Atlas Sound SM12CXT-B 12" 2-Way Compression Driver Coaxial Surface Mount Speaker with 60-Watt 70V Transformer (Black)

Product Overview

The Atlas Sound SM12CXT-B is a black 12" two-way coaxial surface mount speaker designed for commercial sound reinforcement in large, reverberant spaces such as school auditoriums, gymnasiums, and sanctuaries. It pairs a 12" low-frequency transducer with a 1" exit compression driver and includes a 60-watt 70.7V/100V transformer, so it drops directly into distributed 70V audio systems or runs at 8 ohms with the transformer bypassed. With 99dB sensitivity and 250 watts of 8-ohm RMS power handling, a small number of these loudspeakers can cover a large room. The flyable wood enclosure gives integrators multiple suspension and wall-mount options.

Product Description

At the heart of the SM12CXT-B is the 12CXT60 coaxial assembly: a 12" low-frequency driver with a curvilinear treated-paper cone for reduced harmonic distortion, coaxially aligned with a 1" exit compression driver. A built-in crossover network handles the frequency transition between the two reproducers, and both drivers use permanently aligned copper voice coils on polyimide formers for low-distortion performance. Independent fuse protection guards the low- and high-frequency drivers against overload.

For commercial audio installation flexibility, the internal high-efficiency 60-watt transformer offers taps at 7.5, 15, 30, and 60 watts for 70.7V or 100V distributed lines, and can be bypassed entirely for direct 8-ohm operation with a professional power amplifier. Connections are made via a barrier strip input for 70.7V/100V/8-ohm wiring or a parallel 4-pole speakON input for 8-ohm operation. The input panel accepts a standard 4" square box cover (Raco 753 or equivalent), which matters on projects where flex conduit termination is required by code. The wood enclosure wears a durable black rough-coat finish with a heavy-duty metal grille, and twelve 1/4"-20 rigging inserts provide fly points for overhead suspension in nearly any orientation. The cabinet is also pre-drilled with T-nut inserts for OmniMount-style bracket wall mounting. The 90-degree conical dispersion pattern (2kHz octave band) delivers consistent coverage for paging, program audio, and speech reinforcement. Need this speaker in white for bright ceilings or light-colored walls? See the Atlas Sound SM12CXT-W white version.

Key Features

• 12" Coaxial Two-Way Design — Combines a 12" woofer and 1" exit compression driver on a single axis for coherent point-source sound.
• 60-Watt 70V/100V Transformer — Internal high-efficiency transformer with 7.5/15/30/60-watt taps integrates directly into distributed constant-voltage systems.
• Bypassable for 8-Ohm Operation — Run the speaker at its full 250-watt RMS rating from a low-impedance amplifier when higher output is needed.
• 99dB Sensitivity — High efficiency reduces the amplifier power required to reach target SPL in large rooms.
• Flyable Wood Enclosure — Twelve 1/4"-20 rigging inserts support overhead suspension in nearly any orientation.
• Dual Input Options — Barrier strip for 70.7V/100V/8-ohm wiring plus a parallel 4-pole speakON connector for 8-ohm use.
• Conduit-Ready Input Panel — Accepts a standard 4" square box cover for installations that require flex conduit termination.
• Driver Fuse Protection — Separate fuses protect the low- and high-frequency drivers from accidental overdrive.
• Wall-Mount Ready — Pre-drilled T-nut inserts accept OmniMount-style brackets; optional wall brackets available.

Typical Applications

• Auditorium sound reinforcement
• House of worship sanctuary systems
• Multi-purpose rooms and cafeterias
• All-hands rooms and commercial meeting spaces
• Training room program audio

Technical Specifications

Frequently Asked Questions

Can the SM12CXT-B work in both 70V and 8-ohm systems?
Yes. The internal 60-watt transformer provides 7.5/15/30/60-watt taps for 70.7V or 100V distributed lines, and it can be bypassed for direct 8-ohm operation at up to 250 watts RMS.

How do I suspend this speaker overhead?
The enclosure includes twelve 1/4"-20 threaded inserts that serve as fly points, allowing safe overhead suspension in most orientations using appropriately rated hardware. Always follow local rigging codes.

Does it support conduit termination?
Yes. The input panel is designed to accept a standard 4" square box cover (Raco 753 or equivalent) so flex conduit can be terminated directly at the speaker.

Is this speaker available in white?
Yes. The same loudspeaker in a white finish is sold as the SM12CXT-W.

What input connectors are provided?
A barrier strip handles 70.7V/100V/8-ohm wiring, and a parallel 4-pole speakON connector is provided for 8-ohm operation only.

What warranty and support apply?
AtlasIED warrants the SM12CXT-B for 60 months from purchase. For AV system integration questions or help selecting transformer taps for your design, contact Creation Networks.