[bassman_soundking]

Hi, I was wondering what criteria you would use to determine which is better?
Are 4 18's in a baffle going to be better than 2 15 LLT. Is the baffle for people who dont have room in listening room for llt enclosures?
Are baffles more sonically correct? Please help me understand. :dunno:Thanx

 

[Sonnie]

Re: Ib or LLT

Which is better will hinge on a LOT of information needed to determine the answer, although it might end up coming down to mere preference of design.

About the only comparison we have between the two right now is Rodny's IB Makeover thread. In his case, the LLT system edged out the IB. In this system, his LLT did not take up any space in his room, he enclosed it from the attic and ported it into the room. This what we call the SLLT (Structural LLT).

Generally the LLT will cost less because you will need less drivers. Both can be very accurate if designed properly... however the LLT can be tuned, which might help you get a lower response that will be unknown with the IB.

You can always try an IB and if you don't like it, you could enclose it like Rodny did. :huh:

 

[Mike P.]

Both types can be sonically correct if designed properly. Both have pros and cons. IB pros - doesn't take up any room. cons, requires more drivers to match SPL of other designs. LLT pro's, cheaper than an IB for same SPL output, cons, large cabinets take up floor space.

 

[bassman_soundking]

Thanks, thats what I thought. I'd still love to hear and feel an ib setup with a dozen 15" drivers or more. :scared:

 

[bassman_soundking]

Re: Ib or LLT

I just had to know if it was a driver per driver swap in output. and ive realized there would be a huge difference in output with same driver compliment for each setup compared ditectly. Im not rich, so the ib wont work for me. I have to stick with big clunky boxes, lol.

 

[Mike P.]

Re: Ib or LLT

That should be big clunky high output boxes.

 

[mdrake]

Re: Ib or LLT

Well, Ficar sells their IB 18 for 200.00 which means you can get 2 ficar woofers for almost the same price of one SS or Exodus 18.

 

[bassman_soundking]

Re: Ib or LLT

Im sure there is a lot more involved in a baffle than I know anyway. Id have to dedicate a room to get pummeled as hard as the theater is. Who would want to be in that room? Im sure there is a formula to determine if the rearwave room is the right size etc....

 

[Mike P.]

Re: Ib or LLT

Optimum rear chamber for an IB is 10x the Vas of each sub. Half of that volume has been shown to work well.

 

[Fi Audio]

So would I We have one customer eagerly waiting on the 22s to the tune of a dozen of them. I can only imagine what that will feel like.

 

[bassman_soundking]

how much power can they handle in an ib setup?

 

[SteveCallas]

If you have a spot for the IB, you can always just enclose some of that space to make the LLT enclosure as Sonnie suggested. That way the LLT isn't taking up any space inside the listening room. Driver for driver, the LLT will offer flatter, deeper extending response with less distortion and greater output levels. On the other hand, the IB is extremely easy to build.

 

[bassman_soundking]

If you have a spot for the IB, you can always just enclose some of that space to make the LLT enclosure as Sonnie suggested. That way the LLT isn't taking up any space inside the listening room. Driver for driver, the LLT will offer flatter, deeper extending response with less distortion and greater output levels. On the other hand, the IB is extremely easy to build.

So basically make the 10-14ft^3 LLT box and put it in the other room and feed it into the room through a hole in the wall like the way an IB would vent it?

 

[Mike P.]

Yes. And the amount of cabinet volume is dependent on which sub you choose.

 

[cdy2179]

2 FI 18's have over 14 liters of displacement ( they custom built these speakers just for IB applications) , more displacement than 4 AE 15's, you don't have to spend a fortune to go IB. I have 2 FI 18's and they are more than enough in my dedicated HT. They are cleaner, faster, deeper, more eyebrow vibrating and more accurate than any box i've ever heard. Of course i haven't heard everything, but i have heard a lot of box subs, Diy and commercial, And i've owned and built several. After a month i still can't beleive how awesome it sounds even my wife is hooked. It's in a league of it's own. Of course it's just my opinion.

 

[Sonnie]

You should hear Rodny's LLT's (and he had a 4 driver IB system), or my Behemoth... or my Pulse... or any number of LLT's. Rodny's though, was the one that was measured to prove the results were not just subjective.

Granted, an IB system is very good and in most cases it will outperform commercial subs and many DIY subs, this is very well understood. :T

 

[cdy2179]

There seems to be a huge importance on getting to super low hz. Of course IB and LLT can do it, but IB is much, much more than that, IB is also great for undistorted, fast, perfect sound. There's no box to restrain cone movement, no box for rear waves to bounce around, Your cone doesn't have to force air through a port, the speaker moves freely, faster, more accurate. You get alot more than what a FR can show. It's the quality of what hits your ears that'll gives you the WOW factor.

 

[Mike P.]

IB is also great for undistorted, fast, perfect sound

By "fast" I hope you mean accurate. Any properly designed subwoofer is accurate.

Your cone doesn't have to force air through a port

No ported subwoofer forces air through a port. The port is resonating, the air in the port is moving back and forth at the resonant frequency. Only when the port is not big enough to keep the air speed under 26 m/s does port compression set in with negative effects. It's all about proper design and application.

 

[cdy2179]

Ever heard of port chuffing?? If the cone is moving so is air.

 

[Mike P.]

You statement implies the cone is "forcing" air through the port. That's not how it works.