Sr009s' stock tonality fatigues my ears after around 30 minutes. I think its lack of lower mids and upper bass causes me to turn up the volume higher than I'd normally listen to try to "feel" the music. I can mitigate this problem if set a +4 db low shelf q 0.7 at 500 hz to give it more punch and make it similar sounding to my other cans in that region without bass boost (sounds similar to the stock Focal Utopia imo). That said I prefer listening to it with Oratory1990's harman presets. With a srm-717 it has enough headroom to make compressed music very loud even with the full -10.5 db pre-amp (for bass boost) but I do have to set the knob close to max (around 2-3 o clock) to get "adequate" volume for some high dynamic range tracks. In this case, I'll just reduce the 34 hz low shelf boost to 0 and keep the +5.5 db 105 hz low shelf so that I can change pre-amp to -5.5 db and obtain noticeable amounts of extra volume. It still sounds very good with only the partial bass boost imo. Anyway the sr-009s is hard to recommend because I really hate its stock tonality but with EQ it is a 10/10. Voted fine panther.