My room is just 10*11. I have used polkhts12, bic pl200, xtz 10.17, 10.17 edge, 12.17, osd, rythmik LV12F and now fvx 12. In terms of spl and pressurising the room all had the power and head room and is loud enough. I have even measured them and all have similar spl and frequency response.Bass is not just about spl and digging deep. Integration, the snappy and quick response these are something the mission 450 can’t even come close to the e15 and that is why it’s costing 1/5th of the cost to the e15. Pricing wise yes sucks and no argument there