I already built two boxes (squared if looked at from outside when in use) with JBL 2245H, but I have not had the picture developed yet.
I have not really played the "corner horns" yet, made some measurements in my room with RS meter and Stryke's Basszone Test CD's sine signals:
HZ DB
10 78.5
12.5 76
15 73.5
17.5 77
20 77
22 78
25 79.5
28 81
32 83.5
36 85
40 89
45 93
50 88
56 80
63 80
71 78
80 82
89 95
100 89.5
112 86
126 87
142 86
160 84
201 90
254 78
320 67
403 72
507 64
640 72
806 73
1015 67
1280 76
1612 80
2029 75
2560 54
3226 67
4064 51