Sure Electronics AA-AB31431 | Amplifier Module

The Sure Electronics AA-AB31431 is a formidable Class D audio amplifier board designed to deliver exceptional single-channel power with remarkable efficiency. As a booster module, it provides a robust foundation for custom audio projects, from high-fidelity home theatre systems to professional sound reinforcement setups where space and thermal management are critical.

This amplifier board excels in applications requiring substantial power delivery to a single 4-ohm speaker, making it ideal for powering subwoofers or dedicated mid-range drivers in active speaker systems. Its compact form factor and high efficiency of 89% allow for integration into enclosures where ventilation is limited, while the 750-watt nominal output ensures clean, dynamic headroom for demanding audio material.

At the heart of the board lies the Infineon Technologies IRS2092 controller, a proven topology that combines high performance with reliability. The amplifier achieves a signal-to-noise ratio of 89 dB and maintains total harmonic distortion at just 0.021% THD at 1 watt, ensuring accurate sound reproduction. Input is via RCA connectors with a sensitivity of 1.78 volts, while output connections use secure screw terminals. The board features current limiting at 11.3 amps and a gain of 31 dB, with a minimum load impedance of 4 ohms. Power is supplied through screw terminals, and the amplifier operates with a 4-ohm load to deliver its full rated output.

This board represents a cost-effective solution for audiophiles and DIY enthusiasts seeking high-power, efficient amplification in a compact package.