Originally Posted by j1gold16
I played around with WinISD this morning and came up with two possible designs. I threw horns and transmission lines out as possibilities as I have no experience with those. Each woofer will have its own enclosure so I can place them in different spot in the room. The sealed enclosure I came up with is 4.2 ft^3. The ported enclosure nets to 7.5 ft^3. I would us a 4" Precision Port from parts express. Not sure on the length of those. The middle section is 12" in length but I read somewhere that with the ends it's 17" in length. Regardless, it give me a tuning frequency below 20 Hz. The only issue I see is, with 1,000 watts, port velocity would be 53 m/s. I've read that this should be below 20 m/s. I could use a slot port but I'm not sure if I would flare the ends as I want to add wood veneer to the box and stain it. I'm leaning toward the ported design as it is 10 decibels louder at 15 hz. That would be awesome for movies. How do you think it would sound with music? Help!!!
Hey J1!! cool subs, I agree with you about the coolness factor for a 15... Now, I went a little too fast through your post but you didn't list any room dimensions right? Other people are right in mentioning the listening space and the various room peaks you may encounter depending on your seating location... If you have that room size let us know, maybe 1 sub will do! I would go ported with a slot port (just more port area to play with..)
Cubdenno is right about PWK, nothing wrong in having someone factor in all your variables in his own software to have a more precise model. Now, I'm more of a DIY guy and have always made my enclosures, started when I was 12 and probably have made way more ported than sealed... Sealed is just not my way of thinking, you are just wasting the back side of the cone!! not efficient... Better sounding? Not all the time. Less space? depends on the sub..
What kind of music do you listen to? a 15Hz response is just asking for room rattles instead of music reproduction (not that that is cool or not)... If you listen to Pipe organ music then maybe go down to 20... I know I love it when the lady at church hit's the low notes on the pipes even on church music
... The wife can't hear it, everybody else seems like, "What? that's just the organ right?" (think that the pipes are there for decoration...)