Cyburgs-Needle for Tangband W3-871S - Page 2 - diyAudio
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Old 16th December 2004, 04:24 AM   #11
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Been waiting for something like this for a long time. Think I might actually splurge and grab a set of the 871s and build some computer speakers!

Thanks for all your work!
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Old 16th December 2004, 12:42 PM   #12
joensd is offline joensd  Germany
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Quote:
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 donīt use it now.
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 youīre 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.
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Old 16th December 2004, 01:00 PM   #13
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Hi joensd. I bet you're proud to see your design at the Atlanta event! The FR graphs were very interesting to see also. It would be interesting to see FR graphs for the 70" long TQWT being discussed here.
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Old 16th December 2004, 01:14 PM   #14
joensd is offline joensd  Germany
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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 itīs nice to see designs go round the ball.
DIY+internet is a cool thing to have.

Quote:
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.
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Old 21st December 2004, 12:01 AM   #15
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Default maybe...

maybe something like this would work to fix the spl issues?

i'd be VERY interested to see what could be accomplished with an enclosure with than and some 3" tb drivers...

sheesh...i've been looking into building some nice fostex full rangers but those might have to wait...
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Old 21st December 2004, 08:42 AM   #16
Cyburgs is offline Cyburgs  Austria
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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.

Click the image to open in full size.

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.
Click the image to open in full size.

Click the image to open in full size.
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Old 2nd January 2005, 02:19 PM   #17
Cyburgs is offline Cyburgs  Austria
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Default @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.

Click the image to open in full size.

Nice greetings, Berndt
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Old 2nd January 2005, 09:26 PM   #18
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Well, you could not ask for a better representation of the "comb" filter effect on the lower freqs...

I am thinking of doing this with a spare set of Fostex FE 103's I have lying around the house...
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Old 23rd January 2005, 06:04 PM   #19
Cyburgs is offline Cyburgs  Austria
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Default Ooops ...

... found a small typo in the notch filter values. Here is the new version of the plan:

Click the image to open in full size.

I tried to edit the plan, but I am not allowed to. Guess the thread is too old now.

Nice greetings, Berndt
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Old 25th January 2005, 10:39 PM   #20
ebijma is offline ebijma  Netherlands
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Default Re: Ooops ...

Very interesting design. (thanks Cyburgs)
Think i build these.
Now where can i find the tangband drivers in Europe?
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