BEFORE WE GET INTO THE BIG DEBATE:

I have t-nuts and #10 security screws that do not fit into the mounting flange holes on the sub!!!!

OK, debate on.

I know, I know... "why tune below 25-27Hz in car?!" Music rarely has information below 30Hz... why tune below 33Hz!!! Car's cabin gain can be as much as 12dB/oct from 60Hz on down.... yadda yadda.

For those of you that will NOT be able to just deal with it, please PLEASE just pretend it is 22 cubes SEALED for an IB sub! PLEASE! ( I know you won't but at least I asked) Since you know so much, then you know that all vented cabinets act as a sealed enclosure above the range where the port helps. So me tuning at 15Hz, IF the port is never used cuz my music doesn't go that low, I would be more than happy with this sub in a sealed cabinet of it's size, especially after cabin gain. (not really, but I'm tired of this argument)

I have done this before. The 4th order bandpass design you see in my avatar (some of your forums require too much effort to add a custom avatar, I will include a pic) is with an F3 of 20Hz and an S factor of .7 I designed it from Shavono.com before I learned how to use Bass Box Pro 6 and WinISD Pro. My POS Lanzar amp bottomed the sub before I got to even seal the lid... it's advertised shut off mute did not work after testing.... so the former smashed on the top plate and the coil unwound. I had to cut it open and it became a vented cabinet of 5.1 cubic feet tuned to 19Hz. I had an S15L7 in 3.5 cubes @ 27Hz. I have been there, i have done that, I have heard good setups tuned to 33Hz and 27Hz, deal with it!

ive got a box for a 15 tuned to 22hz and a box for 4 8's tuned at 30. and im like you, i think they are great. music doesnt go that low alot, but when it does it feels great. i have a big collection of chopped and screwed songs that i love to play. Im also thinking of gettin a music editor to slow down lots of songs.

mofo, avalanche, type r...did all of em go in that box? which one did best? great "mistake" of a build!

ive got a box for a 15 tuned to 22hz and a box for 4 8's tuned at 30. and im like you, i think they are great. music doesnt go that low alot, but when it does it feels great. i have a big collection of chopped and screwed songs that i love to play. Im also thinking of gettin a music editor to slow down lots of songs.

someone I could kick it with. I will have enough 30Hz on up that I need, when it does dip down that low, THAT is what I like. They can like them 30's-40's all they want

I'll be making a new thread "your chit's not low enough for me" soon hoping members will send me song names with sub-30Hz info and I'll make vids and post them on it

mofo, avalanche, type r...did all of em go in that box? which one did best? great "mistake" of a build!

the avalanche was in bandpass. since bandpass can turn out real bad real easy from a tiny mistake, I didn't seal up 1 side to test it first before caulking the sub in. My Lanzar OPTI2000D was advertised not to have shut off/turn on pop. Well, they do, and after 2 years of fighting via the BBB and New York Attorney General, Lanzar no longer advertises "soft turn on/off".

So After the ava's were done, I went ported and had the MOFO and the Type-R in it. I am very disappointed in type r's, the 2" coil couldn't take much power for long, and believe it or not... the SPL beast MOFO was beautiful!

4" coil, thick stiff foam surround, huge magnets (BIG BL) multiple stiff spyders.... and it was wonderful!

did a few layers of spraypaint today, will put some stuff from a can on for the final coat(s) got a red top under the hood, had to get a top post clamp because the car terminal ring plus the power wire ring were too thick and kept stripping out.

This was a few weeks ago with 18.5 cubes @ 17Hz. We just happened to get where we actually wanted to be with our "temporary" sloppy box. 22 cubes 15Hz.

My enclosure is 21 cubic feet after sub/port displacement, tuned to 15.42Hz. The port is a 7.75" sonotube 19.5" long, leaving 8.25" port clearance at the back.

external 42" wide = 40.5" wide internally

front 38 tall, rear 32 tall = 36.5" + 30.5"= 33.5" average height

bottom depth 30.5" top 28" = 29 + 26.5 = 27.75" average depth

40.5 x 33.5 x 27.75 = 21.788 cubs before sub/port displacement

7.75" x 19.5" = .532 cubes port displacement + .22 sub displacement = .752 total disp

WinISD with 21 cubes with 7.75 x 19.5 says 15.42Hz tune, and I round under, so close to 15Hz.

So here is my problem. Bass I Love You has a 16Hz tone. I had more excursion at the 16Hz tone than I did on the 30Hz and 25Hz tones. Please excuse the very poor quality of this video, turn your speakers down!

http://www.youtube.com/user/kryptonitewhite#p/u/31/zD9FU-SZLOY

also note, very little port velocity. that 2 liter bottle barrely moves, and not much air blew through without the bottle in it either.

Now here is sub_junkie's vid. He is 7.6 cubic feet tuned to 15Hz as well. IDK where his SSF is set to, but mine was at 15Hz. You can turn it back up for his vid.

http://s536.photobucket.com/albums/ff323/airsoftsniperm4/?action=view&current=UTGM324Gen3forSale005-1.flv

his excursion is just the opposite: more excursion on the 25Hz and 30Hz, very little on the 16Hz, as it should be, correct?

Here is another video of mine with a much better camera just to get a better view and listen of things. Please bear with me, it's a rap song, but the bottom note on this track is 26Hz I believe. Willie The Kid : Love For Money

http://www.youtube.com/user/kryptonitewhite#p/u/18/3jzenFwzkZk

same song, different vid

http://www.youtube.com/user/kryptonitewhite#p/u/17/yGWsO36WPtc

PLEASE HELP! THANK YOU!