Cubo 15
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Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=35641
Printed Date: 16 April 2024 at 8:10am
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Cubo 15
Posted By: GekoMusic94
Subject: Cubo 15
Date Posted: 07 February 2010 at 10:57am
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What do you think about this? http://www.freespeakerplans.com/cubo-15q.html - http://www.freespeakerplans.com/cubo-15q.html Is better than the MTH-30( http://www.freespeakerplans.com/mth-30.html - http://www.freespeakerplans.com/mth-30.html )? I'm very interested to build one of these... Thanks Giacomo |
Replies:
Posted By: _djk_
Date Posted: 08 February 2010 at 1:52am
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I think you will find that the TH design will be smoother, and have more low frequency output. The TH design is easier to build as there are no angles that have to be cut (the woofer mounting board angle may be cut down with a file if need be, after it is assembled). ------------- djk |
Posted By: _djk_
Date Posted: 08 February 2010 at 1:56am
/watch?v=QxwcTtgJrME">A single 18" (EV design): vs a single 12:  ------------- djk |
Posted By: bitzo
Date Posted: 08 February 2010 at 8:03am
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more than 6 meters of excursion at 50 hz?
------------- http://www.unitedroots.it - United Roots SoundSystem site |
Posted By: Centauri
Date Posted: 08 February 2010 at 8:09am
Would make fitting a grille a bit difficult ... 
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Posted By: mobiele eenheid
Date Posted: 08 February 2010 at 12:10pm
These are both designs according to Hornresp (both excursion limited): http://www.hardware-test.de/hornresp/30%20vs%2015.PNG -
By the way: You're comparing an 18" EV (T18 perhaps?), quite different from the Cubo15 as shown, with a 12" tapped horn with a completly different frequency response then the MTH-30, because?!
I've simulated both enclosures at work yesterday with different drivers and came to the following conclusion:
- The MTH-30 is very well designed cabinet/driver combo, that will give the most output vs volume/weight. It has, besides the recommended 12SB30 (excellent choice btw), very little drivers to work with. It has a total volume of 132 liters. - The Cubo15 has similar sensitvity as the MTH-30 according to Hornresp. With the 3015LF it will have about 3-3,5 dB more output (again excursion based). Apart from that it will work with a large variety of drivers. It has a total volume of 238 liters. So, if your going for the MTH-30 use the recommended driver. At 264 liter for a double (two drivers) it will outperform the Cubo15 no matter what driver it uses. If you were to use a single vs. a single, my bet would be to use the Cubo15 with the 3015LF. Best regards Johan |
I think you will find that the TH design will be smoother, and have more low frequency outputPosted By: FlipC
Date Posted: 08 February 2010 at 9:00pm
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http://worldconspiracy.org/speakers/Beyma-TH Works with quite a few drivers. I used the B&C 12PS100. Also this layout can be reduce another 10 Lt without hurting output really. So you can have a cabinet that measures 15x24x22.5 OR less that outputs 126 DB from 50-200 Hz. With 40-44Hz cut off. For size the only things I have come across to match a TH is a Hybrid ported FLH's. |
Posted By: GekoMusic94
Date Posted: 09 February 2010 at 1:08pm
Ok, Thanks !!!Now i have another question: For my tops ( http://www.youtube.com/watch?v=HmzyNi2a3f8 - http://www.youtube.com/watch?v=HmzyNi2a3f8 ) and for Drum N Bass music is better the Cubo 15 or the LMB-115 ( http://www.jobst-audio.de/index2.html - http://www.jobst-audio.de/index2.html )? Thanks... P.S.: Sorry for the continous question but i'm very undecided  ... |
Posted By: COZY PILLOW
Date Posted: 18 February 2010 at 7:23pm
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Is the Cubo 15 a good cab or not? would it be a good stand alone cab for small gigs for live music? would it give a good freq response and reasonable SPL compared to a single HD15? Cheers,
------------- COZY |
Posted By: mobiele eenheid
Date Posted: 19 February 2010 at 10:34am
Cubo 15 will have higher sensitivity, produce a higher maximum output whilst producing the same low frequency response but imho these kind of cabinets are best crossed low (80 Hz -100 Hz).
