The LMA401 400W linkable single-channel zone amplifier is a high-output commercial power amplifier engineered for demanding distributed audio systems that require exceptional power, flexible deployment, and seamless system expansion. Delivering 400 watts of clean, reliable output, the LMA401 operates as either a standalone zone amplifier or an expansion amplifier for AtlasIED DMA Series mixer amplifiers, making it ideal for hospitality venues, educational facilities, retail spaces, corporate campuses, houses of worship, and other professional commercial audio installations.
Designed to accommodate a wide variety of loudspeaker systems, the LMA401 supports 2Ω, 4Ω, 8Ω, 25V, 70.7V, and 100V configurations for both low-impedance and constant-voltage applications. Its advanced switch-mode, auto-sensing universal power supply delivers consistent performance across fluctuating AC power conditions, while the robust output stage provides stable voltage and current for dependable operation with complex loudspeaker loads. When connected to a compatible AtlasIED DMA Series mixer amplifier via the proprietary Link Bus, the LMA401 functions as a fully integrated, gain-matched expansion amplifier that can be installed up to 100 meters (328 ft) from the primary mixer amplifier, providing greater installation flexibility.
Purpose-built for efficient installation and long-term reliability, the LMA401 includes balanced line-level inputs, electronically summed RCA inputs, rear-panel detented gain controls, remote level controller compatibility, and GPI inputs for standby and priority mute operation. AtlasIED's exclusive Push Here Diagnostic (PHD) speaker diagnostic system quickly verifies loudspeaker wiring, impedance, and transformer tap settings with a single button press, reducing commissioning time and ensuring proper system operation before handoff. Housed in a compact 1RU half-rack chassis with an included rack-mount kit and fanless convection cooling, the LMA401 delivers powerful, scalable amplification for professional commercial audio environments.
| Output Power | 400W @ 4Ω, 8Ω, 70.7V, 100V, 200W @ 25V, 200W @ 2Ω |
|---|---|
| Frequency Response | 20 Hz-20 kHz (+0/-1.5 dB) in 2-, 4-, 8-Ohm, 25V Modes; 50 Hz-20 KHz (+0/-1.5 dB) in 70.7V, 100V Modes |
| Power Consumption | 0.4W Standby Mode, 9.7W Active Idle Mode, 417.2W Full Load - 70V |
| Voltage Compatibility | Universal |
| Amplifier Topology | Class D |
| Power | @ 4Ω, 8Ω, 70.7V, 100V: 400W @ 25V: 200W @ 2Ω: 200W |
| Input Type | 1 Balanced Line, 1 RCA (L & R are summed); Connectors are in parallel |
| Input Connector Type | 3.5 mm Euroblock, 3-Position RCA (summed to mono) |
| Input Impedance | 20 kΩ (Balanced), 10 kΩ (unbalanced) |
| Input Sensitivity | 775 mV Balanced, 316 mV RCA Adjustable |
| Mount | Rack Mount Hardware Included |
| Dimensions (H x W x D) | 1.75" (44.5 mm) x 8.5" (215.9 mm) x 11.23" (285 mm) |
| Weight | 4.85 lbs (2.2 kg) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
