I am sure this has been asked a million times, but I couldn't find a definitive answer, so I am looking for input.\n\nI recently purchased a HSU VTF-15H MK2. Previously I was running dual Energy 10" (S10.3) subs. I have my HSU tuned to the 16 Hz mode (at least I believe I do). The Energy subs are rated for 21Hz, but most people place it closer to around 26Hz before a substantial dip. If I continue to run dual subs with my HSU and one of these Energy subs, will I be hindering my low bass performance (14-26Hz levels)? \n\nBasically, I'm asking if I should just run solo with my HSU, or run dual with one of my Energy subs. I am currently running dual because I thought it would help bolster the mid bass, but I feel like I can't really feel the low bass resonating as much as I hoped, or expected.