.jpg)
Frequency: From 40 Hz up to 110 Hz
Enclosure Type: Hybrid
Size: 62x62x62cm
Recommended Driver: 
Kappalite-3015lf (668.37 kB), Kappapro-15lf-2 (534.42 kB) and kappa-15lf (566.56 kB), drivers with EBP of 100 or higher; Fs (27-45 Hz), Qts (0.26 - 0.38), Vas (150 - 300 L) / (7.4 - 11.1 ft^3). Where EBP = Fs / Qts
Cubo 15": Cubo is a multi purpose, stand alone bass bin that will equal or out run a single 18" BR*, of similar size, from ~ 40 Hz and up in terms of sensitivity. Utilising a non-expensive driver such as the Eminence 3015LF, Kappa 15LF and Kappa 15LF Pro** and a cut list from a single 18 mm*** sheet (244 x 122 cm) / (8' x 4') with a single angled cut, Cubo 15" realises a cost effective, small and light weight enclosure following the KISS-principle.
Development: In 2007 the first prototype was build and tested. Cubo 15" is the 4th prototype in a line of hybrides aiming at the achievements as stated above. The measurement below shows the gain over the stated basreflex (see * for details) . New measurements will follow on this page.
Footnotes:* 18Sound 18LW1400 in a 175 liter basreflex 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 (27-45 Hz), Qts (0.26 - 0.38), 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
This email address is being protected from spambots. You need JavaScript enabled to view it.
*** If you want to use 15 mm material use 11-ply Baltic birch, nothing less. Plans available on request.
Cubo 15 plans are also available in an Imperial version, plan available on request.
Designer: Cubo15 [view profile]
Plan:
Cutsheet (clearly visible after download):
Discuss this article
You need to
log in or
register to participate in this discussion.
MDF should be fine, but paint the crap out of it and maybe don't stand on it, as the joints will be a little weaker. Don't get it wet. Should be fine. Having built with both MDF and Birch, I would spend the extra for the Birch for the added longevity of the box and the slightly less carcinogenic sawdust.
Mostly more as it is almost exactly 19mm
which is a very common thickness for MDF.
But 19mm should be fine. 18mm ply easily becomes 19mm in damp conditions anyway.
3/4" is more or less 18mm
Has anyone made this using 3/4 MDF? I know that MDF is not optimal but this is going to be my first build so I am looking for a cheap way to learn from my mistakes.
The real question is how much is the change from 18mm to 3/4 inch going to complicate the build? I have read this whole thread but didn't find anything along the lines of imperial based cut sheets.
A few days ago I tried sending an email to the email listed on the plan page. It came back with an error, noticed a typo in the address on the site. But have not heard back yet
Cubo, If you could send me the imperial measurements that would be great
This email address is being protected from spambots. You need JavaScript enabled to view it.
Anyone do a build with 3/4in? What problems did you run into???
The Kappa 15LFA has a proven track record in this cab and I have a pair of Cubo's with them loaded and they are great, I've been using them for 4 years or so and they are still working well. I have also built 2 cabs with Delta Pro 18A's but, the best cabs I have are a pair of Cubo's with the PDN15.SB40's and these are outstanding. Unfortunately, I can't get hold of these drivers at the minute due to the current price of Neo magnets. Precision Devices are reluctant to produce them in small numbers? I would have built another six cabs by now? Thanks again Mr Cubo for one of the best designs in years. Cheers Cozy
I'm going to build two Cubo15's during the next month. The primary use for them, will be to play all genres of music outdoors.
I would side with bgrade on this one. The theoretical advantage of double the Xmax is 6 dB more output from the same enclosure. As the 15LF will handle 500 - 600 Watt mechanically, the 15C will run out of steam, well before that.
He says that it is more important for a sub, that xlim is higher and fs lower on the Kappa 15C, than it is on the Kappa 15LFA
The difference in Xlim in this case is to small to give a noticeable difference and could be considered a second priority (it's the equivalent of how fast you could drive a car before it brakes down permanently). The first priority is to have a sufficient Xmax (which is the equivalent of how fast you could drive a car continously for many years).
The Fs in this case (hybride tapped horn), is not as important as in traditional design. In fact it could be a litlle bit higher and still offer the same lower cut off (35 - 40 Hz).
You can download the plans from the download section
Personally I ussually download them from the plan section, right click, save as (tho that has been a while ).
Best regards
Cubo
mikenice wrote:
Hello Im loving the design of this sub. I was wondering if i could have a copy of the design.
You can download the plans from the
download section.
Hello Im loving the design of this sub. I was wondering if i could have a copy of the design.
bgrade wrote:
I think the Kappa 15 LFA would be better, if you have to go American series Eminence, as it is meant for sub duty, but it is 8 ohms. The Kappa 15C only has 2.4 MM Xmax, so I don't think you could push very hard before problems occur.
Not trying to speak for Cubo though. He will have better advice, I imagine.
All advice is appreciated.
I have been told by my audio-guru, that it is not a problem. He says that it is more important for a sub, that xlim is higher and fs lower on the Kappa 15C, than it is on the Kappa 15LFA.
I think the Kappa 15 LFA would be better, if you have to go American series Eminence, as it is meant for sub duty, but it is 8 ohms. The Kappa 15C only has 2.4 MM Xmax, so I don't think you could push very hard before problems occur.
Not trying to speak for Cubo though. He will have better advice, I imagine.
