I have a MA Audio SY7011DX thats 1800 rms at 1 ohm powering a 4000 watt dual 2 ohm 12 Cerwin vega stroker in a ported box tuned to 36hz. And i notice, when it comes to the low notes. it like it filters it out, or dosent play it well. but on the high bass notes. its loud! i have the Sub sonic filter set to the lowest which is 20hz, would i need to purchase a PHOENIX GOLD TANTRUM BASS ENHANCEMENT CUBE or what, please help