Bummer, I was hoping you'd try a big folded TL that sims 100 dB/W/m half space from 30-70 Hz. You could use it as a platform to mount your mains/whatever. Two would get a bit unwieldy though unless stacked on top of each other against the wall.

In theory, you'll get ~112.78 dB/600 W/m/20 Hz/half space peaks with one, so summing two = ~115.79 dB in 'stereo', but ignoring room gain it will be less due to thermal power compression.

GM