplifier power at 120W into 8 ohms.

Performance Highlights

• Two-way, full-range surface-mount loudspeaker design
• IsoFlare™ technology for high-fidelity audio reproduction
• 63Hz–30kHz frequency range measured at -10dB
• 83Hz–22kHz frequency response measured at ±3dB
• 87dB system sensitivity measured with 1W at 1 meter
• 115° conical nominal coverage angle measured at -6dB
• 60W average, 80W programme, and 240W peak power handling
• 105dB rated maximum SPL average
• 102dB rated maximum SPL average with the maximum transformer tap
• Directivity index of 6.1dB

What Makes It Different

The FS-4T-W brings together IsoFlare™ technology, a two-way full-range configuration, and unusually broad stated frequency extension for a compact 4-inch surface-mount model. Its 115° conical coverage provides a clear basis for system layout, while the published sensitivity, SPL, directivity, and power ratings support informed equipment selection.

The combination of selectable transformer taps and Low Z operation is another defining feature. Rather than being limited to a single connection approach, the speaker offers 30W, 15W, 7.5W, and 3.8W taps, a 1.9W option for 70V operation, and an 8-ohm nominal configuration.

Final Assessment

The AtlasIED FS-4T-W is a well-specified choice for commercial audio systems requiring a white, passive 4-inch surface-mount loudspeaker. Its broad conical coverage, full-range performance, multiple operating options, and detailed power ratings give integrators the information needed to plan a compatible system. A 60-month warranty from the date of purchase further supports its role as a long-term installed-audio component.