from what I've seen posted on their forum, 8-10 cubes seems to be recommendedbigger is not better for BTLs that 18" was in like a 10cube box and we are going down to like 5-6cubes and higher tuning.
But I dunno one time I saw scott talking about how well they perform in 4 cubes net and then I saw him saying they like 8 cubes(both 18s). SO.....I dunno //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif