Originally Posted by ht-core
Well for the past few month's i have been looking into building me a couple of 15" sub's to place in my "room". Was first thinking of buying a TC Sounds LMS-Ultra 18" but have been thinking that i would want to have enough capability so i can get that low 14-16 Hz at 120 or so not to familiar with building enclosures but have a hell of a drive when it comes to perfection in my line of work so long story short, I have high expectations of myself. Room layout is 14' X 14' and 8' ceiling's but it has a closet that's 11' x 2'.
Ok, let's do some simplistic math really quick.
You've stated your goal of 120db at 14-16Hz.
I'm assuming you've paid Data-Bass
a visit and have seen the ground plane measurements for the various systems that have been tested. I'm going to break this out with the general assumption that you can expect add 6db on top of the ground plane measurements for room gain. I'm also going to use the general rule of thumb that when you double the displacement you gain +3db and when you double the amplification you add +3db.
On to the math.
LMS-U Sealed alignment CEA Max burst @ 16Hz
1 LMS-U = 104db + 6db room gain = 110db
2 LMS-U + double power + room gain = 116db
4 LMS-U + double power + room gain = 122db
Adjust down a few db for results @ 14Hz and that would get you close to your 120db goal. Of course this is a very simplistic breakdown of the results one could expect, but should give a good ball park.
With that said, those results are indeed for the LMS-U, NOT the LMS-R. The only way I see LMS-R's getting you to your stated goals would be in an LLT or if you horn loaded them like the LMS-R loaded DTS-10 kit
tested on data-bass. I hear that's a very large box though. I will defer to others with more experience on ported designs...
Originally Posted by braveheart123
No worries ..... you are headed for bone jarring bass nirvana may it be TC sounds driver or dayton. The later will get the job done very cost effectively. I'm not a big fan of sealed subs. So, would suggest to look into ported designs IF size is not the issue. Happy building.
I think you might find this to be an interesting read:KC Blind Subwoofer Shootout
The goal of this shootout was to see if people could actually distinguish the difference between sealed, ported and horn loaded subs. Very very good read for individuals with a particular design bias.
Originally Posted by ht-core
I would like clean,deep,articulate bass. I guess it's the all time quest for perfection. just seeing if flat response to 16 Hz is possible without a 900lb gorilla in the corner of the room.
Again, I had dual sealed LMS-U's in a similar sized space (which was open to the rest of the basement) and it sounded phenomenal. If you don't want a 900lb gorilla (LLT) in your space, I am anticipating it would take more subs to reach your goal 120db @ 14-16Hz goal.