OP: My recommendation is to buy a calibrated microphone, a miniDSP mic goes for $100 on Amazon, and down load the free Room Eq Wizard (REW) software and measure your own room. Based on that data, you could have a more meaningful discussion about what DSP can do to improve your room/ speaker acoustics.
I’ve done the measurements and it’s a lot of fun. You can get a miniDSP equalizer for $200 and program it with the same tools you used to measure the room. It works as advertised. My room/ speaker set up has some SBIR issues but DSP cannot fix a null. In the end, I didn’t use DSP. I did some room treatment (a more general solution) and was satisfied.
I’ve done the measurements and it’s a lot of fun. You can get a miniDSP equalizer for $200 and program it with the same tools you used to measure the room. It works as advertised. My room/ speaker set up has some SBIR issues but DSP cannot fix a null. In the end, I didn’t use DSP. I did some room treatment (a more general solution) and was satisfied.