Im woundering the same thing. I have a apx 18 that I like to try sealed. I have had it in a small ported box just for kicks no clue what it was tuned too. Say about 4 cubes. Sounded nice. I will be working up on a sealed box for it though I'll let ya know hwo it sounds.
I just got in from trying my VFL's in a prefab 3 cube and I am very impressed with the sound quality+ loudness. I have no doubt a new well braced dual chamber 5 cube enclosure will suit my needs.
