A "boundary effect" is when a speaker near a wall has reinforced bass because of it's positioning.
A speaker that's a bit "thin" in bass can benefit from that placement, but many speakers will sound "bloated"...emphasizing, for instance, that chesty, male radio DJ sound.

Everyone wants to sound like James Earl Jones!

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::