"The Grizzlies" Twin Dual Opposed Stereo Integrity HT18 Subwoofers - Page 6

You Shutup You!!! I am going to, soon as the paint/stain dries on the LCR's...haha No making dust during the finishing, duh...

I also dont even plan on sealing up the FP, just put some closed cell around the outside and the speaker cutout and screw it in, haha quick and dirty

Since it is just temporary, i will basically have some closed cell sandwiched between the old baffle and the add-on baffle to make it fit. I am not going to go through the trouble of flush mounting it for these. I will save that for the real boxes

Great thread, I am working on my (4) SI sub cabinet too, really anxious to get it cranked up as well. Went with the 18" models

They look great Brian, nice work man. I know it's apples to oranges, but how is the sound compared to the pair of thtlp?

Bring the dual 18's to my place and we could A/B them! (I bought Brian's thtlp's) Hell, we could hook up my M&K mx-5000-mkii & B&W ASW-855 too and break my foundation!!!!
Edited by motorcitym3 - 1/23/13 at 8:58am

nice work. a "matching set" with your mains. really nice combo you have there!

Sweet setup!

Where did you get your TS parameters from?
They are quite a bit different from the ones posted on their site.

Your chart looks really good! Did you measure from the listening position?

My suggestion: Try one of the subs nearfield or add another in that area if possible. There really is no substitute for those on concrete slabs, IMO.

Edit - Just saw your pic and looks like you've got the subs on either side of the couch, correct? Might need to experiment a bit with placement.
Edited by Gorilla83 - 4/19/13 at 8:00am

Buttkickers.

Have you measured the response at the LP? You might be sitting in a slight null, whereby moving the subs around might provide some improvement.

Ive been reading every 18" build thread I can find. Jsut made it through yours today. Awesome job, man. Motivational stuff. Good luck with your nulls. Im no pro, but i bet they would be sweet posted up right behind your couch there. or just add some more (i learned that on these forums.. the best solution = add more subs. If your room is 3000^3 ft, and 2000^3 feet are taken up by subwoofers, there is little chance of any nulls. lol)

let us know how it works out for you.

These subs are awesome aren't they?

I would have preferred going with a smaller, longer box like yours, but it would not have fit where I needed it to go. I'm using a net of 10cu ft.

What mains are you building again?

Just read this thread, nice job on all counts.

Consider this;
If you're still interested in the tactile element, ... place the rear sub near-field, evenly behind you, and with a Behringer DCX2496 (or equiv) carefully time align front and rear sub separately, then EQ globally. Also, by tweaking low pass of each, the acoustic summation varies, and with all these tools, you can retain the bass "upfront", yet elicit the tactile immediacy you're after.

As you know, the near-field placement yields a by product of FR smoothing, because you're getting more sub, less room,..relatively speaking (just like close mic measuring). This fills in most all modal nulls, yet with judicious time alignment (and careful low pass adjustments), you weave the LF properly into the mains, yet you gain back the tactile component you're missing from the concrete slab.

Anyway, just a thought,...I'm guessing you've tossed all this around many times.

Nice job documenting, I'd like to see more and better FR graphs, but that's really getting picky in an otherwise well executed build.


Just a thought
Good luck

(remember, when fine tuning in the time and freq domain, keep going back thru the steps, as each parameter affects the acoustic summation perhaps subtly and differently, so going thru again and again is a must, IMO, time align separately, EQ globally,..with exception of low passing)