Hey guys, I recently purchased a Monoprice, Monolith 10 inch subwoofer to replace my old Velodyne 12 inch. Going from the Velodyne to the Monolith has been disappointing because the Monolith doesn't have the mid-bass that the 12 inch Velodyne offered. What do you guys think about me running both of these subs at the same time, or should mixing and matching different subs never be done? I'm not sure what I should do, considering I have 30 days to return the Monolith. Any help would be greatly appreciated.