Cyburg's Needle for Bass

[Relax]

I am looking to build a small enclosure similar, or exactly like, the Cyburg needle. I want the same tall skinny not-so-deep box witha single driver in it. I want to build two for musical bass.

What are your thoughts, suggestions?

I want to use them to compliment the sealed TB W3-871 lower end. Hopefully with the .10 cubic foot sealed enclosure on tope, resulting in a two driver facing me arrangement with healthy bass down to 40 hz or so for music.

Maybe just a good cheap woofer in the cyburg needle?

I am looking to spend around 20 for woofers. and mayeb another 20 for XO.

Is this realistic?

I noticed partsexpress is sellign Brauvox woofers for like 4 dollars, perhaps two in dipole arrangement int he needle?

[Relax]

perhaps this woofer in a similar sized TL:

http://www.partsexpress.com/pe/showd...number=290-301

or two of these:

http://www.partsexpress.com/pe/showd...number=269-680

just a similar sized TL with cheaper drivers is what I am looking for.

What programs could I used to design my own TL?

[kelticwizard]

Do you have a link to a page with this Cyburg needle? Jim Read's page does not seem to be working, and when I go to the cached version the picutres aren't there.

This Cyburg needle is a pyramid, right? If not, what shape is it in?

I can model something for you using Martin J King's TQWT pages, but I unfamiliar with this Cyburg needle and need to make sure what you want.

[kelticwizard]

There is a thread on building the Cyburg needle, by the original builder himself, Berndt Burghard. It uses the same W3-871 that you want to use for sealed bass.

http://www.diyaudio.com/forums/showthread/t-47403.html

And here is a jpg in case that doesn't load.
http://img95.exs.cx/img95/684/cyburgsneedleeng7ie.jpg

As far as using a sub, a TL is by nature a bass enhancing device. You want to build a TL and then a sub underneath it?

[Relax]

No, i have the TangBand in the .10 cubic foot enclosure foudn easily all over the net.

I am really pleased with the sound and like it very much.

I want to build a TL for a different driver, cheap, to build then add the Tang Band ontop in the sealed enclosure. SO the hope is to get a decent looking and sounding floorstander using the TBs I already have.

I have tried the Tangband's in the Needle, which is the reason for my interest in maybe a modified needle for a different driver.

Any suggestions on a good little driver for bass in a Tl similarly sized?

I tried my best at working the Math Cad sheets, but I think I am impaired or the drivers i am using are not suited for TLs.

Are there any attractive yet cheap drivers to reienforce the low end of the TB W3-871s?

Thanks very much!

[kelticwizard]

Okay, best as I can see, the internal dimensions of the Cyburg is 36" high by 4" wide by 6.875" deep. One half inch building material is used except for the top and bottom, which is 0.75 " thick.

The internal volume-minus the diagonal divider-is 0.57 cu ft. Or 16 liters, as you prefer.

If nobody else does a sim, I think I can look at those two drivers you asked about tomorrow and see how they would fit into the Cyburg using Martin King's software.

[Relax]

thanks very much, the brauvox ones are now sold out, and i have been told the Qts of the goldwood is much too high.

Using Qts between .3 and .5 as guideline, i found this driver:

http://www.partsexpress.com/pe/showd...number=295-330

Would this owrk well or would a different driver be better?

Thank you before you do anything though, for even considering helping me!

[kelticwizard]

The Bravos have an Fs of 150 Hz. Don't think that is going to do it for you basswise.

You mentioned $20 for woofers. Is that each or for both woofers together?

I haven't modelled it yet, but here is a TangBand which looks like it might be dropped right into the Needle and give you something down into the 40's. About $20 per side. Want me to give that a try? http://www.partsexpress.com/pe/pshow...number=264-824

[Relax]

I was hoping to spend 20-30 tops for drivers, i kinda am just hoping to see if i can add something to fill these TB's lower end.

Plus I want the tall floorstander look with two drivers.

Would these work?

http://www.madisound.com/pdf/audax/VP130Z0.pdf

they are 14 a piece.

they daytons are 12.

SO to recap one of these 3 best price/performance:

http://www.madisound.com/pdf/audax/VP130Z0.pdf ----$14

http://www.partsexpress.com/pe/showd...number=290-302 -----$8

http://www.partsexpress.com/pe/showd...number=295-330 -----$13

I like the looks of the bottom two best(if their comes a tie...)

Thank you so much! Goodnight for me!

[kelticwizard]

First impressions, before modelling, is that the Audax and the Dayton look pretty good and should get you down into the mid 40's somewhere.

Will model them Saturday.

Now, one question. Do you have the Needle already built? You said you tried the TangBand in the Needle already. Reason I am asking is that with the 5.25" Audax and Dayton, the Needle might have to be widened slightly. My calculations show a Needle internal width of 4" and an external width, (with 1/2" building material) of 5".