Originally Posted by markeight
Wait wait wait, for the moment i'm not interested in home theater systems or such things, stereo audio is enough for me
what i don't understand is if a dac can represent an improvement in audio quality if compared to the rca connection on a tv
I have done what you are wanting to do. I have two setups for different TV's, a full blown 5.1 setup with a new Onkyo AVR with all the modern DAC's.
I also have a TV that sends the audio OUT via RCA cable to a 10 year-old Technics audio receiver. 60 wpc. The receiver drives two speakers in 2.0 stereo only.
The 2.0 is a HUGE improvement in every way and will likely satisfy your need for better TV listening. Better highs, but still not CD quality, better lows and midrange, and of course, louder if you want it, which I usually don't. On my simple setup, the imaging is fantastic and it creates a phantom center. Even though there is no center channel, the dialog seem to come from the center of the TV. It is a very clear, pleasant sound, to me.
The DAC's from the 5.1 setup are most useful when separating the sound. For instance my wife and I like listening to Dancing with the Stars which is broadcast in 5.1, but my TV receives it in 2.0. There is male and female dialog, and GREAT music. The NEO 6 DAC will separate the sounds, sending voice to the center, most of the music to the L/R, and there is a good lower SUB sound. The surrounds play the sounds of the audience clapping. Voices sound fantastic, very clear, but voices are coming almost exclusively out of the center speaker.
The bottom line, is the DAC's really don't IMPROVE the sound, they just make it different. And frankly, sometimes the DAC's are not as live sounding as 2.0 stereo because of the additional processing.
All this is just my opinion, on my equipment. A better setup might yield different results.