Best regards Johan
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Posted By: COZY PILLOW
Date Posted: 19 February 2010 at 5:07pm
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Thanks for that I was looking for a sub that would cross around those frequencies anyway as I will be using full range tops anyway for small gigs. I beleive that a single HD15 would not go that low? and is not that suitable for stand alone? Could you please post the pics of the 15mm plans too. I tried to PM you the other day for these? Thanks, ------------- COZY |
Posted By: COZY PILLOW
Date Posted: 24 February 2010 at 1:29pm
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Hi Johan, Have you had a chance to sim the PD186 in the Cubo 18 or would you still recommend the Delta pro 18a. Regards, C.P. ------------- COZY |
Posted By: Robbo
Date Posted: 24 February 2010 at 3:18pm
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As usual, there is a screw up on the width of the cabinet yet again----Why can't anyone put a little thought into designing cabinets that are 580 mm wide like all the major names that make touring class cabinets do.
You can fit three 580 mm wide cabinets across most panel vans and they also pack so much better into larger trucks as well-----As soon as you design a cabinet that is 600 mm to 620 mm wide then you can only fit two of them across the width of your van---Lets face it, most cabinet designs that hold 12", !5", !8", and 21" drivers do not need to be wider than 580 mm---Just put a bit more thought into design as you can usually make size adjustments elsewhere in order to accomodate the 580 mm standard width.
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Posted By: COZY PILLOW
Date Posted: 24 February 2010 at 3:40pm
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on that thought if the cabinets were 580mm wide would the length or height be increased to compensate and which L or H would be the best way to achieve the same characteristics of the original sizes without affecting the response & tunning etc? ------------- COZY |
Posted By: mobiele eenheid
Date Posted: 24 February 2010 at 6:35pm
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There are very few 15" and 18" bass drivers that Cubo will not work with. according to simulations What driver to use would depend on availability and how much power is available. The Delta Pro 18 would be my personal choice if I had an amplifier between 500 and 900 W per cabinet. The PD 186 if I had an amp between 700 and 1250 W(+) per cabinet.
Best regards Johan
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Posted By: COZY PILLOW
Date Posted: 25 February 2010 at 9:26am
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Thanks Johan. The amps are not an issue. I believe the Pd186 is a very good driver.
Regarding the dimensions. Could the actual height of the cabinet be 58cm so that it could be packed on it's side and the length and width could be 64.1 x 64.1. would this change the cab too much and cause problems with the sound and performance? or did you consider these points when you designed this cab?
I'm guessing the height would be a possible problem because of the postion of the driver there may not be enough room to fit driver in?
Kindest Regards,
------------- COZY |
Posted By: mobiele eenheid
Date Posted: 27 February 2010 at 2:52pm
Regards Johan |
Posted By: GekoMusic94
Date Posted: 27 February 2010 at 6:42pm
Thanks mobiele !!!
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Posted By: Drapetsoniths
Date Posted: 23 March 2010 at 7:09pm
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Hi johan, You mentioned using 18 inch drivers in the cubo and thats what is refered in fsp forum.
(although the designer has mentioned adding 3 cm depth to fit driver)
How do you expect the cubo 15 to work in terms of sensitivity and max spl
with b&c 18ps100?(or another decent 18 inch driver)
Do you think it would still get beaten by 2 mth-30 's?
one 18 vs 2 12s at about the same volume....
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Posted By: bitzo
Date Posted: 24 March 2010 at 2:22pm
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better in what terms?
------------- http://www.unitedroots.it - United Roots SoundSystem site |
Posted By: Drapetsoniths
Date Posted: 24 March 2010 at 3:06pm
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Were you refering to me? I didnt understand the question..
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Posted By: bitzo
Date Posted: 24 March 2010 at 3:44pm
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yup...I mean what is better for what? I mean spl, velocity, portability, diy friendly, sound colouration, etc...etc... ------------- http://www.unitedroots.it - United Roots SoundSystem site |
Posted By: Drapetsoniths
Date Posted: 24 March 2010 at 4:19pm
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Do you mean this question?It is clearly stated
If you mean this one:
the same terms apply
sensitivity and max spl are the issue (not ultra low extension<45hz)
I think the twelves win on portability but kind of lose at price(important) and lf(not very important).
Both designs seem very diy friendly
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Posted By: mobiele eenheid
Date Posted: 24 March 2010 at 11:58pm
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It is always hard to compare a design with an other if you haven't heard both, especially if one is your own, even though I like to think I'm quite neutral. For that reason I'll show the Hornresp sim of a MTH-30 in 1,0 pi vs. Cubo 18 (Extended) in 2,0 pi. After that some talk will follow why you should choose Cubo anyway ;)
Both SPL's are based upon a voltage input, where the cone excursion around 65-67 Hz reaches Xmax (both calculated the same way). The MTH-30 with PD 12SB30 and Cubo 18 with the B&C 18PS100.
