CurtPalme.com Home Theater Forum

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

I skimmed through this quick so if I'm repeating someone, sorry. But if this is a down firing sub and your floor is carpeted then try placing the sub on a piece of plywood or flat board and see if that increases your punch.

rabies_70 · Posted: Sat Nov 07, 2009 4:07 am Post subject:

I believe it is difficult and expensive to attempt visceral bass without an infinite baffle.
http://ibsubwoofers.com/

I have 4 of these 15"

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-455

Powered by a Mackie fri1400 bridged

Positioned in front more or less center of the screen/room

EQ'd with a Behringer 1124 feedback destroyer

and room EQ wizard
http://www.hometheatershack.com/roomeq/

Bass traps in all the corners and acoustic treatment panels on walls.

Bass so low it shakes you in your gut. Hell it can actually shake the whole house. Distortion free. It's a very musical sub when it needs to be and a ass thumping movie sub all the rest of the time. Speakers barely moving at all too.

You can mount them so they are invisible to the room as well through a manifold no bigger than an air intake for a furnace. I just wanted to see mine.

On the cults website there are some really nice finish quality builds.

Go inifinite Twisted Evil

ecrabb · Posted: Sat Nov 07, 2009 4:49 am Post subject:

Ray, so you have what, about a grand or so into your IB setup? That's about what I'm looking at with the eD sub, and should have usable response down in the 10hz ballpark, and at or above 100db. Where does your usable response stop, i.e. where you down 3db, and what kind of SPL are you getting at, say 20hz? Just curious.

I'll also just point out (again), that most of us do not have houses conducive to an IB setup (Gary included, I think)... Or, even if we do, if isolation is a concern, then an IB setup is a non-starter. In my case, IB would run completely counter to my goal of being able to watch at a reasonable volume at night with the kids in bed.

SC

ecrabb · Posted: Sat Nov 07, 2009 5:19 am Post subject:

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Oh yeah, totally relevant. You're looking to spend more than I would, and I think you're more willing to take on finishing/etc jobs than I would be. (I don't have any kind of usable spray setup so I have to buy, & learn to use properly, some kind of sprayer in addition to the rest of the job.)

And I agree completely about Ray's IB comments. IBs are very cool but there is NFW I could use one. I have concrete on 2 sides & floor of my HT, and un-breachable spaces on 1 side & ceiling. The only conceivable way I could put an IB in my HT would be to use the equipment closet as the baffle space. But that means the rest of the house would get about as much bass as the HT, and as you say that's NOT a viable solution when there are other people in the house. If it was just you & your wife, AND your wife always watched movies with you in the HT, then who cares if the rest of the house is shaking? But that's not my situation.

Mac, I'll try slipping a board under the sub, but I would be VERY surprised if that made any difference. There's just carpet and pad on top of the concrete floor, and the carpet is going to be 99% transparent at subwoofer freqs. As far as the sub can tell, it's firing directly onto concrete.

dturco · Posted: Sat Nov 07, 2009 5:31 pm Post subject:

Just dig a hole like this Guy did. Mr. Green

http://blog.makezine.com/archive/2008/07/worlds_largest_subwoofer.html

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Even if I was that crazy, and even if my wife wouldn't have me committed if I tried it, that sort of thing works a whole lot better BEFORE you build the HT on top of it...!! Laughing

dturco · Posted: Sat Nov 07, 2009 6:11 pm Post subject:

Why not Gary? Econmic stimulus. You'd have a shovel ready project. Embarassed

Oh and also found the whole article.

http://www.royaldevice.com/custom.htm#THE%20REAL%20TOTAL%20HORN