YAQIN CD3 6N8P/6SN7 Stereo Tube Audio Upgrade Tube Buffer Processor The power transformers manufactured with silicon steel sheet and high-quality oxygen-free enamelled copper wire Utilizes the audiophile capacitors and high quality metal precision resistors dedicated for audio frequency Beautiful aluminum chassis and panel with logo window and steel heavy duty chassis. This processor employs cathode followers to improve your audio system. It outputs the same voltage as it receives. The voltage gain approaches. It also adds tube audio quality to digital audio, reduces work load of a receiver (or an amplifier), and makes speakers sound warmer and more finer. This processor can be connected in various configurations. It is to be installed between an audio source and a receiver (or an amplifer). The audio sources can be a solid state CD/DVD player, MP3 player, iPod, electric guitar, or computer audio output.