Equalizer in a Hi Fi system

Boils down to dedicated streamer vs computer serving code. Easier to get highest fidelity from former than latter. Probably best to stick to, in this example, hardware SPL PQ vs plug-in for home playback. I’d also be willing to bet bigger broader tonal boosts like air band better done with analog hardware than same equalizer via plug-in digitally. Miro, you seem to indicate this for playback 

On extension, I’m guessing the best fidelity post production playback digital EQ would indeed be something like @mijostyn ’s DEQX Preamp. Because it’s a dedicated audio piece optimized for highest fidelity playback. Well, I still want try DEQX, @mijostyn , or hear it in a showroom. Let me know when I can hear that. 

Just a quick update - I managed to find an output cable XLR to RCA that works perfectly. Just a cheapo from BlueJean Cables.The way it's wired is pin 1 to ground, pin 2 to signal, pin 3 floating(unconnected). Being pretty ignorant about electrical circuits and how and why they work, I did a lot of reading and also came across an illustrated chart that explained the many ways to wire and convert patch cables from one format to another.The adapters and cables I tried previously used both pin 1 and 3 for ground which is how the input side is usually wired when going from RCA to XLR and often works for the output side but not always. Apologies for my other post where I said pin1 was for signal,too late to edit.So now I can give the API unit a try and see how that goes. tlcocks gave me some interesting suggestions of other eqs to check out that are very well reviewed and would be fun to play with, but I'm sticking with simplicity for now.I just want to correct a tiny bit with some overlap for smoothing.

So for the rca to XLR input cable, 1 and 3 both ground, 2 hot. And for the output side, 1 ground 2 hot 3 floating. I wonder if the Skyline piece would’ve worked if I’d used that output pin scheme. You’ve just taught me something!  Good luck with the API unit!  Look forward to hearing more!  Which exact model is that?

This is a precise link for the diagrams.I believe the first one asked for visitors to start an account.https://www.ranecommercial.com/kb_article.php?article=2107

API select  SR24 is the one I'm trying out.Anyway I am saving that link to pass on in case it comes up again sometime. There is a forum on that site that I imagine has a wealth of information for those of us (me) to better understand how electrical circuits work.