10 Best Class D Amplifier Board 2025 in the United States

The Kinter K3118 Class D amplifier board offers a compact and economically-priced solution for those looking to enhance their audio systems. Powered by the Texas Instruments TPA3118, this amplifier ensures efficient and clean audio output.

Its inclusion of a 12V 3A power supply adds convenience, making it ready to use straight out of the box. The lightweight aluminum enclosure with mounting tabs and its small size (4.8 x 5.7 x 1.7 inches) make it versatile for various applications, such as DIY projects, home audio setups, or arcade systems.

The 3.5 mm stereo jack and gold-plated RCA inputs provide flexibility in connecting different audio sources, enhancing its usability. The Kinter K3118 remains a solid choice for users seeking a budget-friendly and functional Class D amplifier board for various audio applications.

The DROK 12V Amplifier Board is a compact class-D amplifier module that offers a good blend of power and efficiency for DIY audio projects. With a working voltage range of 8-26V, it can be powered by common sources like 12V or 24V, making it versatile for various setups. The board delivers an output power of 15W per channel at 24V with 8-ohm speakers, which is substantial for most small to medium-sized speaker systems.

When connected to lower impedance speakers (4 ohms or 2 ohms), the power is automatically limited to 15W, which might be seen as a drawback for users seeking higher output with these types of speakers. The efficiency of over 90% and low total harmonic distortion (THD) of less than 0.2% ensure clear and powerful audio output with minimal noise. Additionally, the signal-to-noise ratio (SNR) is respectable, contributing to a clean sound quality.

The board's design incorporates high-quality materials like a black immersion gold circuit board, imported KEMET capacitors, and gold-plated terminals, which enhance its durability and sound performance. Safety features such as input reverse connection protection, short circuit protection, and overheat protection add reliability and peace of mind during use. The compact size (3.9 x 3.86 x 0.91 inches) and lightweight nature (1.45 ounces) make it easy to integrate into various audio projects without taking up much space. While it has numerous strengths, the primary limitations are the automatic power limitation with low impedance speakers and the need for external components to utilize the mute and shutdown functions. This amplifier board is well-suited for DIY enthusiasts, hobbyists, and those looking to upgrade their home audio systems with a small yet powerful amplifier.