Cubo Kick is a midbass bin to enforce the Cubo series or any other sub bass cabinet in the kick bass region. Like all Cubo models, Cubo Kick is designed to offer maximum performance when used in a stand-alone operation.

Cubo Kick 15 is the largest at 62 x 62 x 62 cm (H x W x D), aimed at 80 - 200 Hz, it has the most output in the 120 Hz area, for that well known "pressure on the chest kinda feeling". Not only do the frontal dimensions match with Cubo 15, 18, 21 and Sub, but the output is also high enough to use Cubo Kick in a 1:2 ratio (1.5:1 for live music). On top of two Cubo 15's it will raise the minimal height for the high mid top to 180 - 190 cm, bringing it well above the crowd ears. The cut sheet fits from a single sheet of 122 x 244 cm, 18 mm 13-ply Baltic birch is preferred. Originally designed around the 18Sound 15ND930. Other drivers that will work:

- Eminence Kappa Pro 15
- Faital Pro 15FH520
- Faital Pro 15FH500

The width of the cabinet can easily be modified, Cubo Kick 15 at 45 cm wide is best used in combination with 12" drivers to get the middle way, 100 - 220 Hz when used stand alone.

Cubo Kick 12 is the smallest cabinet at 45 x 45 x 50 cm (H x W x D). Initial measurements show it's capable of 110 - 250 Hz stand alone, a bit below 100 Hz when stacked in multiples. With the same frontal dimensions as Cubo 12, the output is high enough to use Cubo Kick in an 1:2 ratio (1.5:1 for live music). The cut sheet fits easily from a single sheet of 122 x 244 cm, 15 mm 11-ply Baltic birch is preferred. Designed around the 18Sound 12ND830. Other drivers that will work:

- Faital Pro 12FH520
- Faital Pro 12FH500


Over 10 prototypes were built to ensure a maximum output and clarity, in a minimum sized enclosure. Cubo Kick works with a wide variety of drivers, some of which are listed above, if unsure if your driver works, send me an e-mail at questionsaboutcubo at gmail dot com. Or visit the forum: Forum Topic Cubo Kick

It's advisable to use dampening material on all the walls in the rear chamber, except the baffle and without restricting air flow to the driver and reflex ports.

Plans Cubo Kick 15:

Size: 62x62x62cm    
Frequency: 80 Hz - 200 Hz    
Enclosure Type: Port Assisted Front Loaded Horn
Cubo Kick Render 2
Cubo KIck Render 3
Cubo KIck 15 Cut Sheet

Plans Cubo Kick 12:

Size: 45x45x50cm    
Frequency: 110 Hz - 250 Hz    
Enclosure Type: Port Assisted Front Loaded Horn
Cubo Kick 12 Render

Plans Cubo Kick 18:

Size: 62x62x65cm    
Frequency: 75 Hz - 190 Hz    
Enclosure Type: Port Assisted Front Loaded Horn
Cubo Kick 18 has been designed on request and is basically a Cubo Kick 15 redesigned to suit an 18" driver, giving it the exact same outer dimensions as Cubo 18. The increased rear chamber gives it a slightly lower tuning and the slightly longer horn makes it perhaps "the most 120 Hz" design out there.


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Cubo15 replied the topic:
7 months 1 week ago
If you need just one dimension altered, the width is by far the easiest (just reduce it). All coupling options you mentioned will give small deviations, 0.75 dB less here, +1.1 dB there, etc. It's nothing to loose sleep over, just experiment till you find something that is to your liking ;)
terrellhicks85 replied the topic:
7 months 3 weeks ago
if i need to resize these with either width or height to 22 7/8", how do they best couple? port to port? horn to horn? or vertical? or does it matter? ill be using some black widow kadt 1s that i already have and theyll be crossed from 100 to 2-300 between my subs and tops. thank you. 
Cubo15 replied the topic:
8 months 4 weeks ago
The Celestion 15-FTR4080F is a good choice for 45 cm width.The lower limit of Cubo Kick at 45 cm wide raises to 90 Hz, the upper limit is usually extended up to 220 Hz. So a little bit less low end and a bit more top end in return.

If you cross the fbt at 100 Hz, that means you also cross the kick at 100 Hz. For the best result experiment with the crossover frequnecy till it sounds right, typically between 80 - 100 Hz. The blow to the chest is indeed centered around 120 Hz.

Celestion doesn't have a picture with dimensions for the 15-FTR, so it's difficult to predict but usually the magnet doesn't touch the rear panel. If it does let me know by then as the problem is easily solved.
.giuseppe . replied the topic:
9 months 6 days ago
as a woofer I had read that .....celestion FTR4080F 8 OHMit is OK
 (Do you recommend a woofer, which fits into the speaker without creating problems of modifying the enclosure, which does not hit its magnet on the frame when closed, perhaps without spending a lot of money) I read that I should feel the blow to the chest from 120 Hz in then, right? so if fbt I put it at 100hz at how many hz should I put the football cube? What are the advantages at 45cm, and what disadvantages do I have at 45cm?can I add handles?, what if I want to add a built-in amplifier?
Cubo15 replied the topic:
9 months 6 days ago

is the the box Speaker 15LB100-8W from Thomann useable for this enclosure?

