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Old 6th January 2013, 07:32 PM   #321
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Nice job there Xerxes!
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Old 6th January 2013, 07:42 PM   #322
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Well I must say it's another successful build. I remeasured the cone. It's a mere 24 cm^2 so smaller than tweeters of yesteryear.
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Old 6th January 2013, 07:49 PM   #323
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Cal,
Looks fantastic! Congrats Your edges and cuts look very clean. How was it building in all foam this time? And you are killing me with anticipation.... how do the Jordan's sound in the spiral?
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Old 6th January 2013, 07:51 PM   #324
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Thanks X,

They sound better than in any other box I've tried. There's actually a hint of bass.
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Old 6th January 2013, 07:55 PM   #325
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Is it my imagination but those Jordan's resemble Mark Audio's in frame, cone, and terminal locations. What is the Fs of this driver?
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Old 6th January 2013, 08:13 PM   #326
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Other way round. Mark used to work for Ted Jordan before starting Mark Audio. The drivers are old enough that I can't find much on them but this is about the 3rd generation of the 50mm cone drivers. There is only a surround, no spider so you have to be careful with excursion.

I would guess the Fs to be in the neighbourhood of 100Hz, maybe a bit less as they have a recommended XO of 120Hz when used with a woofer. Sensitivity is about 80 or 82 dB.

EDIT: I may not be right about the above as the driver cone is a little bigger than 50mm [hence the 6T designation?], more like 54mm and I have learned the 50mm cones had a very high Fs and a Qts well above 1.0 so I'm not sure what these are.
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Old 6th January 2013, 08:29 PM   #327
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Quote:
Originally Posted by xrk971 View Post
Is it my imagination but those Jordan's resemble Mark Audio's in frame, cone, and terminal locations.
The J6T was some of Mark's last work for Ted Jordan, In the kafuffle with EAD Mark ended up with the rights and the J6T was evolved into the Alpair 5.

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Old 6th January 2013, 08:32 PM   #328
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Thanks Dave, always a wealth of knowledge.
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Old 6th January 2013, 09:04 PM   #329
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I am thinking.

I know that scares the people who know me so let me clear the air. This is about speakers.

I have to fulfill my duty as 'yes man' for my honey but when I am done, I'm going to hang a big ol' choke on the larger Cornus and a giant cap on the new ones and run them together as they seem to each have a niche to fill.
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Old 6th January 2013, 09:14 PM   #330
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Awesome, a giant cornu two-way wall speaker. Hey you are in the wrong forum if you do this
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