Saturday, July 20, 2019

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Cubo 15 is the previous generation of Cubo 18. The size of it is 62 x 62 x 62cm in height x width x depth. The frequency starts from 40 Hz to 110 Hz. What about the enclosure type of it? The enclosure type is hybrid.
Final result Cubo 15 Speaker Plan
Final result Cubo 15 Speaker Plan

The Driver For Cubo 15

The recommended driver for Cubo 15 is Kappapro-15lf-2 , Kappalite-3015lf , Kappa-15lf or driver with EBP 100 or even higher than it; Fs (27-50 Hz), Qts (0,21 - 0,41), Vas (150 - 300 L) / (7,4 - 11,1 ft^ 3). For the EB is Fs / Qts (it’s actually Fs / Qes). Here is more details about cubo 15 speaker plan design:
DesignerCubo 15
FrequencyFrom 40 Hz up to 110 Hz
Enclosure TypeHybrid
Recommended DriversKappalite-3015lf, Kappapro-15lf-2, kappa-15lf 

What Is Cubo 15?

Cubo 15 is the multifunction bass bin which can stand alone. It will be the same as Cubo 18 which comes out to run the single 18 “BR*. It has the same size. That starts from ~40 Hz or even it has high sensitivity. This speaker doesn’t benefit the expensive driver. The drivers are Kappa 15LF, Eminence 3015LF, dan Kappa 15LF Pro **. It has on sheet of ***18 mm or 244 x 122 cm or 8` x 4` cut-list with the single angled cut. You have to know that the cost of Cubo 15 is so much effective, small, and also light based on the KISS principle.

The Development Of Cubo 15

The company of Cubo made the first prototype in 2007. Besides, Cube 15 is the fourth prototype generation in hybrid line. The aim of it is to reach the goal said before in above explanation. The measurement below will show the advantage of bass reflex mentioned (Check 18Sound 18LW1400 in a 175 liter bass reflex for 37 Hz. (6,6 ft^3) to know the detail). If you are interested in it. You can choose the Cubo plan. There are much Cubo 15 plans available in imperial version which is based on the request.
Cubo 15 Speaker plan design

The Versions (The simple rule):

  • Qts x Vas > 120, Cubo Standard
  • Qts x Vas = 100 - 120, Cubo Extended or Standard
  • Qts x Vas < 100, Cubo Extended
  • Qts x Vas < 50; Cubo 15 Extra Extended

Cubo 15 will run with variety of drivers, or with EBP (more preferred) or higher; Fs (27-50 Hz), Qts (0,21 - 0,41), Vas (150 - 300 L) / ( 5.5 - 11.1 ft ^ 3). If you are not really sure with the driver, then you can send. Get If you prefer using 15 mm materials, then you can use 11- ply Birch Baltik, the plans are available based on the request.

Cubo 15 Standard Plan:
Cubo 15 standard plan
Cubo 15 standard plan

Cubo 15 box speaker standard
Cutsheet Cubo 15 speaker box standard

Cubo 15 Extended Plan:
Cubo 15 extended plan
Cubo 15 extended plan

Cubo 15 Extra Extended Plan:
Only the 2 inner horn panels are different from Cubo 15 Extended, all else equal.

Cubo 15 extra extended plan
Cubo 15 extra extended plan
Footnotes from original creators on freespeakerplans:
* 18Sound 18LW1400 in a 175 liter bass reflex tuned to 37 Hz. (6,6 ft^3) vs. Cubo 15 ; Eminence Kappa 15LF.
** Apart from these drivers Cubo will work with a wide variëty of 15" drivers preferably with an EBP of 100 or higher; Fs (27-50 Hz), Qts (0.21 - 0.41), Vas (150 - 300 L) / (5.5 - 11.1 ft^3). Where EBP = Fs / Qts.  If you're uncertain if a driver is suited, PM or mail me at
*** If you want to use 15 mm material use 11-ply Baltic birch, nothing less. Plans available on request.

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