Dual GJALLARHORNs! - Page 3

Sure do bro! Thats actually one of the reasons I brought it up here.

Suitable drivers for horns are a bit hard to find in that size. That's why I keep coming up with designs that use multiple smaller drivers.

I'm itching to do one big monster horn myself, but with funds as limited as mine it probably won't happen anytime soon. The Sundown 18 Zv3 has my attention at the moment, among others. Also waiting on the CSS SDX12, as the preliminary specs look decent.

Hmmm. Thanks for the link.

I suppose the XXX is not a suitable candidate? Lol...

Not really. Aside from the high cost, they're not that suitable for horn loading in the first place.

The 18 Zv3 is literally the only 18 I can actually see myself doing anything with right now.

No....Completely unworkable. The 12" could do something passable but it's not worth the attempt considering all of the logistical problems. Weight, frame, cost and motor size, low sensitivity, excursion clearance needed, etc...Alpine swr-1223d's are cheap though.

Has anyone actually tried this yet? It's marketed as an inert product, so it appears as though they are claiming that one should not feel any different effects opposed to laying a finished floor directly over your slab?

I haven't tried it yet, but the plywood or OSB sitting on top of it has way less mass than then cement slab below it, so I don't see how the wood could possibly transmit the same amount or less vibration vs. carpet on concrete. I also want to use it for the thermal characteristics, so I won't be heartbroken if it proves to be minimally effective on the tactile bass front...

My floor is layered 1/2" and 3/4" OSB over 3/8" Hardieplank sleepers with roofing felt between layers. It may be a little too stiff for what you want but, even with two layers, it conveys some tactile feel at high SPL. Warm feet with little height

Luke we used these...

http://woodworker.com/fullpres.asp?PARTNUM=812-452&LARGEVIEW=ON

I believe they are the same kind Danley uses. Just make sure you put a little glue on them when they go in.

JapanDave has some on his thread that were getting some high praise

You are comparing two 15's to two 12's. Assuming that was your point, I would go with the 15's.

yes will the two 15 AXIS blow away the two JL'S? Also will the 2 12 inch Axis best the JL 12'S?

Hello all, I've been getting the itch to try something new with a driver I have. It is a RCF lf21n451. I am hoping the GH and this driver may be a good match. Thoughts? Power would be provided by a NU3000DSP.

Any updates?

Those seem better than hurricane nuts for any sub/speaker application.

I used something similar from Lowe's on my builds. MUCH better than hurricane nuts...no alignment worries, no pull through, etc.

I'm scared for your house man.

I would use these, much better than hurricane nuts.
You don't need precise alignment, don't need glued in, will never pull out, much better bite into the wood, never cross thread, you can use any thread type, readily available, and they are cheaper!

I have used them on a couple of projects and will never use anything else going forward.
Edited by jpmst3 - 1/31/13 at 5:50am

I use those too and I have found them at Home Depot. MUCH MUCH easier to use. I don't use the Phillips head screws. I substitute hex head screws of the same size or you could even use a allen head screw.

Good idea on the screws! I never thought of substituting. But, that is another bonus!
Edited by jpmst3 - 1/31/13 at 5:37am

what size pilot hole do you use with those?

I can't remember, but it does not require much of one as they displace the wood as necessary just like any screw.

4500 w is getting into the danger zone according to the simulation. However I gave them more than that during testing and didnt clank a driver so the sim is a little conservative. Max excursion is around 23Hz. That is also right in the output wheel house though and by the time you bottom a driver you should be somewhere near 15dB over Ref at the seats at least.

I think it will be fine. Just exercise a little bit of caution when you first fire them up until you get a grip on what they will do and how they handle the amp. I doubt you push the amp to clipping on these except for proving to yourself you can do it once or twice.

Definitely do a 14Hz highpass though.

4500W, damn, that is a load of power for any configuration, let alone a horn.

Luke, once this project is done, if you would allow it- I would love to come hear them. I wanted to build a pair but definitely will not be able to justify the cost with the wife.