Bass and Bass Traps

I have the latest Merlin VSM's driven by an ARS Filarmonia integrated. I love my system, and overall I find the bass to be full and tuneful. When I placed 2' x 4' x 4" bass traps in the corners behind the speakers, that made the bass more tight and tuneful, and the overall soundstage more realistic. But when I stand half way between the speaker and the bass traps, the bass is more powerful and tuneful than it is from my listening position. I suspect it's because there's a room mode (or is it node?) there. When I'm playing music with hard driving bass, I wish that I could hear from my listening position the bass that I can hear when standing in afore mentioned position.

I guess my question is, what can I do acoustically to the room, if anything, to direct some of that bass to my listening position. I've ruled out moving the speakers through trial and error. Their current position seems optimized to me for all other considerations.

Room is 12' x 19' x 7'.