Definitely Spatial Audio. I am using the M4 Triode Masters and have no issues with bass boom. My room is 10' by 20' with an 8' ceiling and the previous box speakers I owned really boomed on the bass notes. Spatial Audio speakers are open baffles and do need to be about 3' from the wall behind them and about 1' from the side walls to work well.
Speaker With Least Room Interaction
What speaker has the least problem with the type of room up have in regard to bass boom. In other words the least bit of room interaction. Rear bass port, front bass port, bottom bass port, sealed.