New Jordan driver - preliminary details - Page 14 - diyAudio
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Old 15th January 2013, 03:45 AM   #131
rdf is offline rdf  Canada
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Originally Posted by planet10 View Post
THose would be VIFA made, i'm pretty sure all the 3 pair we have had thru hear were Chinese made (none of which we were enamoured of)

dave
You my be right. I recall the first being Vifa. The difference isn't subtle, the others are fairly aggressive.
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Old 17th January 2013, 07:35 PM   #132
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The old fashioned way of inscribing the pattern with a sharp knife and the hand chiseling with a sharp wood carvers chisel
or cut the fancy pattern in thin ply, fitted over the driver screwed to the baffle. You can then give out with "Baffle Optimized Constrained Lyer Damping" or some such guff. Less dust, no machines - Ned Ludd strikes again!

Cheers Steve
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Old 17th January 2013, 08:14 PM   #133
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Has anyone heard these yet?
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Old 17th January 2013, 08:30 PM   #134
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Originally Posted by rdf View Post
the others are fairly aggressive.
Something annoying in the top end was my choice of wording. Certainly something neither Chris or i coud live with.

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Old 18th January 2013, 08:05 PM   #135
Colin is offline Colin  United Kingdom
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Originally Posted by stevieg View Post
or cut the fancy pattern in thin ply, fitted over the driver screwed to the baffle. You can then give out with "Baffle Optimized Constrained Lyer Damping" or some such guff. Less dust, no machines - Ned Ludd strikes again!

Cheers Steve
Not a bad idea at all. David Berriman designed a DIY speaker for Hi-Fi News some time in the 1990s which took this approach. He had a straightforward circular cutout for the Volt driver and then had a thin sheet of MDF or ply cut to the shape of the driver frame. He suggested covering this with leather material, wrapped round the back, before fitting to the baffle.

A bit old-school but it looked smart enough in the photos, once the restof the cabinet was veneered.
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Old 20th January 2013, 01:32 PM   #136
rdf is offline rdf  Canada
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Originally Posted by planet10 View Post
Certainly something neither Chris or i coud live with.
More than recommended toe-in helped. The real solution might be a little series LRC tailoring.
The 'bad' Jordan still left any well-regarded TB in my experience far behind for high freq performance, the Vifa version is in a completely different class top to bottom. I find hem a high value driver because, while much less expensive, alternatives like the TB Bamboo ultimately ended up in the closet. Very much looking forward to what Ted pulls of with this one.
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Old 20th January 2013, 02:25 PM   #137
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Originally Posted by Colin View Post
Not a bad idea at all. David Berriman designed a DIY speaker for Hi-Fi News some time in the 1990s which took this approach. He had a straightforward circular cutout for the Volt driver and then had a thin sheet of MDF or ply cut to the shape of the driver frame. He suggested covering this with leather material, wrapped round the back, before fitting to the baffle.

A bit old-school but it looked smart enough in the photos, once the restof the cabinet was veneered.
If these were the DB6, with the 8 inch poly cone, then my dad built a pair. It didn't use a volt driver, but the construction technique you described is exactly how they were build. He still uses them, but I did redo the cover, which originally had quite a rolled off upper treble.
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Old 21st January 2013, 05:22 PM   #138
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DB6, that's the one. My mistake re the Volt driver.
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Old 21st January 2013, 06:16 PM   #139
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The best way I've found when covering an oddly shaped chassis, though not necessarily the cheapest, is to get a panel CNC cut and anodised, I use Schaefer for Europe though they do have services in the US.

So in this case, CNC out the driver rebate slightly deeper, then the circular rebate on top, screw in the covering panel over the driver, making sure you've aligned the fixing holes on both!
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Old 24th January 2013, 05:21 PM   #140
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Oh well, since the Eikona now appears to have been officially released, here's an MLTL for it, FWIW. This is from the published data on the Jordan site BTW.

40in x 7.5in x 10.625in (internal HxWxD).
Zd = 8in.
Slot vent 1.625in tall, full internal width. 0.75in long at the bottom of the box.
Stuff 0.75lbs ft^3 dacron or similar throughout box.

This is one of my favourite MLTL alignments since you've got a reasonable amount of LF extension & some assistance for step-loss, with a TL-style impedance load through the extensive damping. Basically, it's a similar style box to the pensil cabinets I did for the MA units.

Interesting the new Jordan looks like it's taken the same approach as the MA drivers by providing a lift in the LF, presumably to help with step-loss.
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