Your problem is your room, it is to reflective and large. You need some throw rugs or something on the floor, wall hangings, etc. to improve your reflective properties. Also, a good sub, at least the 350 or higher, or even two subs would be needed.

My room is 8100+ cubic feet, I have 3 subs and m80's, a Denon 2805 and monoblock amps driving the 80's.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85