It is a tube buffer for those digital signal like as CD, MP3 player, and your smart phone, that adopt 2 pcs Beijing thumb tube 6J1 which is used on more famous tube preamplifier, and designed as HIFI cathode output circuit. And those component also adopt HIFI grade one.

And there is one type preamplifier, we call it as tube buffer that is no gain, input and output signals 1 to 1, Its role and advantages are, it can greatly reduce the digital taste and transistor sound when connected between VCD, CD, DVD, CD-ROM and other digital audio amplifier, so that the entire sound system has sweet natural tube taste

Tube Buffer from IWISTAO HIFI from IWISTAO HIFI AUDIO on Vimeo.