The M573 is a high-power 2.1 channel audio amplifier board that utilizes TPA3116D2 chips to deliver a dedicated stereo output plus a powerful subwoofer channel. This module integrates an NE5532 preamplifier stage, allowing for precise control over the crossover and bass frequencies, making it a perfect heart for DIY home theatre systems or high-fidelity 2.1 speaker setups.

Specifications

• Amplifier Chips: TPA3116D2 (or equivalent CS3835E0)
• Preamplifier IC: NE5532
• Operating Voltage: DC 12V to 26V (24V recommended)
• Output Power: 80W x 2 (Stereo) + 100W (Subwoofer)
• Output Impedance: 4 ohm to 8 ohm
• Frequency Response: 14 Hz to 100 kHz
• Signal to Noise Ratio: 100dB
• Switching Frequency: 1.2 MHz

Features

• Equivalent IC Support: Some versions of this module may feature the CS3835E0 chip, which is a functional equivalent to the TPA3116D2, offering comparable performance and reliability.
• Dedicated Bass Management: Features a specialized low-pass filter circuit with an adjustable frequency knob to tune the subwoofer's punch and crossover point.
• Triple Control Interface: Equipped with three onboard potentiometers for independent adjustment of Left/Right volume, Subwoofer volume, and Master volume.
• High-Efficiency Thermal Design: Large dual aluminium heatsinks are mounted directly to the TPA3116D2 chips to ensure stable performance during sustained high-power output.
• Low Noise Preamplification: The NE5532 op-amp provides a high-quality input stage with low distortion and low noise floor, ensuring signal clarity before amplification.
• Robust Protection: Includes built-in protection against overvoltage, undervoltage, overheating, DC detection, and short circuits.
• High-Quality Filter Caps: Uses large-capacity electrolytic capacitors to stabilize the voltage supply and provide the instantaneous current required for deep bass transients.

Power Supply Recommendation

To achieve the full rated output power of 260W total, a high-current power source is necessary:

• Voltage: A 24V DC power supply is highly recommended.
• Current: Ensure the power supply can provide at least 10A to 15A to avoid clipping or shutdown during heavy bass peaks.

Common Applications

• Building a high-power 2.1 DIY home audio system.
• Powering a desktop 2.1 speaker setup with a dedicated passive subwoofer.
• Upgrading existing speaker cabinets into a powered 2.1 multimedia system.
• Custom automotive audio installations requiring separate sub-control.