Atlas Sound AA30PHD – 3-Input 30W Mixer Amplifier with Auto System Test

Product Overview

The Atlas Sound AA30PHD is a 3-input, 30-watt mixer amplifier with an integrated Push Here Diagnostic (PHD) automated system test function, providing installers with a built-in verification tool for speaker line integrity without additional test equipment. Designed for 70V/100V distributed speaker systems as well as 4-ohm direct loads, the AA30PHD suits commercial paging, background music, and life-safety notification applications in conference rooms, training rooms, houses of worship, and similar commercial spaces. Long-tail applications include Atlas PHD mixer amplifier for 70V paging systems, 30-watt commercial mixer amp with automatic fault detection, and AA30PHD amplifier for boardroom distributed audio.

Product Description

The AA30PHD delivers 30 watts RMS into 25V, 70.7V, and 4-ohm loads, covering both distributed constant-voltage speaker systems and direct-impedance applications from a single device. Input 1 is a balanced mic/line/telephone input with phantom power, variable mute sensitivity control, and DIP switch-selectable mute receive, making it suitable as a primary paging input that can silence background music when activated. Inputs 2 and 3 are unbalanced summing line-level inputs with rear-mounted DIP switch mute receive capability for ducking background music from an external contact closure source. Contact closure mute terminals provide integration with paging systems, intercom controllers, or emergency notification equipment. The PHD automated diagnostic system test function measures speaker line impedance and reports fault conditions with a simple button press, reducing commissioning and service time significantly for installations with multiple speaker runs. The unit is CETL certified and operates from 110–120VAC. A rack mount kit (AARMK2-5, sold separately) accommodates one or two AA30PHD units in a standard equipment rack. This amplifier ships with an 11-pound shipping weight and a 36-month warranty.

Key Features

• 30W Output Power — Rated 30W RMS at 25V, 70.7V, and 4Ω loads; 0.5% THD from 50Hz–15kHz.
• Push Here Diagnostic (PHD) — Automated system test measures speaker line impedance with a single button press to verify circuit integrity during commissioning and service.
• Balanced Mic/Line/Tel Input (Input 1) — Accepts mic, balanced line, and telephone sources with phantom power and variable mute sensitivity.
• Two Unbalanced Summing Line Inputs — Inputs 2 and 3 accept consumer or professional line-level sources for background music or secondary paging feeds.
• Contact Closure Mute Terminals — External contact closure silences amplifier outputs for integration with paging, intercom, and emergency systems.
• DIP Switch Mute Receive — Rear-panel DIP switches individually configure mute receive behavior for Inputs 2 and 3.
• 70V/100V and 4Ω Operation — Single amplifier covers both distributed and direct-impedance speaker configurations.
• CETL Certified — Meets Canadian safety certification requirements for commercial installations.

Typical Applications

• Conference room
• Boardroom
• Training room
• House of worship
• Commercial meeting space
• Multi-purpose room
• Government space

Technical Specifications

Frequently Asked Questions

Q: What is the Push Here Diagnostic (PHD) function?

A: The PHD function is an automated diagnostic that measures the impedance of the connected speaker lines when activated by pressing the diagnostic button. It detects opens, shorts, and significant impedance deviations that indicate wiring faults or failed speakers, providing a pass/fail result without requiring a separate impedance meter or test set. This significantly reduces commissioning and service call time on distributed speaker systems.

Q: Does the AA30PHD support both 70V and 4-ohm speaker systems?

A: Yes. The AA30PHD delivers 30 watts into 25V, 70.7V, and 4-ohm loads, making it compatible with both constant-voltage distributed systems and direct-impedance low-impedance speaker configurations from the same amplifier chassis.

Q: What type of input does Input 1 accept?

A: Input 1 is a balanced mic/line/telephone input with phantom power for condenser microphones, a variable mute sensitivity control, and DIP switch-selectable mute receive for external muting via contact closure or a paging controller.

Q: How does the contact closure mute work?

A: The AA30PHD includes dedicated contact closure mute terminals. When a dry contact closure is applied, the amplifier output is muted. This allows integration with paging systems, telephone hybrid interfaces, emergency alert systems, and intercom controllers that output a contact closure to silence background audio.

Q: Does the AA30PHD require a rack mount kit?

A: The AA30PHD is a tabletop/surface-mount unit. For rack installation, the AARMK2-5 rack mount kit (sold separately) accommodates one or two AA Series amplifiers in a standard equipment rack. The mount is sold separately.

Q: What is the frequency response of the AA30PHD?

A: The AA30PHD is rated from 50Hz to 15kHz, which covers the range required for speech intelligibility and voice-quality music reproduction in distributed paging and background music applications.

Q: Can Inputs 2 and 3 be muted independently?

A: Yes. The rear-panel DIP switch allows mute receive to be independently enabled or disabled for Inputs 2 and 3, giving the installer control over which inputs duck when a mute signal is received.