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Old 12th December 2010, 06:43 AM   #1361
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Quote:
Originally Posted by Roemhild View Post
I have tried to build my final speakers. Well we will see how long I will keep them.

The construktion is for the Fostex FX200. The faceplate is to absorb a peek at 8 kHz. There are no filters or passive components between the speaker and the amp.




cya Till
These are really lovely. I am sorry but I can not read German and while I enjoyed the website I was wondering if there has been a discussion or plans for these cabinets that you could refer me to. Thank you in advance.

Bruce
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Old 13th December 2010, 02:59 PM   #1362
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Originally Posted by planet10 View Post
I think Gregg the Geek came up with the idea, putting a tube into the Korean Joy of Music OB drivers at VI diyFest '05. With all the rattly bits in a tube, really should only be a temporary fix.

dave
too bad, 'cause it looks pretty cool
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Old 13th December 2010, 03:08 PM   #1363
jrenkin is offline jrenkin  United States
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Quote:
Originally Posted by planet10 View Post
I think Gregg the Geek came up with the idea, putting a tube into the Korean Joy of Music OB drivers at VI diyFest '05. With all the rattly bits in a tube, really should only be a temporary fix.

dave
Some one thinks they are worthwhile. See this link.

DECWARE Full Range Driver DFR-8.

I know there are pinions on the Decware stuff and I haven't heard these, but I think it is interesting that he has made a real fancy resonant cavity phase plug for one driver and then finds that this tube is as good as it gets for this one.

I'll try it with a few drivers, if I have tubes that fit just for kicks.
For the magnet to hold them, do you clip off the pins?
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Old 13th December 2010, 03:19 PM   #1364
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by jrenkin View Post
Some one thinks they are worthwhile. See this link.

DECWARE Full Range Driver DFR-8.

I know there are pinions on the Decware stuff and I haven't heard these, but I think it is interesting that he has made a real fancy resonant cavity phase plug for one driver and then finds that this tube is as good as it gets for this one.

I'll try it with a few drivers, if I have tubes that fit just for kicks.
For the magnet to hold them, do you clip off the pins?
if anything, I think you'd want more surface contact area than just the pin tips, and if they're not uniform length, chances are the tube might sit crooked, which could be an issue in cases of tight tolerances
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Old 13th December 2010, 05:00 PM   #1365
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Quote:
Originally Posted by jrenkin View Post
For the magnet to hold them, do you clip off the pins?
Our experience is that they tend to wander, as there isn't enuff magnetic surface area to keep them in place. Clipping the pins won't help with that, althou it will bring the centre of gravity closer to the attachment point.

This was a common sight when we tried it, oh so many years ago.

Click the image to open in full size.

dave
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Old 13th December 2010, 05:23 PM   #1366
brsanko is offline brsanko  United States
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Just superglue 'em.
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Old 13th December 2010, 05:44 PM   #1367
jrenkin is offline jrenkin  United States
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Originally Posted by brsanko View Post
Just superglue 'em.
Then you had better like them. I have a pair of Fostex 208 sigmas that I bought with installed phase plugs. Unfortunately glued in. They are just a little small, a poor choice by the original owner, and I still am trying to figure out how to get them out. I think I can do it, because he didn't use superglue at least.

Maybe epoxy to a washer, then they work.
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Old 13th December 2010, 05:46 PM   #1368
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Good point.
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Old 15th December 2010, 02:51 PM   #1369
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Default Tang Band W8-1772 Exceeded My Expectations

I was a full range skeptic. After reading posts here and elsewhere evaluating the W8-1772 I decided to give them a try. The sale price at Parts Express was the deal maker for me.

Boy, I am happy I took the plunge on these. I never believed that an 8" FR speaker could have this strong of a top end. The1772 has a rising response all the way to artound 15K! That is astounding performance for an 8" speaker.

I installed these in a 40L (1.4 Cu Ft) enclosure with a 3"D port tube 6" long. They are tuned to about 40hz. Now that I have the port tubes installed I can hear response below 40hz.

Out of the box the speakers are a bit bright. That needs to be addressed. I am in the process of experimenting with BSC circuits. I am also considering notch filter and Zobels suggested by the pros.

The sound is truly full range and clean. maging is impressive. These are expensive drivers, close to $200 each but worth every penny. If you see these at a sale price jump on them!
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Old 15th December 2010, 03:53 PM   #1370
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Jim - the fun factor can be exponentially higher as the physical dimensions and cost of drivers declines!
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