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Old 29th April 2007, 11:21 AM   #1
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Default Any info on old Seas drivers?

I'm seeking info on a couple of vintage Seas drivers that were in a full-range coaxial sealed box speaker, marketed in Australia* under the Interdyn brand. (* Well, that's where it is now!)

There is a 30cm woofer, 8 ohm, which bears "30TV - coax" and "40-73",
and a tweeter, 8 ohm, which bears "9TV" and "36-73".

The cap & inductor cross-over bears some info, including that it crosses at 4000Hz.

Now before anyone recommends I go to the Seas site (www.seas.no), I have been there.
I found reference to a tweeter "9TV-LG". Not exactly what I have, but it seems the right size.

However there is no mention whatsoever about the woofer. Can anyone help?

And for extra brownie points, how hifi ... or lofi ... were they in their day?

Thanks Doug
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Old 29th April 2007, 09:56 PM   #2
Geoff H is offline Geoff H  Australia
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Hi Doug, we're winding back the clock here. IIRC Alex Encel marketed Interdyn from his Richmond Vic store in the 60 - 70s.

I recall the 30TV, but not a coax variant, instead a dual cone with a pleated surround. I and a friend wrote them off as PA drivers. We were young and foolish, thus wrong.

Be warned, ZenMod will probably hate you, and offer a disposal service. Save on freight, send them here instead.

How do they sound? Could probably do with some cone treatment and plugs.

Cheers,
Geoff
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Old 30th April 2007, 12:22 AM   #3
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Quote:
Originally posted by Geoff H
Hi Doug, we're winding back the clock here. IIRC Alex Encel marketed Interdyn from his Richmond Vic store in the 60 - 70s.

I recall the 30TV, but not a coax variant, instead a dual cone with a pleated surround. I and a friend wrote them off as PA drivers. We were young and foolish, thus wrong.

Be warned, ZenMod will probably hate you, and offer a disposal service. Save on freight, send them here instead.

How do they sound? Could probably do with some cone treatment and plugs.

Cheers,
Geoff

Well Geoff,
On first hearing they aren't too bad. Drivers all in good condition, visually.

Before playing, I opened the boxes and soldered on better speaker cables. (The wires fitted were tiny. Horrible.) If I decide to keep them for a while I'll fit binding posts.

They aren't twin cones. (So no cigar!)
The tweeter has a closed-in back.
The woofer cone is not a straight cone, but is ?parabolic? It appears to be paper, and has a triple concetina edge.

... so anyone else with ideas? :-)

Doug
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Old 30th April 2007, 01:40 AM   #4
Geoff H is offline Geoff H  Australia
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Hi Doug,

That's known as a curvilinear cone.

Should look similar to this one, minus the whizzer cone.
Attached Images
File Type: jpg 30tv_s.jpg (56.0 KB, 312 views)
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Old 30th April 2007, 01:55 AM   #5
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Quote:
Originally posted by Geoff H
Hi Doug,

That's known as a curvilinear cone.

Should look similar to this one, minus the whizzer cone.

Here's a picture of the beast:
Attached Images
File Type: jpg interdyn.jpg (63.5 KB, 302 views)
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Old 14th September 2010, 02:23 PM   #6
rhing is offline rhing  United States
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I'm reviving this thread, because I recently purchased a pair of speakers with these Seas coaxial drivers. I too am looking for any information on these drivers. These must be really obscure, because I can't find anything on these including the Seas Web site.

Connected to my refurbished Magnavox 93-04-20 6BQ5/EL84 P-P amp, these speakers make beautiful music. They're not quite as refined as my upgraded Klipsch Forte IIs in terms of frequency extension and transparency, but they project a three dimensional image and an incredible midrange.

Seas Coaxial Speakers.jpg Seas Coaxial Front.JPG

Seas Coaxial Rear.jpg Seas Coaxial Flange.JPG

Any help is greatly appreciated.
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Old 14th September 2010, 08:22 PM   #7
AuroraB is offline AuroraB  Norway
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Brisso...
at the Seas pages, under "Vintage drivers - very old", there's a list of data sheets. At the very end, there's two pdf's "from the 70s" 1 and 2......
in no.1 you'll find some data - no curves, though......

http://www.seas.no/images/stories/vi..._the_70s_1.pdf
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Old 14th September 2010, 08:55 PM   #8
Zen Mod is offline Zen Mod  Serbia
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just replace those venerable caps , put them in even bigger enclosure and enjoy ......
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Old 14th September 2010, 10:25 PM   #9
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Hi Brisso57, Just in case any locals want to pursue SEAS stuff in the SE corner there is a pair of old SEAS two-ways going in "The Trading Post" on the Web. Suburb Ashmore(?) (Gold Coast) I think. At least they were still there last w/end. Photo of the cabinet with the back off. Look a little over priced to me but "horses for courses" I guess.
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Old 15th September 2010, 10:45 AM   #10
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Thanks guys.
I've moved on to other projects. Those boxes are on semi-permanent "loan" to a friend of mine.

cheers

Doug
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