DM-AB001 MAX97220 Stereo Headphone Amp Module | DC 3.7V-5V | Type-C Interface 3.5mm Earphone Amplifier Board

Product Features:Dedicated Audio Chip: Equipped with the MAX97220 dedicated headphone amplifier chip. The direct-drive architecture eliminates the need for DC-blocking capacitors, ensuring pure audio with low distortion.Wide Voltage & Dual Power: Supports a wide DC 3.7V-5V input. Features both Type-C and lithium battery power options, allowing simultaneous charging and playback for ultimate portability.Strong Driving Power: Delivers 125mW per channel to easily drive 32Ω headphones. Features 2x standard gain, with a potentiometer integrating power control and volume adjustment.Tri-color Status Indicator: Three LED colors clearly distinguish between working, charging, and fully charged states, making the power and operating status easy to read at a glance.Wide Compatibility: Perfectly compatible with USB sound cards, portable players, DIY portable headphone amplifiers, and small desktop audio modification devices.Product Description:This is a high-fidelity stereo headphone amplifier module designed around the MAX97220 chip. Utilizing a proprietary direct-drive architecture, the chip generates a ground-referenced output signal without requiring output DC-blocking capacitors. This effectively reduces component count and cost while delivering exceptional audio performance. It is ideal for portable audio devices, USB sound cards, DIY headphone amplifiers, and more.Product Specifications:Product Name: DM-AB001 Stereo Headphone Amplifier ModuleOperating Voltage: DC 3.7V ~ 5VOutput Power: 125mW / Channel (at 32Ω load)Gain: 2xPCB Dimensions: Approx. 60mm x 48mmAudio Input: 3.5mm Stereo JackAudio Output: 3.5mm Stereo JackPower Interface: Type-C charging / 2.54mm terminal for 3.7V Li-ion batteryInstructions for Use:Power Switch / Volume Control: The potentiometer integrates both power and volume control. Rotate right to turn on and increase volume; rotate left to decrease volume until the unit powers off.Power Supply: Connect a single 3.7V Li-ion battery to the battery terminal. When a Type-C cable is plugged in, the battery is bypassed; the module is powered by Type-C while simultaneously charging the battery.LED Indicator: Blue light = Power On / Working; Red light = Charging; Green light = Charge Complete.Precautions:Power Adapter Selection: We recommend using a 5V/1A smartphone charger or a linear power supply. Poor-quality chargers with high ripple voltage may introduce background noise (hissing).Voltage Warning: NEVER exceed 6V. Doing so may instantly burn out the chip.Connection Sequence: Before powering on, always turn the volume knob to its minimum position (fully counter-clockwise) to prevent sudden loud volumes that could damage your headphones or hearing.Cable Quality: Low-quality 3.5mm AUX cables can cause poor connections or channel imbalance. We recommend using shielded audio cables.Grounding Issues: If powered via computer USB while using a 3.5mm audio input, you may experience a ground loop (humming/buzzing noise). Switching to an independent power adapter will resolve this issue.Battery Usage: When using a 3.7V Li-ion battery, ensure the positive and negative terminals are not reversed. Disconnect the battery if the device will not be used for an extended period to prevent over-discharge damage.Package Includes:1 x Headphone Amplifier Module