http://img85.imageshack.us/i/mth3010pivscubo1820pi.jpg/ - http://img85.imageshack.us/i/mth3010pivscubo1820pi.jpg/
As you can see 2 x the MTH-30 gives the best "bang for cabinet volume". Using an other B&C driver (the 18NW100) would tip the scale in favour of Cubo 18, looking virtually identical to this one:
http://img94.imageshack.us/i/mth3010pivscubo18lw2400.jpg/ - http://img94.imageshack.us/i/mth3010pivscubo18lw2400.jpg/
This last one is Cubo 18 loaded with the 18Sound 18LW2400, their newest ferrite driver. When you figure in power compression (which both B&C and PD do not state) I suspect the scale will be slightly tipped in the favour of the MTH-30 once again, as 2 x 3" VC are likely to have lower power compression then a single 4" VC. However that's why I display the 18LW2400 as it's possibly keeping it's advantage even when corrected for power compression (it's that low).
It should be noted that all my measurements showed that Cubo 15 and 18 drop ~10 Hz lower then HR predicts. As such I would aspect it to have higher SPLmax between 40 and 50 Hz then the MTH-30 (unless that one drops lower as well of course).
Best regards Johan
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Posted By: mrchay
Date Posted: 25 March 2010 at 11:53am
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Hi, Im going to be building 2 Cubo15's which I will load with fane 15-400LF drivers. I hope to have them finished before too long since its such an easy build. Im choosing the design because it is so simple, and seems to sim well with a large range of drivers. Also its a good compact size. When I have built the two of them, I will be happy for someone on the forum who is more experienced than me to have a listen or a measure of them even, so that people can be better informed whether the design is good or not. I may have built some tapped horns for comparison by that time as well. If it does work out well, it could be a really good DIY all-in-one bass box (simple to build, can be loaded with cheap drivers which can later be upgraded). I going to build it 18mm CHEAP ply or MDF, biscuit joined glued and screwed - I've got high hopes for this one. |
Posted By: toiminto
Date Posted: 18 May 2010 at 9:40am
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Hello, I have two kappalite 3015 lf:s and I'm trying to decide what cabinet I should build for them. Is there any real world measurements from cubo15 extended version? Does it drop to 40hz? Now I have them in demo cabs, ~190 liter reflex tuned to around 40hz. Works like a charm but for the final cabs I'm pondering between a tapped horn, cubo15 (or similar bph/hybrid) and a ported cab. Might also consider a bandpass. I'm going after 40-120hz area with the cab, can be around 200-250l internal max. Any suggestions ? ------------- http://soundcloud.com/toiminto |
Posted By: COZY PILLOW
Date Posted: 18 May 2010 at 12:15pm
The Cubo's are a superb cab they do go really low. They are that good that I have to turn the amp down a good bit compared to my old reflex cabs. I have just finished a pair of extended 15's and they are outstanding. I have used a pair of kappa lfa's and they really perform very well. I will post some pics soon. ------------- COZY |
Posted By: toiminto
Date Posted: 18 May 2010 at 12:36pm
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If it goes as low as in a reflex cab, then cubo15 would definetly be on my list! ------------- http://soundcloud.com/toiminto |
Posted By: COZY PILLOW
Date Posted: 18 May 2010 at 12:43pm
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I think it goes down to 30hz but I am not sure. Mobiele will keep you right he designed this cab. It was me who built the 18's and the pics are on FSP. I built them for my friend who used a pair of Delta Pro 18a's and they are superb too. ------------- COZY |
Posted By: mobiele eenheid
Date Posted: 19 May 2010 at 11:13pm
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Hello,
Cubo 15 was designed as a 40 Hz plus cabinet (in singles) and performs as such. For a solid 30 Hz an 18" reflex will do a better job in an cabinet of about equal size but Cubo 15 will have higher sensitivty from ~40 Hz and up (from 50 Hz and up this is ussually quite noticeable).
Cubo 15 could be used with an horn extension to make it drop lower notes as well. For 30 Hz this extension would be 45 - 60 cm. Also as Cubo 12 nears completion, I will build a 30 Hz version of Cubo 15/18. This design is however 1.46 times larger as Cubo 15 (1.39 for Cubo 18).
There are measurements of Cubo 15 Extended, however those results are not in publishable form (yet). The most prominent difference with Cubo 15 Standard (which measurements are published), is that the reponse is flatter for most drivers, included the 3015LF.
