System for rock

I currently own Hurricane amplifiers, a mini max preamp, large Schweikert speakers 96db at 4 ohms 2 large woofers dip to 3 ohms, room is 26X16 can get disired bass by moving a few feet in either direction.Would a 300B push pull amplifer be an upgrade as far as fullness and bass output.
I have one word for you- NAIM.
And I have two words:

Bass Traps

If you have LF energy "in the room" but not at your listening position, then you need to modify your position and manage the bass modes/nodes with trapping if possible.