TPA3255 600W High Power Mono Class D HiFi Amplifier Board DC24-48V Digital Audio Amp Board with SNR 100dB Delay Protection

Product Overview

Upgrade your DIY audio setup with this professional TPA3255 Mono Class D Digital Amplifier Board. Adopting high-performance TPA3255 amplifier chip, this mono audio amp delivers ultra-low distortion, high signal-to-noise ratio and stable high-power output. Equipped with multiple built-in protection mechanisms including power-on delay, overheat and overcurrent protection, it ensures safe, long-term and stable operation. Perfect for home HiFi systems, passive subwoofer modification, DIY speaker projects and custom low-frequency audio playback setups.

Core Features

• High-Fidelity & Low Distortion Performance: Features a premium TPA3255 dedicated audio chip, with ultra-low 0.01% total harmonic distortion and 100dB high SNR, restoring clear, delicate and pure sound quality without noise or sound distortion.

• Multi-Impedance High Power Output: Supports multi-ohm speaker matching, providing 600W peak power for 2Ω speakers, 300W for 4Ω speakers and 150W for 8Ω speakers, perfectly compatible with 10W–400W passive speakers for strong and explosive bass performance.

• Full Protection System: Built-in power-on delay protection, overheat protection and overcurrent protection functions, effectively prevent circuit burnout, component damage and speaker failure caused by abnormal voltage, short circuit or overheating, greatly improving equipment safety and service life.

• Wide Frequency Response & Stable Operation: Standard 20Hz–20kHz full-band frequency response, covering full-range audio and low-frequency bass demands. Adopts mature Class D digital amplification technology with high working efficiency and low heat generation.

• Standard & Practical Interface Design: Comes with 2.54mm pitch 2P single-ended audio input interface, independent mute interface and 12V fan power interface, convenient for wiring, installation and function expansion, suitable for various DIY audio transformation scenarios.

Full Specifications

• Model: TPA3255 Mono Channel Amplifier Board

• Amplifier Type: Class D Digital Amplifier

• Core Chip: TPA3255

• Output Channel: Mono Channel

• Frequency Response: 20Hz – 20kHz

• Signal-to-Noise Ratio (SNR): 100dB

• Total Harmonic Distortion (THD): 0.01%

• Working Voltage: DC 24V – 48V

• Output Power: 600W (2Ω), 300W (4Ω), 150W (8Ω)

• Compatible Speakers: 10W~400W, 2Ω/4Ω/8Ω Passive Speakers

• Protection Mechanisms: Power-On Delay Protection, Overheat Protection, Overcurrent Protection

• Fan Interface Specification: 12V DC, 100mA

• Product Size: 110 × 102 × 25mm

Important Usage Instructions

• Speaker Compatibility: This amplifier board is only for passive speakers. Do NOT connect to active speakers, active subwoofers or constant-voltage speakers to avoid equipment damage.

• Power Supply Requirements: Adopt DC 24V–48V power supply (10A or higher current is recommended). Strictly prohibit reverse connection of positive and negative poles and voltage exceeding 48V, otherwise the board components will be burned out.

• Wiring Standard: Adopts single-ended audio input. Please correctly connect the positive and negative poles of the input interface, incorrect connection will cause obvious noise.

• Mute Mode: Short-circuit the mute interface to activate the amplifier mute function.

• Installation Environment: Do not use or store the board in humid and watery environments. Do not power on the board when it is directly placed on metal surfaces to prevent short circuit and failure.

Application Scenarios