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WO with 15s.... (Read 7865 times)
Wrayza
Ex Member



Re: WO with 15s....
Reply #15 - 10/28/04 at 07:58:24
 
Yes, but a 10" driver would have to move quite alot farther than a 15" driver to make up for the lesser cone area.

A 10" driver has roughly 78cm^3 cone area
A 15" has roughly 176cm^3

So the 10" would have to move roughly 2.25 times the distance of the 15" to achieve the same SPL at a given frequency. Of course thats assuming they both have the same sensitivity.

That is still alot more movement, and think about the excursion required to generate low frequencies such as 30Hz...

Cheers, Mike
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BigAir
Ex Member



Re: WO with 15s....
Reply #16 - 10/28/04 at 11:19:34
 
Why compare long excursion 10's to regular 15's.  That's comparing apple to oranges, right?  If you're going through the trouble of building a WO for 15's because you want it to be louder, you might as well load it with powerful 15's just as would have loaded your 10" WO with powerful 10's.
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60ndown
Ex Member



Re: WO with 15s....
Reply #17 - 10/28/04 at 11:54:23
 
just thinking out loud Roll Eyes
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boxmaster
Ex Member



Re: WO with 15s....
Reply #18 - 10/29/04 at 00:56:52
 
why, why, why.  the mods are not needed. wickedone with dhm 108 s, a nine volt driver and one kicker 500.2......160dbs.so clear, so tight and hits so fucking hard you ll almost puke at times!!!!!! i have heard many many sub applications from 100$ to 5000$ and nothing sounds like this box driven correctly. my hats off to steve time and time again... have fun and peace....
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60ndown
Ex Member



Re: WO with 15s....
Reply #19 - 10/29/04 at 02:29:56
 
9 volt driver?
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bigmike216
Ex Member



Re: WO with 15s....
Reply #20 - 10/29/04 at 06:10:00
 
Line driver I think he means.

160db's? Am I the only one to call bs?
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60ndown
Ex Member



Re: WO with 15s....
Reply #21 - 10/29/04 at 14:18:01
 
you mean increasing the signal strength from the head unit from about 2 or 4 too 9? into the amp?
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60ndown
Ex Member



Re: WO with 15s....
Reply #22 - 10/29/04 at 14:21:47
 
dunno bout bs, whats the power output of the kicker?whats the world record for spl db now days? wo is a good desighn with 2 of steves subs and a good amp in a small space?
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Tr3vWh0r3
Ex Member



Re: WO with 15s....
Reply #23 - 10/29/04 at 16:57:09
 
I know a DBDrag competitor hitting 163 with two 15" Juggernauts and about 3000 watts per sub. I'll second the bs call, but im sure it does hit hard.  ;D
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bigmike216
Ex Member



Re: WO with 15s....
Reply #24 - 10/29/04 at 22:50:53
 
I don't doubt it hits hard at all!
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boominastro
Ex Member



Re: WO with 15s....
Reply #25 - 10/30/04 at 05:58:08
 
sooooooo, If I angle it too much I won't have enough sealed air space for the subs???
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Wrayza
Ex Member



Re: WO with 15s....
Reply #26 - 10/30/04 at 12:05:39
 
The sealed chamber space shoudn't be effected if you angle the baffle correctly.

Mark the centre point where the baffle is designed to go, and pivot it until theres enough angle to allow for a 15".
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Braggi
Ex Member



Re: WO with 15s....
Reply #27 - 10/31/04 at 18:31:05
 
Back to comparing long-excursion 10s vs. 15s there is a very good reason to go with larger drivers. The less the excursion the less the distortion and the less the strain on the driver. "Effortless" is the word for all the best bass reproducers. The less the driver moves to achieve the SPL the better.
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kmon
Ex Member



Re: WO with 15s....
Reply #28 - 11/04/04 at 18:09:52
 
nice work guys, i was wondering what kindof mounting depth you had with the baffle at that extreme on an angle. Maybe i could invert the sub and fire into the sealed area? If i have to go with 12's my feelings wont be hurt too bad but having 15's would be nice.
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lunarlab
Ex Member



Re: WO with 15s....
Reply #29 - 12/06/05 at 20:18:14
 
[quote author=kmon  link=1098662008/15#28 date=1099591792]nice work guys, i was wondering what kind of mounting depth you had with the baffle at that extreme on an angle. Maybe i could invert the sub and fire into the sealed area? If i have to go with 12's my feelings wont be hurt too bad but having 15's would be nice. [/quote]
I built a 12 inch version with MTX thunder 9000's for a friend. MTX amp with 600 watts RMS bridged at 4 Ohms.  I  mounted the speaker inverted and in reverse phase.  I calculated the speaker displacement and the amount of volume I lost in the sealed side when angling the baffle.  Turning the speaker around kept the box volumes the same as before modification so the tuning would be the same....although I modded the port area to allow more airflow.  I also added some bracing in the ported side to take up some space....just try to keep your box volumes equal in ratio.  Also a note of interest....Horn mouth size is in direct ratio with cone area. 15 inch speakers have twice the cone area as ten inch drivers.  In my opinion the horn mouth should be twice the size then.... You decide. ???
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