Many ported floorstanders these days include foam plugs for the ports for tuning the bass to the room. You might see if you can get some foam that will fit in your port(s) and see if that helps. Sometimes I place a rolled up terry washcloth (dry, of course) or hand towel in the port tube to attenuate the port output and increase bass damping.
PSB and Monitor Audio are two makers who include the foam plugs and have both front- and rear-firing ports. With two plugs and two ports you have four possible configurations.
If you still have the boxes your speakers came in, wad up newspaper and stuff it into the two speaker boxes and place them in the corners behind the speakers. If it improves bass clarity, then you know real bass traps will help. Or you could just wrap the cardboard boxes in neutral cloth and use those instead.
PSB and Monitor Audio are two makers who include the foam plugs and have both front- and rear-firing ports. With two plugs and two ports you have four possible configurations.
If you still have the boxes your speakers came in, wad up newspaper and stuff it into the two speaker boxes and place them in the corners behind the speakers. If it improves bass clarity, then you know real bass traps will help. Or you could just wrap the cardboard boxes in neutral cloth and use those instead.