2 15" 20mm+ xmax driver options sub 200 dollars? - diyAudio
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Old 12th April 2012, 07:01 PM   #1
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Default 2 15" 20mm+ xmax driver options sub 200 dollars?

I have a pretty big order to fill.

I currently have a 9 cubic foot enclosure housing a single 18" McM pa subwoofer driver. My brothers and I built it 12 years ago and it's still running strong. However it's output and bass extension is unacceptable. I would like to modify the enclosure to fit two 15" drivers.

My goal is extension to 20hz. I personally am not too interested in output below that. Right now the 18" has usable output down to 30hz, at low spl.

Are there any drivers on the market right now that cost not much more than 200 dollars each that would fit the bill?
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Old 12th April 2012, 08:56 PM   #2
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I assume you are going with a sealed enclosure? With that much enclosure you might be able to go with a pair of 18's. Maybe something like these: Fi. Assuming you are just using them for subwoofer duty. I think the inductance is fairly high on those so you wouldn't be getting much above the subwoofer range.

Otherwise the Dayton RSS390HF-4 are pretty highly regarded inexpensive 15's that would work well in an enclosure that large.
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Old 12th April 2012, 09:41 PM   #3
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I would second the RSS 390 HF drivers from Dayton Audio, sold by Parts Express. These don't have over 20mm Xmax (more like 15mm), but I would be surprised if your old pro driver has over 5mm Xmax.

Another option would be to go with three 12" subs. There is one that comes to mind, sold by Creative Sound Solutions (CSS), called the Trio 12 ($150ea) that has 20mm Xmax and a good motor.

-Charlie
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Old 13th April 2012, 03:40 PM   #4
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I actually will be going with a ported design.

15" drivers are all that I can fit on the front baffle. Believe me, I would be using 18" drivers if I could fit them.

More than 2 12" drivers wouldn't fit. The front baffle is 36x24 inches. I will be putting the port in the rear.
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Old 13th April 2012, 03:57 PM   #5
tb46 is offline tb46  United States
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Hi hornloaded,

If you have a little time, these are currently out of stock, due 6/27/2012:
TC Sounds Epic 12" DVC Subwoofer 293-650
or on the low end of the price scale (but may need a bigger box if vented):
http://www.parts-express.com/pe/show...number=295-206.

Regards,
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Last edited by tb46; 13th April 2012 at 04:06 PM.
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Old 14th April 2012, 12:12 AM   #6
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What is the tuning of the box? 9ft^3/ ??Hz

Also how large are the ports, area and length? I mention this because all that Xmax may require a port rebuild to keep the box from becoming a wind machine.

Last edited by revboden; 14th April 2012 at 12:14 AM.
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Old 16th April 2012, 03:55 PM   #7
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Quote:
Originally Posted by hornloaded View Post
I actually will be going with a ported design.

15" drivers are all that I can fit on the front baffle. Believe me, I would be using 18" drivers if I could fit them.

More than 2 12" drivers wouldn't fit. The front baffle is 36x24 inches. I will be putting the port in the rear.
Using slot loading you could potentially fit as many as four 18" speakers or six 12" speakers in that baffle size, with room for ports on the front.
Four 15" would easily fit.

(I I)
(I I)

"(" = cone, "I" = slot, viewed from cabinet front.

The speakers could be mounted push pull (with the "backwards" cones wired with reversed polarity if you wish to reduce even order harmonic distortion.
(I (I
(I (I

Art
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Old 3rd May 2012, 02:48 PM   #8
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Quote:
Originally Posted by hornloaded View Post
Are there any drivers on the market right now that cost not much more than 200 dollars each that would fit the bill?
The Alpine SWR1522D is a 200 dollar 15" that has a 21mm xmax and reaches 20HZ flat in a 4 cubic foot ported box tuned to 20HZ. I run one in my living room system with a dayton 1000watt class AB plate amp and its really clean sounding high quality bass. I get really good output even at 15hz. Use a 6" port. I run a 2.5x15.5 vent but it kicks up the box volume over 5 cubes for the vent volume.

I run the exact same 4 cube net box with that 15 in my hummer with a Rockford Fosgate 4000watt amp and I cant believe the power it takes after all these years.

Run the specs for yourself. Its for real. The SWR1542D is two 4 ohm coils instead of the dual 2's in the 1522 and it needs a 5 cube net box extending to 19HZ flat. The advantage of the dual 4's for me was the higher damping factor since power wasnt an issue but tighter bass from better control was audible. I've run both models.
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Old 4th May 2012, 02:24 AM   #9
mdocod is offline mdocod  United States
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Hello hornloaded,

The Dayton TIT400 for ~$233 each comes to mind. 20.5mm xmax....

As far as venting 2 of these in a 9ft^3 box goes... That is a bit problematic. I suggest tuning below your desired bandwidth to avoid chuffing issues. A 6" flared port, as long as will fit on the longest dimension of that box (~30" length), should get your tuning down around 15hz, and your peak air velocity @Xmax@20hz down to a reasonable 15m/s.

The simulation below is at ~2000W@1M

Regards,
Eric
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Old 7th May 2012, 01:41 AM   #10
NEO Dan is offline NEO Dan  United States
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What model MCM driver do you have?
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Dan
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