Originally Posted by pauleyc
So jumping between the UM15 and 18HO. I like the comparison earlier in this thread and definitely like the box size savings; however has anyone modeled the UM15 against the SI 15's??? I was originally going that direction before things got complicated
whatever I do there will be four of them at the 1/4 points on the front/back wall.
Got the msg.
Here is a comparison between the Ultimax 15 and the SI 15". T/S specs were from the manufacture. Box size is limited to 4cuft and power is limited to 600w each.
Pretty similar when overlaid. However, the Ultimax has a flatter, smoother natural response that likes this larger enclosure. It's almost perfect. The SI has a bit more displacement on hand and is low Q in this enclosure. One could easily squeeze it in a much smaller enclosure without bringing a bump in the response at the expense of low end sensitivity.
Seeing as how the U15 is on sale at the moment, if I were in the CONUS and had no problem using a 4cuft box for it, I'd go with that one. Free shipping.
The SI is also a very good choice if it's anything like the 18" version. It also can be pushed to a much smaller box if needed.