A Good DIY Day:
Imagine a Saturday morning. It is somewhat hectic because you still have to run some errands, one of which is buying wood for a sub woofer housing. So you sit down for 2 minutes to imagine what proportions might look OK for your design and what volume might be required. After a few seconds of hacking numbers into your calculator you scribble some hardly legible numbers onto a paper and rush to the DIY store to queue up at the counter of the wood shop.
Days later after everything is put together during the measurements you find that you just have built a closed box for a perfectly flat response !!!
You sometimes wonder how the speaker bug might surface one day... J
Anyway, I’m going to equalize the response to get some more bass. Target is within the 30...35Hz region to just not hit one of the first room modes at full SPL.