Yes get another and stay away from bottom firing subs, unless they have a butt plate or a fixed slot that doesn't use the floor. You CANNOT decouple that type of sub.. I quit using them in the 80s.
SVS or JL or GR OB servo subs. Sell the REL and buy a pair to start with. IBs ported or passive radiators just NOT firing downward with an open bottom.. Kid stuff OP, pure kid stuff.. I been building bass enclosures for 45 years.. No one around me uses them they are the blight of the neighborhood. Makes everything vibrate.. Even the kids are decoupling their subs and mass loading the tops with springs too..
I am not a robot
Regards