I had to master some shit for a famous drum n bass group (with MC).. I wasn't shure where to cut off the signal.. they told me, everything above 15kHz is bad.. well, I couldnt imagine that, but ok, I've made a lowpass at 15kHz and a highpass @40kHz and it worked well! the dynamics of an LP is not very good theoratically.. hum, I dont know, never did an A/B of this LP..
I dont know if it depends on the genre.. in drum and bass the bass is very loud, and maybe the needle is not build to get the bass and the highs at the same time..
but im uncertain @all..