On December 17, 2017 at 13:52, Neurorad said...
Keep it simple. I would use the existing joist cavity, and just block it in, if you have attic access.
And, I wouldn't even try to come close to KEF's provided 'optimal' back box volume. Whatever is good, for background music.
This does not make sense. You are trying to extend the low frequency bass response. You're going to the trouble of building a box and sealing it. But you are going to ignore the manufacturer specs and just build a random box? The volume of the box has everything to do with getting the resonant frequency lower than in free air. Why not use the specs and use the right cavity, to get the most out of your efforts?
