I have adjusted the SPL for each speaker but nothing more.
I couldn't get the subs SPL to match but they sound better than ever ( thanks to posts on this forum).
I have found quite a few online stations with good audio and good bass output.
I have really good bass and its not boomy at any volume. That said I'm pretty sure its my system holding up the lower frequencies.
My M80's almost cover the audible bass. They hold their own very well.
I'm sure I'm missing something.