i think they recommend that around 15% of your walls to absorption (?).. if this is the case then a broadband absorber in just the corners probably wont even get that close.... (in my room the bass traps equal about 9.5% of wall surface coverage, 18x24 room 2' traps)
more of a 2 for 1 deal as i see it... why build separate absorbers when you can have them both together....
just my 2c
gl
