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Dual OS = 8 LMS-U 18's above 20Hz? Geezus!
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Originally Posted by MKtheater 
Thank You, and vice versa, backing up subjective comments with real data. UXL-18 is greater than LMS 5400 above 20hz. Cap driver is close to UXL-18(x-max) so assuming the Cap driver is close to LMS 5400 above 20hz. Now horn load it and gain 10-12 dBs and now you have 4 drivers in one. Dual OS is like having 8 drivers 20hz and above. As stated, it is hard to compare in different rooms as well. If you want full band flat horns are not the best to get there. I would love to see an OS measured by Ricci.

Thank You, and vice versa, backing up subjective comments with real data. UXL-18 is greater than LMS 5400 above 20hz. Cap driver is close to UXL-18(x-max) so assuming the Cap driver is close to LMS 5400 above 20hz. Now horn load it and gain 10-12 dBs and now you have 4 drivers in one. Dual OS is like having 8 drivers 20hz and above. As stated, it is hard to compare in different rooms as well. If you want full band flat horns are not the best to get there. I would love to see an OS measured by Ricci.
Given the capability similarities of the LMS-U vs the OS driver, I would have to assume GP measurements between the OS and Gjallarhorn would come down to the design differences. I can't imagine them being that different from a overall performance perspective. Still, would be awesome to get all of Jeff's products out to Ricci for testing. I would never speak for Jeff, but given my brief experience with his products, I would bet that it would be great exposure and only bring more customers in! Let's pool a fund together to get Ricci a JTR pallet. I got $20 on it, probably need another what, $500 to ship a full pallet. Rally the troops!
Seriously, I might reach out to Jeff to see if he is interested in sparing a few products for shipping.
Damit… Forgot about return shipping… Blah…eff it, I got $40 on it…lol
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Where are your manners man! RMK throws out an invite and you don't reciprocate. Just extend the invite to him to experience your "tactical" greatness. I really don't know if going to visit RMK would be in your best interest. *Cough* Noesis *Cough-Cough*Originally Posted by edoggrc51 
Especially when the DEEP stuff doesnt do much in your room. Kind of defeats the purpose of going multipled sealed for the added extension.
You know what would be interesting? Having one of our quad LMS systems in RMK's 2nd floor room. Wonder what he would think about sacrificing some (wasted???) headroom for the extension?

Especially when the DEEP stuff doesnt do much in your room. Kind of defeats the purpose of going multipled sealed for the added extension.
You know what would be interesting? Having one of our quad LMS systems in RMK's 2nd floor room. Wonder what he would think about sacrificing some (wasted???) headroom for the extension?
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Originally Posted by MKtheater 
Based on Ricci's measurements of ultra vs sealed UXL-18. The OS has a sealed 18 so from 15-19hz or so the ported 13 does well. The horn only loads from about 21-22hz and up which then acts like 4 sealed 18's and again, no contest. So if we take near equal 15-19 hz performance but gets slaughtered everywhere else I would bet lots of money which one would be preferred. Of course sealed vs sealed the 18 wins, or ported vs ported, etc...

Based on Ricci's measurements of ultra vs sealed UXL-18. The OS has a sealed 18 so from 15-19hz or so the ported 13 does well. The horn only loads from about 21-22hz and up which then acts like 4 sealed 18's and again, no contest. So if we take near equal 15-19 hz performance but gets slaughtered everywhere else I would bet lots of money which one would be preferred. Of course sealed vs sealed the 18 wins, or ported vs ported, etc...
Lol… some small windows there.
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Originally Posted by Frohlich 
I have an honest question for you guys about subwoofers since you understand the science of it much better then I do. All this capability the OS has above 20HZ...isn't it just headroom. In other words, if you are playing reference level for example and the scene has bass which requires 75db at 30hz and all three subwoofers (SVS 13, S2, OS) can play that loud, then the fact the the OS COULD play it much louder does you no good since the scene doesn't call for it? Is it just theoritical headroom that never gets tapped into unless you really crank the volume knob?

I have an honest question for you guys about subwoofers since you understand the science of it much better then I do. All this capability the OS has above 20HZ...isn't it just headroom. In other words, if you are playing reference level for example and the scene has bass which requires 75db at 30hz and all three subwoofers (SVS 13, S2, OS) can play that loud, then the fact the the OS COULD play it much louder does you no good since the scene doesn't call for it? Is it just theoritical headroom that never gets tapped into unless you really crank the volume knob?
Correct. Using your example, at 75db I would say that you could not tell a difference from any of those subs in your space. I know at the last sub get together I went to, I found no notable differences in most of the contenders while playing at 85db.
With that said.
Headroom = Flexibility
Flexibility to optimize your response (if you have the correct equipment) how you want and easily accommodate when you get that urge to cut loose! I've yet to hear the OS, but have heard dual Caps in action and they were absolutely AWESOME. Now, if you are looking for a flat response and play no louder than reference (115db for subs), the OS would indeed be overkill and start to roll off around the horns tune @ 20(ish)hz. In your particular scenario you sound like you would be more of an S2 guy.
Just don’t do what Luke did and audition an OS to realize that you do in fact enjoy 130db+ showoff sessions!
I'm a member of the sealed alignment team as I would prefer having reference extension from 2-80hz vs crazy output above 25hz. All of my favorite frequencies are below 25hz anyway…




















