Using this now to play music files through TF card slot and listen to headphones, but I plan to connect a stereo receiver in the near future and run several different tubes through them. . It has a remote control and makes it easy to adjust the volume, input, etc. The sound quality is pretty good and I like that the op amp is in the jack [I have some more expensive ones, I will try in the future] Overall a good device and cheap price.
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