Posted elsewhere, but I promised to post my build on here, if only to help others learn from my mistakes.
It should be noted that prior to these subs, I have never built or designed a speaker of any sort, never owned nor used a router and so I am figuring it out as I go along. On that basis, if I can do it anybody can, to which end, I offer three pieces of advice:
1. If your local DIY store offers a wood cutting service, use it. Getting panels cut millimetre perfect and SQUARE takes a serious amount of grief out of the process.
2. When it comes to routing/drilling/fitting panels, measure, adjust, measure, adjust and if that’s what it takes, measure and adjust again. It’s a lot less grief to get it exactly right in the first place than it is to sand, or worse, fill in mistakes afterwards.
3. Do a bit at a time. If you’re doing the build in spare evenings, don’t continue beyond the point where you are tired and actively forcing yourself to think, because in the morning you’ll find you thought wrong!
I had originally planned a pair of 75L boxes, but decided to go for a 65L box (as stuffing would allow it to behave like anything up to a 90L box) and also a 115L box and then compare the two in terms of listening preference. I would then build a second box of whichever version I preferred. Power comes from a Behringer EP4000 (2×1400 Watts(ish) which should be more than ample for my fairly typical 16x13x8ft UK room.
If you have the patience for the full original thread, then it’s in AV Forums in the UK here : http://www.avforums.com/forums/diy-subwoofer-build/1087529-dual-ae-av15-x-sealed-subwoofers-diy-build.html
So, here’s the progress so far…..