I listened to the Def Tech super cubes and was not impressed. I liked the higher end Klipsch's better. I thought the sound range was way better
I own the Super Cube Reference by Definitive Tech running in line with my mains,this sub is very precise and musical if set up properly,like any piece of equipment. Me thinks your sound range that you speak of leans more towards a boom boom type of response. If so ,you will never appreciate any type of musical sub.
Go with the Boom Boom. Happy Listening...