Analog Metric Limited is specialized in developing high fidelity audio products. We are developer and supplier of any kinds of audio products with special focus on amplifiers, DAC and accessories. Our products include vacuum tubes, tube amplifiers, solid-state amplifiers, audio kits, modules, PCBs, audio-grade electronic components and the accessories. Our products are selling worldwide. We concerns consumer's benefits and satisfactory. The products we sold are ensured with high Quality-Price ratio. We have laboratory that enable product researches, development and evaluation, allowing us to audition various brands and explore the best products for our valued customers. Development of High Fidelity Audio ProductsDesign House of Electronic Circuits and Printed Circuit Boards Supplier of Shuguang, Beijing, Nanjing Vacuum Tubes