4 months ago i bought some montior audio Br5's love the sound now and then it sounds a bit boomy,(example 2minutes into rush of blood to the head coldplay),anyway there are 5-65nch's fr60 the wall and i have a pack of bungs for each speakers, my speakers have a port at the front 2/3rds down and a port on the back near the top. Do i need to put any in?