my room sounds dead

My new room sounds really dead. I have to increase volume 3 times to get the same playing level that I had in my first room. There is no bass response. The walls are composed by rockwool covered by middle density wood panels. Ceiling is covered by egg crates and there is a heavy carpet (that I don't want to change) on the floor. What are the more efficient solutions to increase the bass response and get my room sounding more "living". I use electrostatic panels as speakers (strangely sounded plenty of bass in my first room --> L:4m l:3,2m h:2,5m sorry I don't know what it makes in feet). I've tried to put speakers closers to the walls but it sounds worst. I can hear all low frequencies when I stand up but when I'm sitting, it sounds poor and lifeless.
Thank you for helping me to go to the right way.