I have a 350w amp from Brian with a rumble filter that can be set to high, mid, low damping and 28, 20, 14hz. I currently have a 20-39CS powered by it. I am planning to buy another amp for a DIY sub tuned to 22hz w maybe the 12" Dayton DVC. So is it ok to set it to 20Hz and high damping? Or what are your opinions. My listening preference is 50/50 music/movies.