Dolby MA390C – SLS 3-Axis Coaxial Overhead Speaker

What is the Dolby SLS MA390C?

The SLS 3-Axis Speaker MA390C is a 12-inch coaxial full-range speaker in a spherical molded enclosure, developed to cut the time and cost of installing Dolby Atmos overhead speakers. It ships ready to hang from a single point and can be panned, tilted and rotated to meet Dolby Atmos aiming requirements. With an optional wall-mount kit it also works for side and rear surrounds.

How does the Dolby SLS MA390C work?

A 300 W, 12-inch coaxial driver with a 1.75-inch coaxially mounted high-frequency section and a passive crossover sits inside the sphere. Coverage is 90° conical, sensitivity is 96 dB, and calculated maximum output is 121 dB continuous and 124 dB program at one metre, across 60 Hz to 20 kHz.

The speaker ships ready to install from a single point, typically all-thread, and adjusts in pan, tilt and rotation without extra brackets. Two ceiling-grid tile mounts are available. The FCT-24 flat tile bridge mounts the speaker below the grid, while the RCT-24 recessed tile bridge raises it into the ceiling to minimize projector sight-line issues. Each replaces a 2 ft x 2 ft ceiling tile, and the grid carries the load with only a simple safety cable to the structure.

For side and rear surrounds, the WMA-15 wall-mount kit is available. Drive MA390C arrays from a Dolby CP950A with a Dolby Multichannel Amplifier such as the DMA32301, using Dolby's published MA390C processor settings.

What are the key features of the Dolby SLS MA390C?

• 12-inch coaxial driver — rated at 300 W with 96 dB sensitivity for full-range overhead playback.
• Three-axis aiming — the spherical enclosure pans, tilts and rotates from a single hanging point.
• Faster ceiling installs — FCT-24 and RCT-24 kits replace a 2 ft x 2 ft ceiling tile and need only a safety cable to the structure.
• Recessed option — the RCT-24 lifts the speaker into the ceiling to reduce projector sight-line conflicts.
• Wall-mount option — the WMA-15 kit adapts the MA390C for side and rear surrounds.
• Lightweight molded enclosure — 28 lb net weight eases handling overhead.

Where is the Dolby SLS MA390C typically used?

• Dolby Atmos cinema auditorium
• Screening room
• Auditorium
• House of worship
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

Is the MA390C designed for Dolby Atmos?

Yes. Dolby developed the MA390C to reduce the time and expense of installing the overhead speakers Dolby Atmos requires, and it meets Atmos aiming needs with three-axis movement. It is driven from processors such as the CP950A or CP950.

Which mounting kit should I choose?

Use the FCT-24 to hang the speaker below a 2 ft x 2 ft ceiling grid, the RCT-24 to recess it into the ceiling, or the WMA-15 for wall-mounted side and rear surrounds. Each kit is sold in pairs.

Does it need extra rigging hardware?

It ships ready to hang from a single point, typically all-thread. With the tile kits the ceiling grid supports the speaker, with a safety cable to the building structure.

What amplifier channel does it need?

Each MA390C is an 8-ohm passive speaker rated at 300 W AES. Creation Networks sizes amplifier channels during design.

What warranty and support are available?

The MA390C carries Dolby's manufacturer warranty, confirmed with your quote. Creation Networks designs, installs and aims Dolby Atmos overhead systems; see the Dolby Professional collection and request a quote.