Cubo vs Cubo extended |
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Cheekybox
Registered User Joined: 04 October 2014 Location: Smoke Status: Offline Points: 104 |
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Posted: 17 April 2018 at 2:49pm |
Is anyone able to give me some info on what the difference is between the regular and extended version of the Cubo 18?
I can't seem to find much online. Is there much of a difference? And, if you mixed them - say, 2 regular one side, 2 extended the other - would that be much of a problem? Thank you. |
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Few Hz extra extension in exchange for a loss of output sensitivty. Drivers will reach xmax a bit faster too. You shouldn't mix them, but it won't totally ruin the sound if you do. Definitely don't mix them unless you absolutely have to. If you have some of one kind and are looking to buy/build more, buy or build more of the same.
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Cheekybox
Registered User Joined: 04 October 2014 Location: Smoke Status: Offline Points: 104 |
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Thanks, Hemisphere.
Do you have a preference of the two boxes?
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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I would go with Cubo18.
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Jasonstry
Young Croc Joined: 11 September 2007 Location: Cannock. J11 M6 Status: Offline Points: 1367 |
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Or, if you haven't already, you might want to have a look at the Cubo Sub.
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Down with signatures!
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charlysays
Registered User Joined: 16 June 2015 Location: Wales Status: Offline Points: 413 |
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Second that. Cubo sub will certainly drop lower than cubo 18 or cubo 18 extended. Bit bigger and heavier but will still go upstairs and round corners with two+ people. I have four and I rarely get to use all of them as they can do damage loaded with 18nlw9000
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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It's a common misconception that the Cubo Extended main feature is to
give extra low end extension of some sort. Although Extended might give a few
Hz more low end extension for some drivers, the overall averaged SPL remains the
same. Cubo Standard has the largest rear chamber, with the shortest horn path length. Cubo Extended trades some of that rear chamber volume for extra horn length. The extra horn length tunes the Cubo lower but then again, the loss of rear chamber volume increases the tuning. So the overall tuning doesn't really change, what changes is the flatness of the frequency response. Which one is best for you depends on the drivers used. If you have drivers with a high Qts and/ or Vas, so typically (American reflex) drivers that you would use in a large (chamber) reflex cabinet, Cubo Standard suits your driver best. If you have (European reflex) drivers that you would use in a medium sized reflex or some sort of horn, Cubo Extended is the best option. As a rule of thumb, if: Qts x Vas = 100 - 120, Cubo Extended or StandardQts x Vas > 120, Cubo Standard Qts x Vas < 100, Cubo Extended Only for Cubo 15: Best regards Johan |
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Cheekybox
Registered User Joined: 04 October 2014 Location: Smoke Status: Offline Points: 104 |
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Thanks for the responses, all. Really appreciate it.
I haven't seen the cubo sub in action. It's definitely a box i'd be interested in, but, the thing is, i've got 2 cubo18 and so it feels appropriate to continue with this box if i want 4, rather than starting over. I'm using PD 1852 drivers at the moment. I dont know if this is a best driver for the box though. THey came with the boxes which we acquired second hand. Looking at 1852 specs: QTS 0.33 x VAS 120.38 = 39.7254 So that means these drivers suit the extended version best. Have i got that right? |
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