Im looking for some opinions on a subwoofer setup I am about to build to fit in a custom Entertainment Center that is nearing completion. Here's the deal:
I initially did the equipment purchasing and box design a year ago and based on my research in the forums and some info from LTD02, I decided to build a ported subwoofer box with a single UM18-22. I did the modeling in WinISD and thought I was settled on the design. The plan was/is to tune it to 19Hz, and run a filter from 10-80Hz, with two additional sealed subs housing one PA460 each filtered at 80-200Hz.
Fast forward a year and now that I have built the Entertainment Center and am ready to build the boxes (yes it took me an entire year, lol) I went back into WinISD to look at the files and starting playing around. Now I wonder if I would be better to go with two UM18-22s in a sealed configuration. The transition seems to be smoother to the PA460s in the graph although I lose a little bit around the port tune. Although at the maximum SPLs its modeling I don't know that it would matter.
I have attached some screenshots. The large wood veneered area in the bottom center will be the UM18 box. The two PA460 subs will be on the ends facing sideways. You'll notice the box is bigger in the sealed models because of not having a port. I have modeled the signal power at 75% of the woofers RMS rating.
Should I continue down the ported road and gain a little more low end at the port frequency, and deal with what I assume will be more possible tweaking/tuning with the mixture of ported and sealed, or should I add another UM18 and keep everything simple and sealed? I have already purchased a Crown XLS2502 (775Wx2
s) that I can use to power the one ported UM18, the two sealed UM18s, or the PA460's. I still have to buy an additional amp. Also, any thoughts on the crossover points?