Professional Power Amplifiers, Digital Power Amplifiers, Toroidal Transformers manufacturer / supplier in China, offering Wholesale 2CH 300W Single Power Supply 50V Input 12V Output Amplifier PCB Board Module for Active Speaker Multi Channel Matrix Amplifier and Outdoor Speakers, 220V AC to 100V 110V AC Copper Winding Power Supply Toroidal Transformer, 250W Digital Amplifier Module and so on.