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Old 3rd February 2007, 09:09 PM   #1
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Default Tang Band W3-871S Single speaker full range

Hi all,

I am new to this forum but a loooong time speaker builder.
I am finishing up a T-amp and am looking for some small single driver speakers to use with it in my office together with a subwoofer. John Krutke's Tang Band W3-871S design seems like the best alternative for me. He has a new pair that he says is better and has superceded the Tang-Band design, so has pulled all the TB design data from his sight. However, I would like to build these anyway. They may not sound quite as good as the new speakers but I feel that I need to accept that in order to get higher efficiency.

Does anyone have a copy of this design?? Or at least a schematic of the notch filter ?? I can handle the enclosure design on my own if that is not available, but it would be a huge time saver if someone already has at least the notch filter schematic, if not the complete design, that they can share.

Thanks much,
AudioSteve
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Old 4th February 2007, 02:13 AM   #2
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Have you tried searching this forum? There are plenty of projects out there.
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Old 4th February 2007, 02:19 AM   #3
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http://www.vikash.info/audio/W3-871S/
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Old 4th February 2007, 02:56 AM   #4
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Zach,

Thanks for your response.

I have tried looking everywhere.
Vikash's site has everything BUT the notch filter. And the box dimensions are different (same volume though) as Johne Krutke's design; so the baffle step effect could be different on his box vs. Krutke's and the notch filter effect could also be a little different. Not 100% sure on that point though as I haven't crunched any numbers on it.h. The fail safe way to go would be to find both the original box and notch filter designs.

Thanks very much,
Steve
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Old 4th February 2007, 04:12 AM   #5
gychang is offline gychang  United States
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Quote:
Originally posted by audiosteve
Zach,

I have tried looking everywhere.
Vikash's site has everything BUT the notch filter. And the box dimensions are different

Thanks very much,
Steve

Steve I also have the speakers but no cabinet. Vikash's speaker seems attractive but no info on the notch filter....

gychang
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Old 4th February 2007, 04:53 AM   #6
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Default The Wayback Machine

http://www.archive.org/index.php

It's maddening when old info goes missing. The WayBack Machine
(thanks you Jay Ward) is a tool to search the internet archive.

It may be a job of looking but there's the possibility that if the
link was not specifically requested to be removed from the
archive of all past and present websites it's there.

I have a page printed on paper related to Zaphs projects for the
WS 871.

Copied off by hand it is:

http://home.new.rr.com/zaph/audio/au...ker11-box1.gif

It's a series of gifs that somewhere include the xo. I never built the
xo myself.

Happy hunting and enjoy The Wayback Machine.
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Old 4th February 2007, 09:48 AM   #7
joensd is offline joensd  Germany
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Saved the page at the time.
Its 270kB zipped.
Got an email?
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Old 4th February 2007, 03:26 PM   #8
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I think this thread has a notch filter

W3-871s over bright.
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Old 4th February 2007, 03:36 PM   #9
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Click the image to open in full size.

from: http://www.plastichead.net/audioworks/redir.php?m=speakers/speakmenu.htm&p=speakers/needles/w3s-871.htm
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Old 5th February 2007, 05:56 AM   #10
Svein_B is offline Svein_B  Norway
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In my opinion the notch-filter for the Cyburgs Needle will be well suited tfor most narrow baffle cabinets with the W3-871s. Just change the resistor and capacitor values to 6.8 as per Cyburgs corrected design.

The purpose of the notch is primarily to dampen a peak in the drivers response around 2.5 Khz. This filter also happen to roughly coincide with a suitable baffle-step compensation for narrow baffle cabinets.

SveinB
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