Drivers & enclosure dimensions for dual opposed sub. - AVS Forum
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post #1 of 12 Old 07-09-2012, 09:46 AM - Thread Starter
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I am planning to have a cabinet maker build dual opposed sub cabinet to match my existing dual opposed sub in walnut finish that has 10.4" drivers. I want another sub in closely matched finish with similar performance & reasonable extension down to 20hz in a 2600sqft room. I am looking at 12" drivers & want to keep the size within 20"x20"x20". Can anybody suggest me the drivers for use as well as enclosure dimensions/plans & plate amp for this? I am contemplating Dayton HF 12" drivers. Want to keep the cost reasonable.
Thanks,

Vinod
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post #2 of 12 Old 07-09-2012, 10:06 AM
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Any particular reason you are insisting on dual opposed 12" drivers?  Dual opposed 15s could work in that size box, or a single 18" and would likely outperform your current and proposed design combined.....

 

15s are not that much more expensive than 12s of the same family, which is the reason for my comment on larger drivers. 

 

If selling your current sub is an option that might be beneficial, since mixing different subs is a bit of a crapshoot.

 

Having said all that, I like the Trio 12 as a 12" driver, and this kit is an excellent performer.  I can't model right now, so someone else will have to help you with that.

 

The Dayton Drivers are good quality drivers and perform admirably for their price.


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post #3 of 12 Old 07-09-2012, 10:07 AM
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Sure. Go with the 12" Dayton HF's. In fact, they make an 8ohm version which is perfect for dual opposed and that sized enclosure. My models show you could use 500-600w total before exceeded rated Xmax all the way down to the single digits. What amp were you planning to use? A Behringer ep4000 could power this with a single of it's two channels. So if down the road you wanted to build a second, you'd have the amp already installed waiting for more. biggrin.gif


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post #4 of 12 Old 07-09-2012, 12:14 PM
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Quote:
Originally Posted by NicksHitachi View Post

Any particular reason you are insisting on dual opposed 12" drivers?  Dual opposed 15s could work in that size box, or a single 18" and would likely outperform your current and proposed design combined.....

15s are not that much more expensive than 12s of the same family, which is the reason for my comment on larger drivers. 

If selling your current sub is an option that might be beneficial, since mixing different subs is a bit of a crapshoot.

Having said all that, I like the Trio 12 as a 12" driver, and this kit is an excellent performer.  I can't model right now, so someone else will have to help you with that.

The Dayton Drivers are good quality drivers and perform admirably for their price.

Nick,

Please point me to a 15" that works well in 1.25cuft. Thanks.

bg
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post #5 of 12 Old 07-09-2012, 12:27 PM - Thread Starter
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Thanks guys. The reason I want to stay with dual opposed is to have matching driver configuration to avoid any phase issues. I will certainly look at Trio12. I am planning to use Crown XLS1000 amp which I already have.

Vinod
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post #6 of 12 Old 07-09-2012, 12:39 PM
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Quote:
Originally Posted by vinodk View Post

Thanks guys. The reason I want to stay with dual opposed is to have matching driver configuration to avoid any phase issues. I will certainly look at Trio12. I am planning to use Crown XLS1000 amp which I already have.

 

Sealed is sealed no matter which direction the driver points.  I assume your current and proposed sub are to be sealed.

 

Phase issues come into play if you mix ported and sealed and/or if the highpasses on the different amps have different roll offs which induce phase shift.

 

Again, not trying to convince you one way or another, just some facts.


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post #7 of 12 Old 07-09-2012, 12:40 PM
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Quote:
Originally Posted by garciab View Post

Quote:
Originally Posted by NicksHitachi View Post

Any particular reason you are insisting on dual opposed 12" drivers?  Dual opposed 15s could work in that size box, or a single 18" and would likely outperform your current and proposed design combined.....

15s are not that much more expensive than 12s of the same family, which is the reason for my comment on larger drivers. 

If selling your current sub is an option that might be beneficial, since mixing different subs is a bit of a crapshoot.

Having said all that, I like the Trio 12 as a 12" driver, and this kit is an excellent performer.  I can't model right now, so someone else will have to help you with that.

The Dayton Drivers are good quality drivers and perform admirably for their price.

Nick,

Please point me to a 15" that works well in 1.25cuft. Thanks.

Start a new thread with your design goals and link me, I'll help you with what little I know.


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post #8 of 12 Old 07-09-2012, 06:07 PM
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I don't have a set project yet....still finishing up my PR Dayton 12HO. But I've been thinking about doing a dual-opposed Infinity 1262W in about 3cuft. Not many 12's model well in 1.25cuft, so you got my attention when you mentioned the possibility of using a 15 in such a setup. Most 15s I've seen like at least 3cuft, so you see why I asked. But I haven't really looked at too many.

bg
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post #9 of 12 Old 07-09-2012, 06:24 PM
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Unless I'm just way off base, isn't the 20x20x20 cube that the OP referenced around 3.5cf internal volume after dual 15" drivers and bracing, or about 1.75cf each?

[(19x19x19) / (12*12*12)] - (~.20*2) right?

That seems about right for sealed applications of a lot of 15s on the market, such as the SSD or Sundown Zv.3 15 or even some of the Dayton 15s?
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post #10 of 12 Old 07-10-2012, 06:35 AM
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I'll confess that I haven't checked many 15's in sealed enclosures. I would suspect the Dayton HO to work in that size though. I just assumed that most other 15's would need about 2.5cuft to get to a decent q. I know there's usually a good jump in enclosure size going from 12 to 15, and many 12's I've sim'd needed at least 1.5cuft sealed. That's what lead to my assumption.

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post #11 of 12 Old 07-10-2012, 07:20 AM
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Honestly, if you want a dual opposed in that size performance range, buy this.  You will not beat its performance for the coin and size limitations your talking period. 

 

THIS fits your size, and a single one of these would out displace at least 4 sealed dual opposed 12s........  Although I would drop the port tuning to at least 20 which might grow the box by 2" in one direction, add some bracing and double the front baffle.......


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post #12 of 12 Old 07-10-2012, 05:23 PM - Thread Starter
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I was thinking about Epik Legend but I am looking for something that will match the walnut finish on my speakers & other sub thus the DIY route. I might just do single 15" or 18" sealed in the end. Thanks for all the suggestions.

Vinod
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