Hi, I am using the R-15pm with the R-112SW subwoofer, and I am wondering if I should use LFE when playing my records? I am so newbie when It comes to setting up the subwoofer. What should I think about? I am also using the Rega RP1 turntable and I feel the sound is to low when I am maxing it out.. When using bluetooth or digital source the sound is WAY higher. Thank you guys for helping me out here in the dark.