Features: 1. Single-Channel Amplifier: Experience the impressive power of this mono channel hifi audio amplifier board. It delivers a robust and clear audio output, making it suitable for applications that require high power performance.2. Low Switching Noise: Designed to minimize switching noise, this new tube power amplifier ensures that it 't have a significant impact on your speakers. For added protection, we recommend using a speaker protection circuit. This circuit not only eliminates the impact noise during power on/off but also prevents speaker damage by avoiding direct current output in case of amplifier failure.3. Low Bottom Noise: With its precise design, this digital mono amplifier module requires no additional adjustments after installation. The output zero-drift voltage generally stays below 50mV and remains stable over time, ensuring minimal bottom noise and drift.4. Easy Installation: This single channel amplifier board is designed for hassle-free installation. As long as the connections are correct, there's little room for error, resulting in a high success rate even for beginners. Enjoy the convenience of a plug-and-play solution without the need for additional tuning or adjustments.5. Compact Design: The mono high power tube amp board features a compact size, making it easy to integrate into various setups. It utilizes high-quality components, including 2SC5200+2SA1943 power transistors, to reliable performance and .Specification: Operating Voltage: 10v-45vRated Output Power: 100wMaximum Output Power: 150wInput And Output Seat Spacing: 5.08mm/0.20inHole Distance Between Two Tubes: 47mm/1.83inThe Power Tubes On The Board Are: 2SC5200+2SA1943Material: PC+Metalcolour: As ShownPackage Contents: 1 x 300W Mono Power Amplifier(Due to different product batches, the appearance may be different, which does not affect use.)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.