Jared Borchardt wrote on Thu, 04 December 2008 00:12 |
As for the driver, I selected it because of it's similarities to the LAB12 driver. I assumed the Fs wasn't the best. But the Qts is almost the same as the LAB12 driver (0.40 vs 0.38), it's got 3.6T-M more BL than the LAB12, and only 0.8 dB less sensitivity. To me, it looked quite capable in comparison to a driver that I know performs very well in horn loaded situations. |
Jared Borchardt wrote on Thu, 04 December 2008 23:24 |
Lets see if I'm heading in the right direction. Would an 18" driver with these numbers be a better fit for horn loading?: Fs: 30.8 Qts: .28 BL: 27.1 SPL: 97.3dB |
Marjan Milosevic(MarjanM) wrote on Fri, 05 December 2008 12:18 |
Elliot, that is surely true if you think PD and Void. But you have access to 18Sound, B&C, RCF, P-Audio... that also has good drivers for horns. |
Art Welter wrote on Sat, 06 December 2008 03:56 |
Elliot, You said: "Especially, those that are capable in achieving 500 - 300 Hz full-space" Don't know what you were going for, but 200 Hz bandwidth was probably not it.. |
Tim McCulloch wrote on Sat, 06 December 2008 20:49 |
Hi Elliot- Art was referring to the typo in your post (500 - 300). Have fun, good luck. Tim Mc |
Peter Morris wrote on Sun, 07 December 2008 23:16 |
General comments - Your design looks fundamentally fine. - I would use a lower compression ratio so there is less stress on the cone. The 3:1 you have used is getting up there for “standard” cone materials and designs. - You don’t need all of those fancy curves for low frequency horns. - I would select a different driver eg. 18sound 18WL1400, RCF LF18X400, B&C (what ever the equivalent is) - In most situations the speaker would be used on the ground so I would use 1/2 space loading ( pi) when I model it. - If you are only going to build 2 of these boxes I would build some good double 18 reflex cabs instead. If it was only 4 cabinets I would shorten the horn to about 8 feet. - Use a lot of bracing – there is not enough in the LAB. |