Atlas Sound SM8CXT-B – 8" Coaxial Surface Mount Speaker 70V (Black)

Product Overview

The Atlas Sound SM8CXT-B is an 8-inch 2-way coaxial surface mount speaker designed for commercial sound reinforcement in venues that require high output, wide dispersion, and 70V distributed audio compatibility. The speaker pairs an 8-inch low-frequency transducer with a 1-inch exit compression driver in a flyable wood enclosure, making it a capable choice for auditoriums, gymnasiums, and houses of worship. With a built-in 60-watt 70.7/100V transformer and 8-ohm bypass capability, the SM8CXT-B integrates directly into both 70V distributed audio systems and low-impedance amplifier outputs. Its 90-degree conical dispersion pattern and 92dB sensitivity make it well-suited for coverage-critical commercial applications.

Product Description

The SM8CXT-B houses the SM8CXT60 coaxial driver — a 150-watt transducer combining a curvilinear polypropylene cone woofer and a 1-inch compression driver, factory-matched via a built-in crossover network for proper frequency transition. The compression driver and low-frequency transducer feature permanently aligned voice coils to minimize distortion, with Polyimide voice coil formers on both copper coil assemblies for thermal stability under extended operation.

The enclosure is constructed from wood with a durable black rough-coat finish and covered by an attractive heavy-duty metal grille assembly. Twelve 1/4"-20 threaded inserts are distributed around the enclosure for overhead suspension in a wide variety of orientations, making rigging straightforward without custom hardware. The input panel accepts a standard 4-inch square box cover (Raco 753 or equivalent), which is useful in installations requiring flex conduit termination — a practical detail for commercial code-compliance work. Pre-drilled T-nut inserts accommodate Omnimount-compatible wall mount brackets (sold separately). Input connections include both a barrier strip for 70.7/100V or 8-ohm operation and a parallel 4-pole Speakon input for 8-ohm direct amplifier connection. Fuse protection is included for both the LF and HF driver sections. Power taps on the 70V transformer are 7.5, 15, 30, and 60 watts, providing zoning flexibility in distributed systems.

Key Features

• 8" Coaxial Compression Driver — Combines an 8-inch polypropylene woofer and 1-inch exit compression driver in a coaxial configuration for coherent, time-aligned audio across the coverage area.
• Built-In 60W 70.7/100V Transformer — Factory-installed transformer integrates directly into 70V distributed audio systems at 7.5, 15, 30, or 60-watt taps, with bypass for 8-ohm direct drive.
• 90° Conical Dispersion — Wide, even coverage pattern measured at the 2kHz octave band supports broad seating areas without requiring additional fill speakers.
• Flyable Wood Enclosure — Twelve 1/4"-20 inserts provide multiple fly point options for overhead suspension in auditoriums, gymnasiums, and large commercial venues.
• Dual Input Connections — Barrier strip input supports 70.7V, 100V, or 8-ohm operation; parallel Speakon NL4 input supports 8-ohm direct drive from a power amplifier.
• Flex Conduit-Compatible Input Panel — Input panel accepts a standard 4-inch square electrical box cover for installations where flex conduit termination is required for code compliance.
• Fuse Protection — Separate fuse protection on LF and HF driver sections prevents single-driver failures from disabling the full speaker.
• Permanently Aligned Voice Coils — Factory-aligned LF and HF voice coils maintain phase coherence and low distortion across the crossover transition region.

Typical Applications

• House of worship main or fill speaker
• School auditorium sound reinforcement
• Gymnasium distributed audio system
• Multi-purpose room surface mount speaker
• Cafeteria commercial-grade background music and paging

Technical Specifications

Frequently Asked Questions

Q: Can the SM8CXT-B be used on a standard 8-ohm amplifier output?

A: Yes. The built-in 70V transformer can be bypassed for direct 8-ohm operation. Use the Speakon NL4 input or the barrier strip configured for 8-ohm for direct amplifier connection up to 150 watts RMS.

Q: What wall mount bracket fits the SM8CXT-B?

A: The enclosure is pre-drilled with T-nut inserts compatible with Omnimount-pattern brackets. Atlas Sound offers optional brackets for wall mounting; consult the product documentation for compatible bracket part numbers.

Q: How is the speaker suspended for overhead rigging?

A: Twelve 1/4"-20 threaded inserts are distributed around the cabinet, allowing the installer to configure fly points for a wide range of hanging orientations. Always follow manufacturer and local rigging standards when suspending loudspeakers overhead.

Q: What power tap should I select for a 70V zone?

A: Available taps are 7.5, 15, 30, and 60 watts. Select the tap based on your zone power budget and amplifier load calculations. In most commercial background music applications a 15W or 30W tap is appropriate.

Q: Is fuse replacement user-serviceable?

A: The SM8CXT-B includes separate fuse protection for LF and HF drivers. Check the product documentation for fuse ratings and replacement procedure. Contact Atlas Sound technical support for service guidance.

Q: What is the warranty on the SM8CXT-B?

A: Atlas Sound products carry the manufacturer's standard commercial warranty. Contact Creation Networks for current warranty terms and authorized service information.