Best regards Johan
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Posted By: mobiele eenheid
Date Posted: 20 May 2010 at 11:18pm
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I just realised that V-plating 4 cabinets (2 wide, 2 high) will give close to 30 Hz performance. It would extend the horn path by 44 cm and enlarge the horn mouth up till 2720 cm^2 per cabinet. The Cubo's would have to placed with the mouths together. For 30 Hz performance, this way, I would recommend to use a 15" with a (stated) Xmax of around 9 mm or use Cubo 18 with a sufficient Xmax driver..
Best regards Johan
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Posted By: MarjanM
Date Posted: 06 November 2010 at 11:12pm
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In a few days i will have 18NLW9000 here. I would like to try it in Cubo18. Where can i see the plan Johan? Has Anyone tried 6 Cubo15's in one stack? I have 12 KappaPro15LF that i want to find a new home for? ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: mobiele eenheid
Date Posted: 07 November 2010 at 5:58pm
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Lucky you, having tested some of his brothers, it appears to be an excellent driver too. Hope you have some power to spare though. The Cubo 18 plan can be found here: http://www.freespeakerplans.com/cubo-18.html - http://www.freespeakerplans.com/cubo-18.html
I have not seen more then 4 Cubo's in a stack up till now. You still could be the first
Having 12 drivers makes a lot of designs interesting imho, assuming they're going to be stacked. In a stack of 12 even the HD15 would probably go low enough for average usage. I do not like to push my own design to much Build Cubo 15 Extended though I think it would be a nice choice.
Best regards Johan
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Posted By: MarjanM
Date Posted: 07 November 2010 at 9:21pm
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Thank you Johan.I also have 12 18Sound 18LW800 :-) So lot of Cubos at the end if testing goes well. Do you think performance will improve it the box is a bit deeper then it is now. To extend it to 70cm? Or to make it a bit higher and make the extended part a bit longer towards the front of the box? I hope you understand what i am saying. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: mobiele eenheid
Date Posted: 07 November 2010 at 11:10pm
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Increasing the depth from 65 cm upto 70 cm will increase the internal volume by 17 liters. I think that both the increase in either percieved depth or output would be minimal.
To extend the horn path even further would yield neither an improved response for the speakers mentioned (all three).
I can send you a PM on tuesday for something that will?
Best regards Johan
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Posted By: MarjanM
Date Posted: 07 November 2010 at 11:13pm
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Cool :-) And thank you for the info. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: jamwa
Date Posted: 23 November 2010 at 11:00am
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okay re opening the debate.
Cubo 15 against the matinsson Tapped 15... ------------- Sound, Light, Projection, Display, Cameras and production support |
Posted By: mobiele eenheid
Date Posted: 24 November 2010 at 4:38pm
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As previously covered a driver in Cubo 15 can be mounted with the driver in the horn or in the chamber. The Martinsson THAM 15 knows but one configuration.
With the magnet in the horn; Cubo 15 will be louder between 45 - 65 Hz up to 2,5 dB, also more output above 90-100 Hz, about equal inbetween. The THAM 15 has more output below 40 - 45 Hz and seems suitable for a 30 Hz lowcut (for Cubo 15, 40 Hz is advised).
With the magnet in the chamber: Cubo 15 will be up to 4,5 dB louder between 45 - 65 Hz and overall 1,5 dB louder. The THAM 15 has more output below 45 -50 Hz. Up to 6 dB @ 30 Hz. For equal power input the THAM 15 will have >20% excursion above 45 Hz.
The Martinsson THAM 15 is a nice design and unlike Cubo 15 a true tapped horn. Looking at it from the perpective that the Cubo designs are a hybrid of reflex and tapped horn, one would suspect Cubo to work best with drivers ranging from typical reflex driver towards medium Qts/medium Vas horn drivers. The Martinsson is more suited for use with low Vas (<125 Liter), low Qts (0.24)drivers such as the 15TBX100.
Best regards
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Posted By: djeddie
Date Posted: 24 November 2010 at 7:21pm
Seeing that info, is it worth building one of each (for each side, in other words four cabs in all)? ------------- Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB |
Posted By: martinsson
Date Posted: 25 November 2010 at 7:03am
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Please note that the differance in size between them, the external dimensions shows that cubo15's 62x62x62 equals 238 liters and the tham15's 50x55x68 is 187 liters.
In comparison a rather standard 215 br should amount to roughly 250 liters, and looking at the preformance/size ratio there should not be a totaly given outcome if compared with eather of the designproposals above.
If size is not an issue, but the driver cost is, then it seems that the cubo15 would take the lead, seeing as the 15tbx100 driver is rather costly, it should be said however that there has been sucessfull results using the tham15 with other less costly drivers from 18-sound and BMS although i have not taken part of these results myself.
