I really wanted to avoid asking this embarrassing question, but I cannot get around it. In designing a infra-sub (if you will), I am realizing that most manufacturers will not list Fs below 20Hz, and many of those list 30Hz. My "Infra-Sub" will play only 30 Hz on down, and I will use a Linkwitz transform + a DSP to increase the sensitivity of those tones to at least 0. Here is the question: Am I creating or emphasizing tones at that point? I listen to high-res pipe organ music, and my goal is to reproduce the infrasonic tones you feel when listening to one of those roaring behemoths. I don't want to "create" at all. It is bad enough that I have to bring gain to tones that might be there.