My first home theatre build, need help

I would tune down to about 21 if you can. Lots of movies these days have sub 20Hz stuff slamming through...
I can't model it here, but if it isn't answered by tonight I'll check it out for you. Do you have the T/S on the woofer?

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I'll try and get them. Thing is the parameters Eclipse provides you aren't accurate at all, but I remember somone posting the actual parameters not too long ago so I'll try and find them

Tuning down that low wouldn't be a problem. Like I said I'm kind of swinging in the dark here so I appreciate any and all help

Thanks

Also, I do like downfiring woofers, but it isn't necessary....
What are you planning on using for power?

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Ok cool, wasn't sure on the whole downfiring thing.

As for power I'm not sure at all. Do you have any recommendations for a good 1000-15000 watt power source?

They say certain subs are suited better for downfiring, but that can only be figured by audiophiles, and even then it is still subjective. I've downfired plenty of subs and have enjoyed them all.
you won't need that much if you are only running one of those guys. It's rated at 750, right? I bet 500 would be enough, no more than 650 for sure since you are putting it in such a massive enclosure..... if you find those specs I can tell you how much would be good.

as for amps around 1000, there are a couple on Partsexpress website, eD makes a 1300 watt amp that I used and loved, and you can also look at some proaudio amps if you wanted.....

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Thanks, the more I thought about it and saw what other people were running I was starting to lean toward a nice 500 watt amp. The reason I suggested 1000 watts at first is because most people throw ~1500 at these subs so I figured 1000 would be enough in a box like this.

I'll look into those amps you suggested. As for the T/S parameters, I'm having trouble finding the "right" ones. But here's one set:

Fs: 27 Hz

Qts: .39

Vas: 6.10

SPL: 91dB @ 1W/1M

Voice Coil Re: 3.1 + 3.1

Power (Peak/RMS): 750/1500

Qms: 5.0

Qes: .42

X-max: 1.75" (one way)

Sd: 800 Sq Cm

Generally you tune lower for HT... in the mid teens if possible/practical. Need the TS in order to make a good recommendation...
For power 500 watts is really plenty. You don't need as much power because you don't have to overcome road noise and huge HT enclosures are more efficient.

I ran a Dayton Titanic MKIII 12" in 3.5 cubes tuned to ~20 hz powered off a PE 250 watt plate amp. Had very impressive output and SQ, after EQ'd was able to get flat down to 18hz.

I replaced that with an AVA15 in 5.5 cubes tuned to 15 hz powered off a BASH 500 watt plate amp. It actually sounds cleaner than the Dayton on both movies and music. Plenty of headroom.

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Thanks for the info. I've heard good things about that Dayton Titanic. Haven't heard too much about the AVA but the fact that it out-performed the Dayton speaks volumes

Again thanks for the info and I'll work on getting the real set of parameters, but I think the one's I posted are close....

If you can get me some T/S, I'd be happy to help you out //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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Thanks, I know you have your enclosure designs down to the wire after reading through your other thread

I'm trying to get the real set, just waiting on a response from somone. Seems like there was a lot of confusion with these woofers on the t/s params

Here's another set I found:

Fs = 27Hz

Qts = 0.43

Vas = 6.10 cuft

DCR = 4ohm/coil Xmax(one way) = 1.75"