12" driver recommendations?

I am planning on building a small sub (~18" cube) and I am going to do sealed or a single 15" PR. I plan to use the Behringer EP2500, and I haven't decided what I will do for a highpass filter yet if I go the PR route. If I do a PR, I was thinking the Exodus PR-15.

Anyhow, I would like some opinions on some of the drivers I have been considering. I have modeled all of them, and I have some preferences based on that. What the graphs don't show is what they will sound like or if there are other issues that I am unaware of. I am considering the Fi BTL12, SoundSplinter RL-P12, Audiopulse Axis 12, and the RE Audio XXX 12. Does anyone have any opinions about any of these based on my application? Are there any other drivers you would suggest over what I have listed?

Thanks,
Brian

Is yours sealed, and what kind of FR do you get in room without EQ?

Yes, I plan to use EQ, but I haven't decided which yet.

I have considered the 2.2 cu.ft. Shiva-X design with a single PR from the diycable website. It looks pretty good, but I am not sure about the O-Audio plate amp. If I ever decide to switch to a ported design, it doesn't seem like it would work well. As a result, I would rather buy something that is more versatile, so I can re-use the amplifier if I decide to change things up. I wish the Shiva modeled better in smaller boxes, because the price is certainly more attractive than the others I mentioned.

I was afraid that without the 5db boost from the O-Audio amp, it might not be as flat as I want.

I have no experience in this area, but I assumed it would based on this post.

http://www.avsforum.com/avs-vb/showp...2&postcount=19

This wouldn't be as much of an issue if there were more PRs to choose from. I wish I could get a pair of those Audiopulse 12" VMPs.

I hadn't considered depth, but thanks for pointing it out. It looks like they may fit if they are mounted in opposing positions. None of them have a depth greater than 8", and the PR-15 has a depth of 5", so that leaves 5" in between. Is that not enough? If not, what is the minimum clearance that I need?

I am not understanding why I would need more than 1 15". They look fine to me in winisd with a single 15 or two 12's. The extension isn't anything to brag about, but I don't expect it to be either.

My primary objective is to get flat to 20hz in as small of a box as possible. So I am open to any suggestions anyone has that may be better than what I am considering. If that is sealed with eq, then I am open to that.

I am limited to 18" high, but there is some flexibility in depth and width.

I am going by the depth listed on each manufacturer's website, since that is really all I have to go by. Exodus doesn't mention weather or not the depth is with or without the bolt.

Here is the FR from winisd. The blue is the Audiopulse Axis 12" with one Exodus PR-15, and has 1100g of mass with no stuffing. The white is the SoundSplinter RL-P12 with one Exodus PR-15 with 900g of mass and light stuffing. I realize that I am leaving some performance on the table, but isn't that to be expected considering my small box constraints?



Getting back to your sealed suggestion. Could I do something like a JL Audio 13W7 in a sealed box with a DCX2496 and pro amp and get similar performance to the Fathom113? Something like that is really what I am after, a small box that is flat to 20. I don't necessarily care how I get there as long as it costs a lot less than the $3k of the Fathom, and has good sound quality.

I don't expect to get a free lunch, but I am hoping that I can save some money by doing the build myself.

WAF

I could go slightly bigger in width and depth to maybe 19-20", but that would be about it.

When modeling in WinISD, do you enter the value for what you want to give each driver, or do you use the cumulative amount if using multiple drivers? I would like to compare the 4 Peerless option to some other options, and I want to make sure I am making a fair evaluation.

BTW, 4 Peerless subs is $715 at PE before shipping.

Any ideas what a comfortable minimum depth would be between opposing drivers? Two SoundSplinter RL-p12s have a reasonable 7.3" mounting depth. Two of these seem to provide more output than 4 Peerless XLS 12's for less ($560 for 2 drivers). One thing I noticed is that the Q is really low (a little over .4). I know that a Qtc of .7 is suppose to be ideal, so how would that affect the sound quality?