Cyburgs-Needle for Tangband W3-871S

[skeeter99]

Originally Posted by O_ROD

Hey Scott, I think you'd be better off taking the path that I did and utilize the TABAQ design. Easier construction and great response. I simply doubled the length of the enclosure and turned them into bi-poles with 4 Tang Band 3" drivers I had laying around. Sounded very impressive and they had a low end that you would not expect from those 3" drivers.

Oh ok cool! Do you have a link to what you did? I'm trying to navigate on my phone since my office has this website blocked through the corporate filter. Lame!

Scott

[O_ROD]

Originally Posted by skeeter99

Oh ok cool! Do you have a link to what you did? I'm trying to navigate on my phone since my office has this website blocked through the corporate filter. Lame!

Scott

Hard to believe it's been 5 years since I've built these things, sorry no pictures, but here's the link...

My Bipole needle, and your thoughts.

[skeeter99]

Originally Posted by O_ROD

Hard to believe it's been 5 years since I've built these things, sorry no pictures, but here's the link...

My Bipole needle, and your thoughts.

Sweet thanks!!

Scott

[betso]

I wanted to build the Needles about 1.5 years ago and read the whole thread here mostly because I wanted to find some opinions about currently available drivers as the Tang Bands Cyburg originally published the project with are not easily available anymore.
At that time there was only one posting suggesting Mark Audio Alpair 6 and I spontaneously decided to use it.
I built the boxes with plywood (and not MDF) using 3/4'' thickness for the walls and preserving the internal parameters given in the original project.

I'm posting some "making of" pictures. This was the perfect DIY project doable in a small Manhattan apartment requiring no more than 10 sq ft for about 2 weeks. Btw, the boxes are also perfect in size for that kind of apartments and have a very high SAF (spouse acceptance factor).

Sound: Having no conscious experience with full range drivers before, I was surprised how full the sound picture came out even with my (at that time) Kenwood receiver which I got for $20 over craigslist and the cheapest cables bought for $1 of the Chinese $.99 shop. Meanwhile I listen to the Needles using a hand made Class A SET tube amplifier and wonder how people can listen to their cheap commercial systems.
In fact my wife was initially skeptical about the sound and I was very pleased when she was talking even months after the Needles were working how she rediscovers our music every day. :)

I just wanted to inform anyone interested in playing with the idea of building the Cyburgs Needles that the Mark Audio drivers fit very well into this project.
Thank you to Cyburg (Danke Bernd!) and to this forum for the whole invaluable information! :)

[MacDLSA1970]

Hi everyone.

Got my "needle" since about 5 months, and I'm SO satisfied.
I changed something from the very beginning of the project, because I do NOT like (and my wife,too...) the driver placed on the top of the baffle...

Different positioning of internal woodpanels have maintained the volumetric/transmission line configuration, so I think (and hope) to have kept the same sound .

Well, I keep them connected to an hybrid amplifier I built just one month ago:


The PRE section has a low-voltage ECC86 Siemens tube, Audyn input and output caps and a linear DC PSU set to 14.1V; Alps mono potentiometers to separately set the input level for the two channels.
The POWER stage is a UNmodified italian "Fenice20" with the TA2024;original PSU and potentiometer to set the "master" volume.
...easy: 1 unbalanced RCA input and L+R speaker outputs... no more !

That's the point:
the tube is not "enough" to lighten the extremely high "brilliance" of the 2024, so I had the thought of the Zobel cell...
I must be too old and "arteriosclerotic"... but could NOT find the "Le" and "Re" TangBand W3-871 values anywhere in the internet .
Anyone knows ?
... please !

[AggroMagnet]

Originally Posted by MacDLSA1970

could NOT find the "Le" and "Re" TangBand W3-871 values anywhere in the internet .
Anyone knows ?
... please !

http://www.dynabel.no/Resource/File/...D_W3-871SC.PDF

Sweet looking needles by the way.

[MacDLSA1970]

Originally Posted by AggroMagnet

http://www.dynabel.no/Resource/File/...D_W3-871SC.PDF

Sweet looking needles by the way.

Thanks !
...for both "things"
[ p.s. I had to kinda' "match" the (self-builded) furnishing, so I decided for cherry/black . Then, WAF = ok ! ]

[MacDLSA1970]

Hey ! I already have that pdf ! Mine is really arteriosclerosis, indeed !

Ok, values found ! I post the results so other people could build a Zobel cell for the same purpose...

[MacDLSA1970]

Ok, before I do stupid things better ask to the more experienced ...
The Zobel network should take into account the values ​​of the cables used, but I do not know how to integrate them in the calculation .
If anyone can help me...

I quote here the values ​​of both transducers and cables:

TangBand W3-871
Re = 6.6 Ohms Le = 0.75 mH

VanDenHul CS122 Hybrid (1.5 m per channel)
R (per lead) = 0.58 Ohm (100 m), C (between the two leads) = 32 pF (1 m)

Thanks !!!!!

[jon08]

Hi!!! I'm new on this forum and I saw all pages of this thread

I have a Logitech Z-5500 which is a little out (make noise sound) and I want to take its speakers in order to do needle. I have one question: what is the interest of the notch filter? Sorry if this is a stupid question, but I'm really new on DIY

Thanks!!