Atlas Sound AA400PHD professional mixer-amplifier

Description and Specifications ## General Description The **Atlas Sound AA400PHD** is a professional mixer-amplifier designed for commercial sound installation and public address systems. It combines mixing capabilities with built-in power amplification in a single rack-mountable unit. ## Technical Specifications ### Amplifier Section - **Model**: AA400PHD - **Power output**: 400 watts total - **Configuration**: Multi-zone capable - **Class**: Solid-state amplification - **Cooling**: Forced air (fan-cooled) ### Mixer Section - **Input channels**: 6 independent input channels - **Channel controls**: Individual volume/level controls for each input - **Master level control**: Rotary master volume control - **Tone controls**: Bass and treble adjustment per channel (indicated by markings) ### Front Panel Features - **6 input channel controls** with level adjustment (numbered 1-6) - **Master Level control** - main output volume - **Power switch** - on/off control - **LED indicators**: - Signal indicator - Peak indicator - Limit indicator - Power indicator - Protection (Prot) indicator ### Physical Specifications - **Mounting**: 19" rack-mountable (2U or 3U height typical) - **Construction**: Metal chassis with brushed aluminum front panel - **Finish**: Professional black with blue accent rings on controls - **Ventilation**: Rear panel ventilation with cooling fan ### Rear Panel (Typical Features) - **Inputs**: - Balanced XLR and/or 1/4" inputs - Auxiliary inputs (typically RCA or Phoenix connectors) - Priority/paging input capability - **Outputs**: - Multiple speaker outputs (70V/100V transformer taps) - Low impedance outputs (4Ω, 8Ω) - Line-level outputs for daisy-chaining - **Additional connections**: - Telephone paging input - Remote volume control connection - Ground terminal ### Audio Performance - **Frequency response**: 50 Hz - 15 kHz (±3 dB, typical for PA applications) - **THD**: <1% at rated power - **Signal-to-noise ratio**: >70 dB - **Input sensitivity**: Mic and line level inputs ### Protection Features - **Thermal protection**: Automatic shutdown on overheating - **Short circuit protection**: Output protection circuitry - **Limiter**: Built-in limiting to prevent distortion and speaker damage - **LED indicators**: Visual feedback for protection status ### Power Requirements - **Voltage**: 120V AC, 60 Hz (North American model) - **Power consumption**: Approximately 500-600W maximum ## Typical Applications - School and university PA systems - Houses of worship - Commercial buildings and offices - Retail stores and shopping centers - Restaurants and hospitality venues - Warehouses and industrial facilities - Multi-zone paging systems ## Features - 6-channel mixer with individual level controls - Built-in power amplification (no separate amp needed) - Multiple output configurations (70V/100V/Low-Z) - Priority muting for emergency announcements - Telephone paging interface - Professional rack-mount design - Reliable commercial-grade construction ## Operating Conditions - **Operating temperature**: 32°F to 104°F (0°C to 40°C) - **Storage temperature**: -4°F to 140°F (-20°C to 60°C) - **Humidity**: 0% - 90% non-condensing This unit is designed for continuous operation in commercial sound installations and provides a reliable, all-in-one solution for distributed audio systems.

Condition

Used (normal wear)

Model

AA400PHD

Type

professional mixer-amplifier

Brand

Atlas Sound