350W Power Subwoofer Mono Amplifiers Professional Board Amplificador Audio DIY Features: 1.The 350W subwoofer amplifier board, using the original disassembled tube, signal-to-noise ratio is very high, in the case of not plugging the audio input line can not hear any noise. 2. And with full relay protection, such as power-on delay, DC output, short circuit speakers. 3. The whole front and rear stage split design, easy to DIY installation, the front low-frequency processing ability. 4. Can be adapted with a variety of subwoofer, connected to the passive speaker can be used. Specification: Operating voltage: AC24-28V Output power: 350W Chip type: Sanken Size: as shown in the picture Weight: 468g Channel type: mono Recommendation: Recommended with a single 10-12 inch, 250W-300W subwoofer speakers Package Included: 1*Amplifier board 1*Preamp board Note: 1. Please allow 1-3 mm error due to manual measurement. Please make sure you don't mind before ordering. 2. Please allow 1-3g weight error. Please make sure you don't mind before ordering. 3. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual colour of the real item. Please make sure you don't mind before ordering, thank you!