I have a Chinese tubed DAC I've had for years now. Lite Audio DAC-60. I doubt it's up to what you might expect from a newer pedigree. Actually since I've integrated an audio processor I've been using for vinyl for years and now with my cd player and DAC-60. Has made the greatest improvement with cd listening. The Aphex aural exciter. Used more in commercial applications, broadcast, sound reinforcement and recording.

Most people on audio forums I've praised it's use have considered it to be sacrilege used in home audio reproduction. I guess I'm a heretic. But I find it enhances in a good way the aspect of the home audio experience in a more vivid presentation of recorded music. Which I feel is an approximation obviously to live music and what limits of the recorded mediums capabilities are. Anyway, that's my bag. And I like it.