Atlas Sound MA40G – 3-Input 40-Watt Mixer Amplifier with Global Power Supply

Product Overview

The Atlas Sound MA40G is a compact 40-watt mixer amplifier in a 1RU half-rack form factor, engineered for distributed business paging, background music (BGM), and speech privacy systems. Supporting 70.7V/100V line output, the MA40G provides three inputs including a balanced mic/line input with phantom power, two unbalanced summing line level inputs, and a global 100VAC–240VAC power supply for worldwide deployment. Its design addresses the core requirements of commercial integrators: reliable audio performance, flexible signal routing, and secure control in a space-efficient chassis.

Product Description

The MA40G is part of AtlasIED's MA series — a line designed from the ground up to meet professional installation requirements. The balanced mic/line/telephone input (Input 1) features phantom power for condenser microphones and a variable VOX mute sensitivity control, enabling automatic muting of background music when a microphone signal is detected — a standard requirement in paging and announcement systems. Inputs 2 and 3 are unbalanced summing line level inputs suitable for music sources, streaming players, or other line-level devices. Contact closure mute terminals allow external automation systems, door intercoms, or emergency notification equipment to trigger muting. Removable level controls with a security cover allow final gain settings to be locked in place, preventing accidental or unauthorized adjustments after commissioning. The global power supply (100VAC–240VAC, 50/60Hz) eliminates power supply swaps for international installations. At 8.5" wide and 1.8" tall, the MA40G fits in a half-rack space or can be surface-mounted. Total harmonic distortion is rated at 0.5% or less across the 50 Hz–20 kHz response range. Power consumption is 71 watts. Dimensions are 1.8" H x 8.5" W x 7.8" D, weight 2.90 lbs.

Key Features

• 40W 70.7V/100V Output — Powers distributed speaker systems in small to medium commercial zones.
• Balanced Mic/Line/Tel Input with Phantom Power — Input 1 supports dynamic and condenser microphones for paging and announcement use.
• Variable VOX Mute Sensitivity — Automatic music muting when mic signal is detected on Input 1; adjustable threshold for varying environments.
• Contact Closure Mute Terminals — External trigger for integration with automation systems, intercoms, or emergency notification equipment.
• Global Power Supply — 100VAC–240VAC, 50/60Hz operation; no voltage switching required for international deployments.
• Removable Security Level Controls — Gain controls lock in place post-commissioning; security cover prevents tampering.
• 1RU Half-Rack Footprint — Space-efficient chassis fits in half-rack enclosures or mounts surface-to-surface.
• 0.5% THD — Clean audio output across 50 Hz–20 kHz frequency response.

Typical Applications

• Small to medium conference rooms and huddle rooms requiring background music and paging
• Retail and restaurant BGM/paging systems
• Corporate office and commercial meeting space distributed audio
• Speech privacy systems in open-plan offices and healthcare waiting areas
• Training rooms requiring mic-triggered paging with automatic music ducking
• Government and institutional space PA with contact closure integration

Technical Specifications

Frequently Asked Questions

Q: Can the MA40G be used for a 70V distributed speaker system?

A: Yes. The MA40G outputs 40 watts into a 70.7V/100V line, making it directly compatible with 70V distributed ceiling speaker systems.

Q: Does Input 1 support condenser microphones?

A: Yes. Input 1 includes phantom power for condenser microphone operation, in addition to supporting dynamic mic and line-level sources.

Q: How does the VOX mute feature work?

A: When a signal is detected on Input 1 (mic), the VOX circuit automatically mutes background music on other inputs. Sensitivity threshold is variable to suit the ambient noise level of the installation space.

Q: Does this amplifier work on international power?

A: Yes. The MA40G includes a global power supply operating from 100VAC to 240VAC at 50 or 60Hz, requiring no manual voltage switching.

Q: Can an external system trigger muting on the MA40G?

A: Yes. Contact closure mute terminals allow automation systems, door intercoms, and emergency notification devices to trigger an audio mute.

Q: What is the warranty on the MA40G?

A: AtlasIED provides a standard limited warranty on the MA series. Contact your AtlasIED distributor or Creation Networks for current warranty terms.