Any info on old Seas drivers?

Brisso57 · 29th April 2007, 11:21 AM

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

Geoff H · 29th April 2007, 09:56 PM

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

Brisso57 · 30th April 2007, 12:22 AM

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

Geoff H · 30th April 2007, 01:40 AM

Hi Doug,

That's known as a curvilinear cone.

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

Brisso57 · 30th April 2007, 01:55 AM

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:

rhing · 14th September 2010, 02:23 PM

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.

AuroraB · 14th September 2010, 08:22 PM

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

Zen Mod · 14th September 2010, 08:55 PM

just replace those venerable caps , put them in even bigger enclosure and enjoy ......

Jonathan Bright · 14th September 2010, 10:25 PM

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.

Brisso57 · 15th September 2010, 10:45 AM

Thanks guys.
I've moved on to other projects. Those boxes are on semi-permanent "loan" to a friend of mine.

cheers

Doug

29th April 2007, 11:21 AM	#1
Brisso57 diyAudio Member Join Date: Sep 2005 Location: the leafy west of Brisbane	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

14th September 2010, 02:23 PM	#6
rhing diyAudio Member Join Date: Jun 2007 Location: Bay Area, California	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. __________________ Rich

14th September 2010, 08:22 PM	#7
AuroraB diyAudio Member Join Date: May 2001 Location: Norway, -north of the moral circle..	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 __________________ While the Lie leapt from Bagdad to Constantinopel, the Truth was still looking for it's sandals!

14th September 2010, 08:55 PM	#8
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	just replace those venerable caps , put them in even bigger enclosure and enjoy ...... __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

14th September 2010, 10:25 PM	#9
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	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. __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.


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29th April 2007, 09:56 PM	#2
Geoff H diyAudio Member Join Date: Oct 2006	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

15th September 2010, 10:45 AM	#10
Brisso57 diyAudio Member Join Date: Sep 2005 Location: the leafy west of Brisbane	Thanks guys. I've moved on to other projects. Those boxes are on semi-permanent "loan" to a friend of mine. cheers Doug __________________ A speaker-builder's parable: "That burned down, fell over, then sank into the swamp. But the fourth one stayed up. And that's what you're going to get, Lad, the strongest castle of all."

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