Sonic Defender
Headphoneus Supremus
Makes sense, but I would suspect that if one equalized the LS50W to trim back what I will assume without seeing any frequency response graphs is somewhat overcooked mid-bass, some of the overbearing bass would be reduced. I find the R300 also has a little of that, but to this point I haven't bothered using EQ as it is a minor issue. So if the LS50W is equalized that would allow some sub bass to be added, and likely it is needed. I think all in one driver designs may suffer a little from the signature being tuned to sound very full in order to compensate for the normal rolled off low and sub bass.the general consensus and believe me I have tried subs is that if you like audiophile sound a sub is really difficult to integrate with the LS50W and 99% of the time just sounds overbearing or simply awful....depends a lot on music, room acoustics etc of course so ymmd
If that is the case trimming back the bass on the speakers is a good thing, then gently blending in some sub bass via a sub or subs. Based on experience and research frequently people turn their subs up too loud and that of course muddies and causes the sound to become unbalanced. You should barely hear a sub, it should more be perceived as a overall sound pressure increase, but I suspect you know this so sorry for perhaps stating the obvious.