Nobsound NS-09E Class A Vacuum Tube Headphone Amplifier Stereo HiFi Audio Amp This is our Douk Audio Studio 2016 new masterpiece, we have years of design experiences in amplifiers field. In our company, careful modulation of every amplifier is our goal. This Nobsound NS-09E is our classic products, which has classic circuit, wonderful sound quality and solid manual work. Our NS-09E with high-end headphone and sound sources will give fans fabulous tone, higher resolution, exquisite details, and clear and happy feelings. Uses two 6N3J tubes as pre-amplification then uses 6N5P as later output to polish the sound. All these allocations are perfect design.Adopts full bridge CRCRC rectifier design, it reduces noise at minimum level. Components quality is reliable. Pure A1 grade copper wires. Exquisite workmanship and stable working are one of the most important elements for high quality amplifier.Excellent technology and art design. It has fashion and exquisite look. Can provide your own concert hall. As we know, everyone wants to have good feeling every day. Great music will bring us happiness after busy and fast work. TI provides an excellent HIFI concert system to your house and you just enjoy your own personal HIFI concert hall by wearing headphone. Package: 1PC headphone amplifier 1PC Power cord