Your wall treatment (typically, but not necessarily wedges) will have some sort of low frequency cut off, but also the room itself will have its own characteristics (where Beranek will definitely help).
It may seem odd, but the only two I've worked on we actually proportioned as if they were reverberant rooms, to get an even spread of modes.
Are you going to be measuring the results as well?
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
In my case we wanted to how much the rate of attenuation with distance was affected by the corners, so I stuck a sound source in various appropriate places and plotted the resulting SPL field.
Another use for SACs is sound power determination, so I looked at the intensity field around the measurement location. If the SAC had been perfect then we'd see no reverberant component.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.