Cyburgs-Needle for Tangband W3-871S

I hope that this could be of interest for you.

I constructed the Cyburgs-Needle originally for Visaton FRS8, which is a nice and cheap fullrange driver here in Europe. The Needle was quite a sucess here, I know of about 20 pairs built by DIYers, and there may be even more. However, I have been looking for an alternative driver to make a "High-End" version of the Needle. I tested several different 8cm drivers, and the Tangband W3-871S finally did it. Unlike the FRS8, you need a notch filter, the values you will find in the plan.
I think that the availability of the Tangband is better outside of Europe, so I hope you will have fun with this plan.

Nice greetings, Berndt

An externally hosted image should be here but it was not working when we last tested it.
 
Some threads ...

... in the Visaton forum, where you can see very nicely built Needles. Unfortunately I don't have pictures of the two pairs I built.
The threads are in German btw.

http://www.visaton.de/vb/showthread.php?s=&threadid=8336&highlight=needle

http://www.visaton.de/vb/showthread.php?s=&threadid=8234&highlight=needle

http://www.visaton.de/vb/showthread.php?s=&threadid=8027&highlight=needle

http://www.visaton.de/vb/showthread.php?s=&threadid=7884&highlight=needle

Not a thread about Needles, but on the second picture you see a Needle with Tangband:
http://www.visaton.de/vb/showthread.php?s=&threadid=8166&highlight=needle
 
@Gio:

Unfortunately not, I forgot to make screenshots, shame on me. And at this time I don't have ready built needles. I will provide the plots when I have built my next pair.
From sound point of view they are fairly flat, and will provide bass down to under 50 Hz in the room. So a sub is not necessary. The SPLmax is limited of course, for it is only a 8cm driver. The soundstage is very impressive as with most small fullrange drivers.

Nice greetings, Berndt
 
@dvdwmth:
Yeah, the woodrings look really nice, but I think they need quite experienced handicraft. Seems not to be easy.

The bass coming from Needles and Bricks is really amazing for such a small driver. But as I said before, the physics can not be cheated, the SPLmax is naturally limited.

Nice greetings, Berndt
 
sounds interesting, ... what about using 2 drivers per cabinet to overcome SPL limitations ??
I build a lil QWT with the W3-871S which worked out very nice.
(thanks to Rudolf and MJK)
I planned in a sub for my PC-setup but don´t use it now.:D
But yes it is SPL-limited. Especially with music that contains "electronic" bass the TQWT turns into a hair-dryer. ;)

You could easily take that design, double the CSA and put a second TB on the back (which is what I plan for the near future).

If you´re interested in more info or pics drop me a mail.

See post4 for specs here.
Chris has built this especial one; see post 44 for a pic and measurements.
 
I bet you're proud to see your design at the Atlanta event!
Rudolf designed it; I just changed a few measures to my taste.
But yes it´s nice to see designs go round the ball.
DIY+internet is a cool thing to have.

It would be interesting to see FR graphs for the 70" long TQWT being discussed here.
SPL-capability in the QWT I built is bad enough and I wonder too what such a long line really does.
Just like this one : http://www.visaton-bausaetze.de/hifi/lancetta.htm
Yes, the W3-871S and other Tangbands have now arrived at german DIY magazines too.
 
I did already something like "this" :)
It is called Janosch and consists of two Visaton FRS8 in push-push configuration. The rear driver is loaded with a TQWP in a similar contour as the Needle, the front driver works on a closed volume of about 4 liters.
If you keep in mind that they have to stand at least one meters from the walls, you may guess what the most problematic parameter of the Janosch is :-D (tip: HAF!).
Although I prefer directive speakers, the Janosch's soundstage it impressive and has a nice depth. I don't know if this holographic impression comes really from the CD or is produced by the speakers ;-), but it is much fun.

An externally hosted image should be here but it was not working when we last tested it.


This was a second try I concepted together with a friend. Due to the tilted rear speaker the minimal wall distance is now half a meter. The gimmick of this speaker is that you can exchange the terminal and the rear driver and convert ist to a symmetrical push-push speaker.
An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.
 
@gio:

Regarding measurement of the needle:
I made a F-response measurement of the Cyburgs-Brick with the Tangband W3-871S and the notch filter. As the Brick has basically the same contour as the Needle, the response curve is compareable.

The measurement was made in the middle of the listening room, so there is some room influence in the bass region.

An externally hosted image should be here but it was not working when we last tested it.


Nice greetings, Berndt