The 15LB100 is a good all round driver, it's geared a bit more towards bass than kick but they'll work in both Cubo 15 and Cubo Kick 15. In the latter for 80 - 200 Hz.

I would like to make a 15 cm football cube, I wanted to ask if it is possible to do the width of the cube is 45 cm.

Hi Giuseppe,

Yes, you can make Cubo Kick 45 cm wide, leave the height, depth and everything else the same. I would cross it around 100 Hz to the fbt 115SA. Do you know what loudspeaker you want to use in Cubo Kick?

Best regards Cubo
.giuseppe . replied the topic:
9 months 1 week ago
  hi cube, thank you very much for the excellent work you do, I am Italian and while searching in the various forums I found your projects and read many of your topics, I would like to make a 15 cm football cube, I wanted to ask if it is possible to do the width of the cube is 45 cm. (if I make it 45 cm wide do I have to change anything else? height, depth? ) thanks for everything, please, I'm ignorant on the subject so explain to me well I USE so well I USE so many technical terms, I have to combine it with a ''M SO CONFUSED
DevFelix replied the topic:
9 months 1 week ago
Hello Mr. Cubo,
is the the box Speaker 15LB100-8W from Thomann useable for this enclosure?

Damianvick replied the topic:
1 year 1 month ago
You're a legend Cubo, thanks for your time and expertise!

After seeing your reply, I bought and fitted up the 18sound drivers this morning as I managed to pick them up for $500aud (vs $700+ to have the 2226's re-coned)... and with a party in 2 weeks I was keen to get them online.

They don't disappoint!
Cubo15 replied the topic:
1 year 1 month ago
The benefit of refurbishing the 2226's is that you know what they sound like, the 15LW1200 is different as it's more of a horn oriented driver. It might drop a dB below 100 Hz but loads the horn better. As it's a high BL horn driver it can sound a bit more aggressive but as Cubo Kick is a bit more horn than reflex it's a good choice.

Great picture, goes in the yearbook!
Damianvick replied the topic:
1 year 1 month ago
Hello Mr. Cubo, 

Firstly, I want to thank you for your work and your commitment to helping all of us build our own rigs!

I built a couple of cubo kicks a year or two ago for obvious reasons (more kick!)... and they look so good, I modelled the rest of the rig's grills to match. 

I live in Australia where the choice of drivers is limited and expensive, but ended up acquiring a pair of second hand JBL 2226's. While they have some effect, they're clearly worn out and are not doing the cabinet justice.

I am faced with the choice of re-coning them, or replacing them. To that end, I have found someone local selling a pair of 18sound 15w1200's in good condition (specs are attached). 

Would these be suitable for cubo kicks, or am i better off having the 2226's refurbished?

Thanks in advance.
Cubo15 replied the topic:
1 year 6 months ago
Thanks man, appreciate it.
lechris replied the topic:
1 year 6 months ago
In 2020 I've built two Cubo Kick 15 based on 18Sound 15ND930 for a venue in Leipzig.

Now that we have events again I can say that I am very happy with these speakers and I would say the build was a success.

During this build, I recreated the drawing by Cubo in Librecad to figure out some dimensions I could not discern from the drawing and to decide on details like where to put terminal plates and mounting holes for the speaker or the rear wall.

Maybe this can also be helpful for some other people who are building Cubo Kick 15, so I decided to share these drawings.

The proposed locations dimensions should provide clearance for Adam Hall 87160 Terminal plates and 18 Sound 15ND930. For other drivers/terminal plates, your mileage may vary.
Cubo15 replied the topic:
1 year 7 months ago
The Celestion FTR15-4080FD is an allround driver, whether it's bass, mid or kick, it should feel right at home.
jsoto replied the topic:
1 year 7 months ago
Hi Cubo! Wonderful design! How would the Celestion FTR15-4080FD work in the Cubo Kick?

Resonant frequency     fS     35.4 Hz
Electrical Q     QES     0.30     
Mechanical Q     QMS     3.91     
Total Q factor     QTS     0.28     
Suspension equivalent air volume     VAS     164.3 litres
DC resistance     RE     5.6 Ω
Voice coil inductance     LE     1.38 mH
Force factor     B·l     23.05 T·m
Suspension mechanical resistance     RMS     7.24 N·s/m
Suspension mechanical compliance     CMS     160 µm/N
Moving mass     MMD     112.24 g
Moving mass (including airload)     MMS     127.19 g
Surface of the diaphragm     SD     850.9 cm²
Effective diaphragm diameter     Ø     33 cm
Maximum linear excursion     Xmax     ± 6 mm
Displacement volume at Xmax     VD     510.5 cm³
Efficiency     η₀     2.37 %
Efficiency bandwidth product     EBP     118    
Cubo15 replied the topic:
2 years 4 days ago
Those are oki for sure,

