Atlas Sound AM1200 – Low-Profile Sound Masking System with Built-In Speakers

Product Overview

The Atlas Sound AM1200 is a compact, low-profile sound masking system designed for small commercial office spaces requiring speech privacy and ambient noise management without a complex multi-zone installation. The unit integrates a dual 4-inch speaker array and a 12-watt Class D amplifier with both a built-in speaker output and a 70.7V distributed output for powering remote masking speakers, making it a complete self-contained masking solution for individual rooms, open-plan work areas, and private offices. With its 2.5-inch height profile, the AM1200 fits into shallow ceiling plenums and under raised flooring where standard masking systems cannot be accommodated.

Product Description

Sound masking reduces speech intelligibility in open offices and private meeting spaces by adding a shaped background noise signal — typically matching the frequency profile of human speech — to the environment, making conversations outside a defined zone unintelligible without being perceived as distracting. The AM1200 provides user-selectable pink or white noise as source material, with a variable hi-cut filter adjustable from 1kHz to 7kHz with a bypass switch, allowing the masking signal to be tuned to the specific acoustic characteristics of the installation space. The built-in horizontal speaker array consists of two 4-inch drivers covering the 200Hz to 4kHz range, which aligns with the primary frequency band for speech masking. A separate 12-watt 70.7V output at 416-ohm load drives external masking speakers in adjacent zones or larger coverage areas, with independent level controls for the internal speakers and the external amplifier output provided separately. The balanced Phoenix-type input connector allows integration with an external signal source or masking controller where a networked system is required. Power is supplied via a 24VDC external power supply. The AM1200’s cabinet measures 7.25 x 2.68 x 6 inches and weighs 3 pounds, making it suitable for concealed installation in ceiling plenums, under raised floors, or inside millwork. Two mounting supports allow suspension in higher ceiling plenums; four mounting holes allow direct surface attachment to most substrates.

Key Features

• Dual Built-In 4" Speakers — Horizontal array covers the 200Hz–4kHz speech masking frequency range from the self-contained unit.
• 12W Class D Amplifier — Powers both the built-in speakers and a 70.7V output for remote masking speakers at 416-ohm load (2 x 12W).
• Selectable Pink or White Noise Source — Choose between pink and white noise masking spectra to match the acoustic target of the installation.
• Variable Hi-Cut Filter — Adjustable from 1kHz to 7kHz with bypass switch for tuning the masking signal spectrum to the space.
• Separate Level Controls — Independent level controls for the internal speakers and the external 70.7V amplifier output.
• 70.7V Distributed Output — Powers additional remote masking speakers for multi-zone or larger-area coverage beyond the built-in array.
• Balanced Input Connector — Phoenix-type balanced input for integration with external signal sources or masking controllers.
• Low-Profile 2.5" Height — Fits in shallow ceiling plenums and under raised flooring where standard masking equipment does not fit.
• Multiple Mounting Options — Two suspension supports for plenum hanging and four surface-mount holes for attachment to floors, ceilings, or millwork interior.
• 24VDC External Power Supply — Low-voltage power input simplifies installation in locations where AC outlet access is limited.

Typical Applications

• Conference room
• Boardroom
• Government space
• Commercial meeting space
• Multi-purpose room
• Training room
• Huddle room

Technical Specifications

Frequently Asked Questions

Q: What is sound masking and how does the AM1200 provide it?

A: Sound masking adds shaped background noise — typically matching the human speech frequency range — to an environment to reduce how far intelligible speech travels. The AM1200 generates pink or white noise, filters it with an adjustable hi-cut, and distributes it through its built-in dual speaker array and/or external 70.7V speaker outputs.

Q: What is the difference between pink noise and white noise masking?

A: White noise has equal energy per frequency across the spectrum, while pink noise has equal energy per octave, making it louder in lower frequencies. Pink noise is generally perceived as more natural-sounding and is more commonly used in speech masking applications. The AM1200 allows selection of either.

Q: Can the AM1200 power additional speakers beyond the built-in array?

A: Yes. The 70.7V output drives remote masking speakers for expanded coverage. The external output has its own independent level control separate from the built-in speaker level.

Q: Will the AM1200 fit in a standard ceiling plenum?

A: The AM1200 is 2.5 inches in height, designed specifically for shallow ceiling plenums and under-floor installations where standard masking units do not fit. Two suspension supports are included for plenum hanging.

Q: Does the AM1200 include a power supply?

A: The AM1200 requires a 24VDC external power supply. Verify whether the power supply is included in your specific order or must be purchased separately.

Q: Can the AM1200 be integrated with an external masking controller?

A: Yes. The balanced Phoenix-type input connector accepts an external signal source or masking controller output for integration into more complex or networked masking systems.

Q: How is the masking signal tuned after installation?

A: The variable hi-cut filter (1kHz to 7kHz with bypass switch) allows the masking signal frequency content to be adjusted to match the acoustic characteristics of the installation space after commissioning.