Atlas Sound AS-4T-B – 4" IP55 All-Weather Surface Mount Speaker Black (Pair)

Product Overview

The Atlas Sound AS-4T-B is a 4-inch all-weather commercial surface mount speaker in black finish, sold as a pair, engineered for 70V/100V distributed audio systems in indoor and outdoor commercial installations. The IP55-rated enclosure provides reliable protection against dust and water in demanding environments, while the high-efficiency 15-watt 70/100V transformer delivers frequency-flat performance across the critical speech and music bands. The black finish makes the AS-4T-B a natural choice for dark-ceiling spaces, outdoor entertainment areas, and installations where visual integration with a darker architectural palette is required.

Product Description

The AS-4T-B is built around a 4.5-inch woofer with dome tweeter in an ABS enclosure treated with UV inhibitor, providing durability in outdoor and semi-outdoor locations without degrading acoustic performance over time. The wave guide design is model-specific, developed through extensive laboratory measurement and listening tests to deliver even coverage for both speech intelligibility and music reproduction. The 15-watt transformer was specifically engineered for flatness in the frequency regions most important to intelligibility and musical detail — a distinction from standard commercial small speakers where transformer saturation produces audible midrange coloration during 70V operation. The color-matched black C-bracket with hardware covers provides a clean, finished appearance and preset adjustment angles that ensure consistent speaker aim across multiple units in a coverage zone. VESA-compatible mounting hardware is integrated into the enclosure, allowing third-party mounts to accommodate custom installation geometries where the standard C-bracket is insufficient. An optional universal mount is available separately for wider adjustment range. The powder-coated aluminum grille in black provides corrosion resistance in outdoor and high-humidity environments while maintaining visual consistency with the black enclosure and bracket. The AS-4T-B ships as a pair, reducing per-unit ordering overhead for standard two-speaker distributed audio deployment configurations. The speaker operates at 8 ohms in direct-coupled mode, providing compatibility with standard low-impedance amplifiers in addition to 70/100V distributed systems.

Key Features

• IP55 Ingress Protection Rating — Dust and water resistance for outdoor, semi-outdoor, and high-humidity indoor installations.
• 4.5" Woofer with Dome Tweeter — Full-range 2-way driver configuration for clear speech and accurate music reproduction.
• High-Efficiency 15W 70/100V Transformer — Engineered for frequency flatness in critical speech and music bands, reducing coloration common in standard small commercial speaker transformers.
• Model-Specific Wave Guide — Developed through laboratory testing and listening evaluation for even spatial coverage optimized to this driver configuration.
• ABS Enclosure with UV Inhibitor — Resists UV degradation for sustained outdoor performance in sun-exposed locations.
• VESA Mount Compatible — Built-in VESA-standard hardware enables use of third-party mounting brackets for custom installation geometries.
• Color-Matched Black C-Bracket Included — Black bracket with hardware covers and preset adjustment angles provides clean, consistent installation appearance.
• Powder-Coated Aluminum Grille — Corrosion-resistant black grille for outdoor and moisture-prone environments.
• 8-Ohm Passive Design — Compatible with both 70/100V transformer systems and direct 8-ohm amplifier outputs.
• Sold as Pair — Two speakers per order simplifies procurement and reduces per-unit cost for standard two-speaker coverage zones.

Typical Applications

• Commercial meeting space
• Conference room
• House of worship
• Multi-purpose room
• Government space
• Training room
• Boardroom

Technical Specifications

Frequently Asked Questions

Q: What is the difference between the AS-4T-B and AS-4T-W?

A: The two models are identical in all acoustic and electrical specifications. The AS-4T-B is black with color-matched hardware and grille; the AS-4T-W is white. Select based on the installation environment’s aesthetic requirements.

Q: Can the AS-4T-B be installed outdoors?

A: Yes. The IP55 rating indicates protection against dust and water jets from any direction. The ABS enclosure includes UV inhibitor for resistance to UV-related material degradation in outdoor, sun-exposed locations.

Q: Is the AS-4T-B compatible with both 70V and 100V systems?

A: Yes. The built-in transformer supports both 70V and 100V distributed audio systems.

Q: How many speakers does this listing include?

A: The AS-4T-B is sold as a pair — two speakers are included per order.

Q: What mounting options are available?

A: The included black C-bracket provides preset angle adjustment for surface mounting. VESA-compatible hardware is built into the enclosure for third-party mounts. An optional universal mount from Atlas Sound is available separately for wider angle adjustment range.

Q: Can the AS-4T-B be used on a standard 8-ohm amplifier output?

A: Yes. The speaker operates at 8 ohms for direct-coupled amplifier connection, in addition to the 70/100V transformer taps for distributed audio runs.