The RCF MB15N351 has been optimized for mid-kick, the only draw back might be the light-ish cone, I would put a lot of dampening material on the walls of the rear chamber (just in case).

modalen replied the topic:
2 years 1 week ago
I have a few RCF MB15N351.
Would they be oki for Cubo kick?
Resonant frequency fS 42 Hz
Electrical Q QES 0.24
Mechanical Q QMS 4.00
Total Q factor QTS 0.22
Suspension equivalent air volume VAS 191 litres
DC resistance RE 5.6 Ω
Minimum impedance Zmin 6.0 Ω
Voice coil inductance LE 1.65 mH
Force factor B·l 22.5 T·m
Suspension mechanical resistance RMS 5.3 N·s/m
Suspension mechanical compliance CMS 166 µm/N
Moving mass MMD 61.4 g
Moving mass (including airload) MMS 80 g
Surface of the diaphragm SD 900 cm²
Effective diaphragm diameter Ø 33 cm
Maximum linear excursion Xmax ± 6 mm
Excursion limit Xlim ± 19.5 mm
Displacement volume at Xmax VD 540 cm³
Efficiency η₀ 5.68 %
Efficiency bandwidth product EBP 175
Cubo15 replied the topic:
2 years 3 weeks ago
I would go with the 12-300 for both Cubo 12 and Cubo Kick 12 (higher efficiency/ lower Qts works well in both designs).

smegdubz replied the topic:
2 years 4 weeks ago
Hello there, would Fane Sovereign 12-300 work in Cubo Kick 12? Or other from Fane product range. Looking to use 12-300 in cubo 12's and want to build kicks as well, sticking with the same manufacturer. Not sure what parameters are crucial in kick design. thanks!
Cubo15 replied the topic:
2 years 5 months ago
OK, that's a better choice. Let's not pin it down on one parameter though, like Xmax, although an u0 over 3 % is a good indicator for a 12" or 15" kick driver.

Best regards Cubo
mikael.haggman replied the topic:
2 years 5 months ago
Thanks for your reply. But it seems I copied the wrong parameters (sorry for that). They were for the 15-4 S. The right theile below. That might work better with the lower Xmax? The plan is to use this Kick as a low mid driver in combination with a Cubo 18 and a mid/HF cabinett on each side ran on Lab 4000, Lab 2000c and Lab 1300c.

Qms 11,81
Qes 0,31
Qts 0,31
Fs 48,60 Hz
Re 6,06 Ohm
Mms 107,00 g
Cms 0,19 mm/N
Bl 25,09 T*m
Sd 830,00 cm2
Vas 96,87 liter
u0 3,41 %
XMax 8 mm
Le 0,71 mH
Rms 2,77 Kg/s
Efficiency Bandwidth 154,52
Cubo15 replied the topic:
2 years 5 months ago
The Ciare 15 ndh driver will work but it's more of a bass/ sub driver, due to it's motor topology (30 mm winding depth) it's designed to have optimal cooling at large excursions. Typical excursion in Cubo Kick is 3 - 5 mm. At low to medium power levels it will be OK (500 - 700 W), well away from clipping, at high power levels (> 700 W) it might burn the ends of the voice coil, as they will never get close enough to the magnetic gap to properly cool (due to a lack of excursion). It's a perfect high power driver for Cubo 15 Extended though.
mikael.haggman replied the topic:
2 years 5 months ago
Do you think this cabinet will work with a Ciare 15 ndh driver. See specs below:

Qms 11.19
Qes 0.26
Qts 0.25
Fs 27.90 Hz
Re 6.04 Ohm
Mms 143.00 g
Cms 0.23 mm/N
Bl 24.19 T*m
Sd 830.00 cm2
Vas 219.93 liter
u0 1.78 %
XMax 11.5 mm
Le 1.07 mH
Rms 2.24 Kg/s
Efficiency Bandwidth 107.83
Cubo15 replied the topic:
2 years 6 months ago
Personally I like drivers like the 18Sound 18W2000, typically low Qes (0.2 - 0.3), low to medium medium Vas (say below 250 liter), medium Xmax (you don't need a lot) and preferably a low Le. These kind of drivers tend to have an n0 (Eta zero) around 3% or higher and an EBP above 100.

Faital Pro exaggerates the Xmax figures a bit, otherwise I would say Xmax below 9 mm, higher is usually a sign that it's more a sub driver.
Stefist replied the topic:
2 years 6 months ago
Hello !

Any Idea for a 18" speaker that could fit in the cubo kick 18 ??

Cubo15 replied the topic:
2 years 7 months ago
I think the easiest way is to find a Sketchup model, or put in the parameters in Sketchup (2D) in Metric (centimeters), then change to Imperial (Window - Model Info - Units - Decimal/ Fractional).