erm you didnt just mention mp3 and high-quality in one sentence, did you? 😉 😀
and, well, sure its possible. use a named pipe in-between step before the data is streamed to the SB. but the “magic” that happens then has to be tricky. convolution with a simple FIR filter wont really do “magic”. and room impulse response doesnt really have a lot of effects.
If you do have a real stereo system on the other hand, the sound/surround receiver is capable of creating a “sweet spot”.
Those are ranked 1000$ and above though. just for the amp.