4″ Loudspeaker with 70.7V-4W Transformer and T720-4 Baffle

The AtlasIED BT720-4 is a complete in-ceiling loudspeaker package built around a 4-inch high-compliance driver. It combines the loudspeaker with a 4-watt 25V/70V transformer and the T720-4 torsion baffle, providing the principal components specified for installation in a suspended ceiling.

Ideal Use Cases

This model is intended for suspended-ceiling projects that require a compact transformer-equipped loudspeaker and baffle assembly. Its selectable 0.5, 1, 2, and 4-watt power taps accommodate designs that call for different transformer settings within the available range. The listed 135-degree dispersion also makes the BT720-4 relevant when a broad, documented coverage characteristic is part of the system specification. With the driver, transformer, and torsion baffle supplied as one package, it is suited to installations where these components are expected to be specified together.

Why Choose This Model

The BT720-4 brings its essential audio and installation components into one clearly defined assembly. At its center is a 4-inch, or 102 mm, high-compliance loudspeaker. The included transformer supports 25V/70V operation with four available power taps, while the T720-4 torsion baffle is designed for suspended ceilings. Its performance is documented through sensitivity, frequency-response, and dispersion ratings, giving system designers concrete figures for evaluation. The package also carries a warranty period of 60 months from the date of purchase.

Installation and Integration

The T720-4 torsion baffle is specifically described for use in suspended ceilings. The loudspeaker has a listed 4-inch diameter, also given as 10.16 cm, while the specified assembly depth is 3.64 inches, with 63 mm also provided in the source data. These measurements should be considered when planning the available ceiling space and placement. The transformer is rated at 4 watts and supports 25V/70V systems. Available tap values are 0.5, 1, 2, and 4 watts, allowing the selected transformer setting to follow the requirements of the planned installation.

Performance Highlights

The BT720-4 has a stated frequency response of 150 Hz to 17 kHz. Sensitivity is rated at 94 dB measured at 1 watt and 1 meter. Its specified dispersion is 135 degrees at the -6 dB points in the 2 kHz octave band. Together, these figures define the model’s stated output sensitivity, usable frequency range, and measured coverage characteristic. The four transformer taps provide additional system-design flexibility within the unit’s 4-watt rating, ranging from the 0.5-watt setting through the full 4-watt tap.

What Makes It Different

This product is presented as a complete assembly rather than only a standalone loudspeaker. The package includes the 4-inch high-compliance driver, a 4-watt 25V/70V transformer, and the model-specific T720-4 torsion baffle. That configuration keeps the principal product elements under a single model designation while retaining four selectable power taps. The combination of a compact 4-inch diameter, documented 135-degree dispersion, and suspended-ceiling baffle distinguishes its intended format and application from an unspecified loose driver or baffle-only product.

Final Assessment

The AtlasIED BT720-4 is a focused choice for suspended-ceiling specifications requiring a 4-inch loudspeaker, transformer, and torsion baffle in one package. Its 94 dB sensitivity, 150 Hz to 17 kHz frequency response, 135-degree dispersion, and four power taps provide the key figures needed for product comparison and system planning. For projects aligned with its 25V/70V transformer configuration and stated dimensions, it offers a well-defined combination of installation components and published performance data, backed by a 60-month warranty from the date of purchase.