The cubo15 sure is a nifty piece of work, I have never heard them myself but the responses from diy'ers out there are very positive, and rightfully so it seems when looking at the specs if this very intresting and obviously sucessful design. ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: rish
Date Posted: 25 November 2010 at 11:36am
| Hi. I have 4 beyma 15g450n. will it work well in the martinsson cab? the design looks like a very good cab. |
Posted By: mobiele eenheid
Date Posted: 25 November 2010 at 11:24pm
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Four equal cabinets look/stack nicer and one set of crossover/processor setting can be used.
Due to the lower tuning and smaller cabinet volume of the THAM 15, excursion needs are greater for a given amount of power and/or SPL (except below 40-45 Hz).
The 15g450n will work in the THAM 15. However the Xmax is on the small size.
Best regards |
Posted By: rish
Date Posted: 26 November 2010 at 8:41am
| Hi mobiele. would I rather use the beyma 15g450n in the cubo then? would it sound better in there. |
Posted By: djeddie
Date Posted: 27 November 2010 at 2:06am
Sorry, should've made it clearer! I meant one Cubo15 with the magnet on show and one Cubo15 with the cone on show either side. So four Cubo15 cabs. I did look at the Tham15 but that driver is tooooooo expensive for "just trying it to see how it sounds". ------------- Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB |
Posted By: mobiele eenheid
Date Posted: 28 November 2010 at 5:11pm
The THAM 15 is designed with 30-35 Hz and up in a relatively small package in mind. To overcome this small package, one prefers a driver with a large excursion capability. Cubo 15 is designed with 40 Hz and up in mind, as frequency rises less excursion is needed, the larger cabinet volume further decreases excursion needs.
If you're interested in the 30-35 Hz to 40-45 Hz range then the THAM 15 is an excellent choice over Cubo 15. If you're interested in more output from 40-45 Hz and up then Cubo 15 is the logical choice.
The 15g450n is a good driver with a medium Xmax. It will peform well in both designs. However according to simulation in the THAM 15 it will be excursion limited to 300 W, in Cubo 15 to 400 W. In practical terms that would suggest that it will take 450 W in the THAM 15 and 600 W in Cubo 15 (average music signal).
Regards
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Posted By: Mrd999
Date Posted: 17 August 2015 at 8:50pm
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Evening all,I currently have 2 Beyma G450n loaded Cubo 15's and love them,I am picking up another 2 this weekend and will be loading them with another 2 Beyma's. Will a stack of 4 drop a bit lower ? Have 4 PD loaded hd15's too,the hd's were a bit over powering,in honesty,but hoping with 2 more Cubo in the stack it should sound pretty balanced,have a set of Mega cabs and then a nice pair of JBL loaded,horns. What amp would folks recommend driving 4 Cubos,was thinking something putting out 6k,3k at 4r a side ------------- What goes around, comes around |
Posted By: martinsson
Date Posted: 18 August 2015 at 6:57am
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Simulated excursion has it's validity, and I have gotten numerous mails concerning the simulated xmax limitations of THAM designs, this is a concern they share with many other tapped horn designs, this appears however to be more of a theoretical concern then a practical one since I have yet to hear from a user that has experienced any limitations in SPL capacity due to design related excursion problems. Has anyone made any real world measurements or comparisons in this regard ? Volumetric efficiency (dB/m3) has it's cost, usually this cost is driver related, but I'm still a bit confused as to how much this is noticeable in real world usage, and it would be very interesting to se measurements on subject. Remember the first few words here "simulated excursion has it's validity" and far be it for me to state anything different, I'm simply just curious as to how much of a role this plays in real world usage. ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: Tonskulus
Date Posted: 28 May 2018 at 7:50am
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I recently finished one Cubo 15 extended, just to see how these performs. Driver: RCF L15P540 Ok, sound quality is pretty much ok. Not the best but not that bad either. Plays low enought for most music. Good "throw". Low pass filtering must be accurately adjusted, not too high..just barely enough to give some "kick", around 100Hz is good. Too high makes it sound honky. However, even single cubo15 gives very good SPL! Clean and tight / punchy. Good enclosure for techno / psytrance etc. L15P540 really likes tight or smallish chambers (Vas 100litres). Results was MUCH better having magnet in chamber, not in the horn mouth. Maybe I should add some more extension to see how it performs then (extra extended version). Being such a simple, easy to build from single sheet of ply, using proper driver (and crossover / eq settings!) this thing really is nice design and gives lots of fun. I'm going to build 3 more (4 total), it will be insanely loud for just 4 x 15" inches. And L15P540 is just medicore driver.. |