Atlas Sound B51-4 – 4" In-Ceiling Speaker 25V/70V Transformer Package
Atlas Sound B51-4 – 4" In-Ceiling Speaker 25V/70V Transformer Package is backordered and will ship as soon as it is back in stock.
Shipping Availability*
Shipping Availability*
Free Ground Shipping on Most Orders Over $250.00
Looking for the best price or expert advice? Give us a call at 1-888-230-3661 or use the Live Chat below. Buying 1 or 100, you may qualify for greater savings beyond the advertised price.
Atlas Sound B51-4 – 4" In-Ceiling Speaker 25V/70V Transformer ...
Product Overview
The Atlas Sound B51-4 is a factory-assembled 4" in-ceiling speaker package designed for commercial distributed audio systems. It combines the AtlasIED FC104 high-compliance loudspeaker with a dual-voltage 25V/70.7V transformer and a 51-4 round baffle for suspended ceiling installations. This all-in-one package saves installation time and is ideal for background music and paging in retail, hospitality, office, and institutional environments. The unit ships pre-assembled and ready to install, including torsion spring mounting hardware.
Product Description
The B51-4 is part of Atlas Sound's B Series loudspeaker assemblies, which pair the full-range FC104 driver with a factory-mounted transformer and baffle to simplify the procurement and installation process. The FC104 driver employs a 10-ounce ceramic magnet and a damped, high-compliance cone that delivers smooth extended low-frequency response suited to both voice paging and background music applications. The dual-voltage 25V/70.7V transformer provides five power tap settings, allowing the integrator to precisely manage load distribution across a 70V distributed system. Sound dispersion measures 135 degrees at -6dB at 2kHz, enabling wide-area coverage with fewer ceiling penetrations in open-plan spaces. The round 51-4 baffle features a finished grille for a clean ceiling appearance. EZB models include the patented EZ-Mount support system with adjustable rails, eliminating the need for a separate tile bridge in suspended ceiling tile installations. All assemblies are CUL listed and compatible with optional HydroFobic moisture-resistant coating for humid or semi-outdoor environments. The 60-month warranty underscores the product's fit for permanent commercial installation.
Key Features
- Factory-Assembled Package — Speaker, transformer, and baffle shipped pre-built to reduce on-site labor.
- Dual-Voltage 25V/70.7V Transformer — Supports both 25V and 70.7V distributed systems with five selectable watt taps.
- High-Compliance 4" FC104 Driver — 10 oz. ceramic magnet and damped cone for full-range voice and music reproduction.
- 135° Wide Dispersion — Broad coverage pattern at 2kHz reduces the number of speakers required per zone.
- Power Taps: 0.25, 0.5, 1, 2, 4W — Fine-grained load control for balanced 70V system design.
- EZ-Mount Option Available — Adjustable support rails for suspended ceiling tile installations without a tile bridge.
- CUL Listed — Meets safety certification requirements for commercial installation.
- 60-Month Warranty — Long-term reliability assurance for permanent installs.
Technical Specifications
| Specification | Value |
|---|---|
| Speaker Size | 4" (102mm) High-Compliance Loudspeaker |
| Frequency Response | 150Hz – 17kHz |
| Sensitivity | 94dB (1W/1m) |
| Power Taps | 0.25, 0.5, 1, 2, 4 Watts (25V/70.7V) |
| Dispersion | 135° / -6dB at 2kHz |
| Mounting Depth | 2 1/4" (5.72cm) |
| Baffle Diameter | 4" (10.16cm) |
| Certifications | CUL Listed |
| Warranty | 60 months from date of purchase |
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006
