Cubo 18

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12 years 7 months ago #15013 by Cubo15
Replied by Cubo15 on topic Cubo 18
Currently there are no Cubo designs for 20 Hz performance. However you could easily design a tapped horn for the RCF and JL Audio drivers to do that. With the 18" it will be easier to get a decent sensitivty but the displacement of the 12" is larger which would make it easier to get it down low but likely with a lower sensitivty.

A SPL of 120 dB/W/m (f6 @ 20 Hz) is easily do-able in half space without getting to large (overall size of Cubo Sub), with a single driver. That could work up to 130 dB/W/m, with an f3 @ 20 Hz in 1/8 space.

Best regards

Cubo

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12 years 7 months ago #15018 by SOUNDMAN_K
Replied by SOUNDMAN_K on topic Cubo 18
Thanks for the response.

But I did not understand what it meant half space.
The RCF is 18 inches. And JL is 12 inches.
Which one will give more power at low frequency.
And had more kick.
I'm looking for a subwoofer will be felt in the chest.
For example: Trance music. Feel the vibrations throughout the body and the couch.

Thank you for your help

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12 years 7 months ago #15026 by nickyburnell
Replied by nickyburnell on topic Cubo 18
20hz in trance? I don't think so.

Maybe some research into actual HZ.

Trance in general sounds best with lots of 63hz IMHO

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12 years 7 months ago #15045 by swan
Replied by swan on topic Cubo 18
Cubo. I have Beyma 18G40 drivers. Will the work in the cubo 18's?

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12 years 7 months ago #15073 by SOUNDMAN_K
Replied by SOUNDMAN_K on topic Cubo 18
I planned to build A CUbo 18 to my bedroom.
But he did not fit the closet . Is too high.
How do I change his measurements. Up to 48 cm depth
Width up to 1 meter. And height to 80 cm.
Priority he can get to the frequency of 30HZ.

This depth with the opening on the front side.
You can help me in planning?

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12 years 7 months ago #15084 by Cubo15
Replied by Cubo15 on topic Cubo 18

swan wrote: Cubo. I have Beyma 18G40 drivers. Will the work in the cubo 18's?

Yes, these drivers work best in Cubo 18 Extended and will take equal or more power as in a reflex design.

But I did not understand what it meant half space.

forum.speakerplans.com/guide-to-winisd-p...post11070.html#11070 (Under ANG:).

I'm looking for a subwoofer will be felt in the chest.

It's often the kick that is felt in the chest, the lowr kick starts at about 80 Hz, going upwards from there.

For example: Trance music. Feel the vibrations throughout the body and the couch.

Regular trance music hasn't much content below 40 Hz. Some samples might dive down to 30 Hz. To feel the music you would need high SPL.

My first bet would be the JL Audio 12" in a largish reflex design tuned low (so that it makes plenty of excursion with lower power levels) and place it nearby your couch. Consider placement in your room, in a corner or against a wall will increase the overall SPL-levels, see link. Ussually there is a bass minimum in the middle of the room, whilst there is an overload of bass near the walls.

Alternatively build a Cubo Sub that is 48 cm wide (so 77 x 77 x 48 cm). It will go down to 30 Hz and interact better with the room gain as the standard Cubo Sub.

Best regards

Cubo

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12 years 7 months ago #15090 by SOUNDMAN_K
Replied by SOUNDMAN_K on topic Cubo 18
10X for the Response.

if it Possible to get a sketch. Measurements of the bords in the box.

I have several options
RCF L18-P200
RCF L18-P300
CERVIN VEGA STROKER 12 - 1995
CERVIN VEGA STROKER 18 - 1995
the old Woofer.

The JL Not Relevant now.
Which would you choose and why?

What gives the most bass. SPL?

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12 years 7 months ago #15091 by SOUNDMAN_K
Replied by SOUNDMAN_K on topic Cubo 18
DELETE

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12 years 7 months ago #15098 by xsdata
Replied by xsdata on topic Cubo 18
Hey there Cubo, firstly thanks for the simple design and effort you have put into this. Im currently getting 2 cubo 18 cut for me and was wondering if you could answer a few questions

1. What saw blade width have you used ? 300 mm ??
2. And the panel thats 47.7 *58.4 is the one with the 17.5 degree angle cut along the longest edge yes ? and also the sheet that holds the driver?
3. the pieces of wood that go around the mouth what is the angle on those , the ones that sit under the panel that supports the driver ?> is it 17.5 again ? heres a pic of what i mean http://desmond.imageshack.us/Himg826/scaled.php?server=826&filename=cubo1820.jpg&xsize=640&ysize=640
Another question the large triangle support I notice in the construction pics you have had to cut out a notch but its not in the plan ?

a quick answer would be good as Ive paid to get it cut and dont want to make any mistakes.

Regards

Pete

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12 years 7 months ago #15105 by Cubo15
Replied by Cubo15 on topic Cubo 18
@Soundman: I've moved the answer to the Cubo Sub topic to keep the different topics clear:

www.freespeakerplans.com/index.php?optio...c.php&p=15104#p15104

Best regards

Cubo

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