Originally Posted by Martycool007
Is it safe to not us a high pass filter on this sub? Will it actually go down to 10hz?
It's a sealed box, so the cone exersion is controlled by the air-spring effect of the enclosed volume of air. Most sealed subs, with proper enclosure design, will play down really low. It's just a question of how loud it will be at that frequency, which is a function of raw displacement. This sub, being an 18" cone with more surface area than 2 12" subs and about 20mm of useful excursion, should perform pretty well for a single driver.
You can see some simulations in post #1. Notice that the cone excursion levels off near the left side of the frequency graph.
I forgot to mention that my Ridgid portable Tablesaw (R45161) stopped working yesterday. It's probably a bad switch, but I had to bring out the circular saw, which I am not a big fan of. It will probably take me a couple weeks to get the TS fixed. I am really happy that it happened so late into my build, and not right away.
Took the clamps off this morning. I was pressing on all the sides, no creaking or popping, so that is good.
*I have some small (~1/16") gaps aka air leaks on the back panel. Wood glue wasn't quite able to fill all the gaps. I might use my trusty expanding Gorilla Glue to attempt to solve this issue. It's too tight a space to get PL in there without applying it with my fingers.
*I need to find some 12 gauge spade connectors that fit my speakon jack.
When I can rememdy those 2 issues, it will be ready for testing. I can't wait to hook it up and listen to it, but again, I can't let my enthusiasm cause me to cut corners.
I'll probably use it in an "unfinished" state for a couple months until the weather warms up. Then it will be getting a full bondo treatment, and then sprayed with a paint gun, possibly black latex or Acrylic. I'd love to get a granite top for it. Maybe I can make one out of granite tiles.