Lindisfarne comments may be accurate about the old Merlin's, I am not sure. But I can tell you he is "wrong" about the current Merlins. I have the TSM-MX's, in a small 10 by 12'ish room, and they are anything but sterile. Drop Bobby a line, he is very approachable and will let you know about your situation. Just be aware that they are very revealing and will show any weaknesses in a system.
Regards,
Regards,