Audio amplifier module XH-M145, class D, stereo, YD138-E

The compact two-channel audio amplifier module XH-M145 is designed to amplify low-level analog audio signals for passive speakers. The module uses the YD138-E integrated circuit and operates in class D. It is equipped with a rotary potentiometer for volume control, a screw terminal block for power supply and outputs to speakers, and an audio input connector on the board.

Technical specifications

• Model: XH-M145
• Device type: stereo audio amplifier module
• Amplifier operating class: D
• IC used: YD138-E
• Number of channels: 2
• Recommended power supply: 12 V DC / 1.5 A
• Working voltage range: DC 9 to 14 V
• Declared output power: 2 x 8 W at 8 ohm load
• Declared output power: 2 x 12 W at 4 ohm load
• Module dimensions: 58 x 36 x 21 mm without potentiometer protrusion
• Audio signal input: connector on the board
• Outputs and power supply: screw terminal block
• Terminal markings on the board: L-OUT, +12V, GND, R-OUT

Functions and features

• Stereo design for left and right channels.
• An integrated potentiometer allows direct volume control on the module.
• Compact printed circuit board with mounting holes for mechanical attachment.
• Equipped with electrolytic capacitors and a power amplifier circuit in one module.
• According to the attached description, the circuit includes overcurrent protection, thermal protection, and noise suppression.

Ideal for

• Built-in to smaller audio devices.
• Powered speaker projects with DC power.
• Hobby electronics and prototyping simple stereo audio systems.
• Computer or multimedia audio applications with external passive speakers.

Package contents

• 1x XH-M145 audio amplifier module
• 1x potentiometer control knob
• 1x washer
• 1x fixing nut

Why choose this product?

• Clearly designated model XH-M145 with the mentioned YD138-E amplifier circuit.
• Stereo amplifier in a compact format suitable for integration into smaller devices.
• Low DC voltage power supply for use in common DC applications.
• Direct terminal connection of power supply and speakers makes wiring easy.
• Volume control is part of the module and does not require a separate control element.

Installation and operating instructions

• Observe the polarity of the power connection on the +12V and GND terminals.
• Connect the speakers to the outputs marked for the left and right channels.
• Install the module in an area with sufficient heat dissipation.
• Feed the input audio signal through the input connector on the board.
• Disconnect power before connecting or disconnecting wires.

Safety notice

• Designed for low voltage DC power supply within the specified range.
• Incorrect polarity connection or short circuit at the output may cause damage to the module.
• Components may become hot during operation, so do not cover the module or install it on a flammable surface without suitable separation.
• Only perform assembly and connection when the power supply is disconnected.
• The product is an electronic module intended for installation, not a separately covered terminal device.