AMPCLASSD360W Class D 360W Audio Amplifier Module Unit

Module Feature

AMPCLASSD360W is a compact Class D switching audio power amplifier module with 360W RMS power rating. It adopts high-frequency PWM switching topology with high energy efficiency and low heat generation. Supports balanced XLR or unbalanced RCA audio signal input, optional 100V constant voltage output for public address system or low impedance 4Ω /8Ω speaker drive. Built-in soft start, DC detection, short-circuit, overload and overtemperature protection. It can work with emergency mute dry contact for fire evacuation voice broadcast linkage. Compact PCB assembly, suitable for built-in installation inside active speaker cabinet and sound rack. Widely stocked as maintenance spare for factory, commercial building and petrochemical public address and emergency voice alarm cabinet.

Working principle

Audio analog input signal enters PWM modulator, converted into high frequency pulse width modulation signal. Gate drive circuit controls power MOSFET to generate high speed switching output, then LC filter restores amplified analog audio waveform to speaker. Protection circuit continuously monitors output current, DC offset and heatsink temperature, and cuts off output quickly when fault occurs to avoid speaker burnout.

Onboard components

PWM modulation IC, power MOSFET stage, SMPS switching power supply, LC low-pass filter, input balance transformer, gain adjustment circuit, fault detection unit, status LED indicators and coated PCB.

LED indicators

Power LED: steady green for normal power supply Signal LED: flicker according to audio level Fault LED: red light for short, overload or overtemperature alarm

Hardware self‑diagnosis

Built-in supervision detects output short circuit, speaker overload, DC offset, over-temperature and power supply anomaly. Configuration and commissioning rely on audio signal generator and sound level meter.

Programming softwareNot applicable, analog hardware amplifier without digital parameter software.

Electrical & Process Parameters

Model:AMPCLASSD360W Brand:OEM Device type:Class D 360W audio power amplifier module Function:Audio power amplification for PA speaker, emergency voice evacuation and active loudspeaker

Mechanical & Structure

Mounting:Fixed installation inside speaker cabinet or audio rack Protection class:IP00 internal amplifier board Housing:Coated PCB with aluminum heat sink

Environmental

Operating temperature:0℃ ~ +50℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE Status:Original audio amplifier maintenance spare

Installation

Cut off AC power before replacement. Match speaker impedance and voltage mode (100V line or low-Z), confirm mute control wiring for fire linkage, set suitable gain, test audio output and fault protection function after commissioning.

Interface

AC power input terminal, audio signal input terminal, speaker output terminal, dry contact mute / emergency priority terminal.

Diagnostic

No sound: No audio input, power missing, blown fuse. Distorted sound: Overload, gain set too high, clipping. Fault alarm: Speaker cable short circuit, heatsink overheat. Low volume: Input signal insufficient, gain adjustment error.

Product Brief

AMPCLASSD360W amplifier module, Class D 360W digital audio power spare for public address and emergency voice alarm system cabinet replacement.