Cubo 18

For best low end mount the magnet in the horn, for a warmer tone to the sound and a bit less low frequency, mount the magnet in the chamber.

Hello I am new here and I am interested in rebuilding the Cub18. I have a question: Does it matter whether the magnet is in the chamber or facing outwards?
Many thanks Josef.

Another question there is a wave of paraflex subwoofers around everyone going paflex from your expertise mr Cubo how good are they

Hello Cubo how are you. I have a question is the Cubo 18 suitable for small to medium sized events in a scenario wherby i will use it with a mid high cabinet directly on top of the cubo 18 using a speaker pole.

Hello

Would it be a good idea to put the PDN.18BR40 speaker in the cubo18 box? I have two lying around at home...

If so, extended or normal version? I seem to remember that I quickly reached the xmax in BR

As the V18-1000 is based on the PD.1850/1, the current PD.1850/3 is probably the closest in weight and performance. The 18DS115 is neodymium and can be seen as a step up in performance but like the 18IPAL, it will need amplifiers in excess of 2000 - 3000 W per driver to really showcase their difference. Up to about 1000 - 1500 W per driver of amplifier power I would consider neodymium drivers like the LF18N401, 18NLW9400 or the 18NW100. Their Qts is a bit higher to be considered true analogs of the V18-1000 but it's still in the right ball park. While they "only" have 4" voice coils, they're of a newer generation and typically weigh less than 10 kg.

I understand. It was clear to me that such non-neodymium drivers would make transport considerably more difficult. However, I first wanted to weigh what is possible without paying attention to the weight.

Are there drivers that deliver similarly good results, and maybe even be neodymium-loaded in the best case?

Im located in Germany.

@oskarociak: If you already have it you might as well use it, it should take similar power as in the reflex but will have more output. It does benefit from a high pass filter around 35 - 40 Hz, due to the limited Xmax.

@DevFelix: Drivers like the V18-1000 are not very common and tend to be expensive as well (large voice coil and low Qts do that to any driver). The V18-1000 was basically a cheaper alternative for the PD.1850. Non- neodymium drivers like that are a b!tch to move though, you need to be in great shape to not mind.

Where are you located?

Hey Cubo,
great design!

The Gain SPL Diagram clearly shows that the case works very well together with the V18-1000.
Unfortunately, it is only available to a limited extent in my region. Is there a good alternative?

Greetings

Thanks
I have speaker in bad reflex (90L)

The Sigma Pro-18A-2 is a good speaker for Cubo 18 Standard, the main two drawbacks are the lowish Xmax and the 3" voice coil. Do you use these already or are you planning to buy them?

Hi
would it be a good idea to put the Eminence Sigma Pro-18A-2 speaker in the cubo18 box?

I never reversed polarity with the magnet visible (it sounded fine to me) but it also depends on the tops you're using, so you can always try both ways and have a listen.

good morning when mounting the speaker backwards (magnet out) on the Cubo 18 do I have to revers the wire polarity?

The 18 Sound 18NTLW5000 does not fit (under normal circumstances) in Cubo 18, mounted with the magnet in the horn, due to the driver depth. However some changes can be made to make it fit. It does fit mounted with the magnet in the chamber, with some minor changes.

It does work best in Cubo 18 Extended, if you need help with making changes so it fits, send me an e-mail at: questionsaboutcubo at gmail dot com

Cubo

Hello, have anyone Test the 18 Sound 18NTLW5000 in die Cubo 18? Or can say if the ntlw will work in the Cubo 18?

Thx

Thank you very much, I`ll send you pics and keep you posted

@Dave305: From that list I would choose the FTR18-4080FD, it's a good driver for Cubo 18 Extended. I think you also e-mailed me that you wanted 30 Hz performance, in which case you're better off using Cubo Sub. However the FTR18-4080FD might be on the light side for all day 30 Hz performance (couldn't find Xmech though).

@Jack: The 18NLW9400 is the 18Sound equivalent of the B&C 18NW100, both rated at 1200 W AES, it would be my choice with an amplifier of roughly 1200 W or less. The 18TLW3000 is a very high power driver, with the 4 Ohm version looking best (better than the 8 Ohm version), it's a good choice if you have around 1800 W or more to power it with.

Cubo

Hi All,

So after faffing around for too long I missed the boat on the 18nw100 availability and they're now on back order for at least 80 days from one of the few places that ship to NZ I'd heard some positive things about the 18TLW3000 en.toutlehautparleur.com/18-sound-18tlw3...r-4-ohm-18-inch.html but it EBP (as you've defined Fs/Qts) is only 91hz. Is this going to make it a non-starter? Very open to other suggestions - am trying to balance getting something that will work well in the Cubo 18's (which I have the wood cut and ready for) and be ported into one of the paraflex designs once the price of timber goes back down in NZ (3 sheets per box at $280nzd a shot is a bit nuts!)

Hello, MR.Cubo
Trying to build the cubo18 not sure which of the two I should build
the drivers in my price range and in stock are

JBL. 18SWS1000

SWLENIUM 18SWS1000

CELESTION FTR18-4080FD

EMINENCE KAPA PRO

CELESTIOR. CF1830E

thank you very much Mr. CUBO. anyway I was wrong to write. I have the 18NLW9400, so it will work fine inside

The 18NLW2400 is an 18 inch extended low frequency loudspeaker designed for high SPL subwoofer applications in either a reflex, bandpass or horn loaded configuration. Compared to our industry standard 18LW1400, the 18LW9400 provides higher maximum SPL, increased program power handling and lower power compression. In order to furtherly increase power handling and reduce power compression figure, 18NLW9400 uses the same voice coil ventilation technology developed for our flagship 9000 neodymium transducer series. 

Apparently, they couldn't choose it's final name then. Now it's known as the 18NLW9400

Both the Ciare Cw455 and the 18NLW9400 will work best in Cubo 18 Extended.

Best regards Cubo

hello Mr. CUBO, I have recently purchased an 18NLW2400, would it work better in the standard or extended version?

Hi Nugget,

Those are looking great! All measurement data is welcome.

Cubo

Hey Cubo after you helped me and everyone else here so much, i thought you might be happy about some building Pics. I built 4 Cubo 18 extended in February and also did some measurements, which i uploaded as pictures too. If you're interested in the measurement data for group delay, distortion, etc. just tell me and i will send them to you.

Here's the link: www.audiofotos.eu/album/cubo-18-extended.mxi