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Old 24th September 2011, 11:49 AM   #41
barossi is offline barossi  Germany
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Quote:
Originally Posted by saschagabor View Post
The A25-clone won't get thin-wall cabinets, not this time anyway.
Hi,
but you can build the A25 clone enclosure with that frame using 25mm walls.

KR Barossi
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Old 25th September 2011, 09:53 AM   #42
barossi is offline barossi  Germany
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Quote:
Originally Posted by saschagabor View Post
The woofer is built by SEAS, probably loosely based on the A26RE4. Devore does however claim a fairly high sensitivity for the Orangutan, so somethings must be quite different with their driver (or they simply might be doing a "Audio Note sensitivity spec").
Hi Sascha,

i seems that the woofer is the L26RFX/P:

Click the image to open in full size.

H1209-08 L26RFX/P

Devore wrote:

Everything clicked, said DeVore, when he found a new supplier (SEAS) for that 10” woofer. “The entire transaction went from painstaking to fun. It was a sigh of relief. That first pair of woofers, right out of the box, was much better.” The tweeter is a 1” silk-dome with a double-magnet motor system, “gently loaded by a waveguide.”

So it seems that this is a standart woofer from SEAS :-)


Kind Regards

Hauke
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Old 25th September 2011, 10:04 AM   #43
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That's no standard SEAS midwoofer, that's for sure. Also, I find it very unlikely that it's a metal cone, it's probably the same paper cone as the A26RE4.

But it would be nice if it was a standard woofer, that everyone could buy of the shelf, I'll agree to that
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Old 26th September 2011, 09:34 AM   #44
barossi is offline barossi  Germany
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Hi,

why not check a closed enclosure ~90 lieters for the A26RE4 first?

Click the image to open in full size.

-3dB is 44Hz and -8dB is 28Hz. Very good on paper :-)

Kind Regards

Hauke
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Old 26th September 2011, 03:42 PM   #45
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Yes, the A26RE4 does indeed like a rather large volume. However, I have two solutions I'd like to try before I'd consider a sealed cabinet for it, namely a cabinet based on Dynaco A35 (dual chamber aperiodic) and a classic TL like this one:
http://homepage.mac.com/tlinespeaker...visited-WD.pdf

I have only limited experience with aperiodic cabinets, but from what I've heard so far, combined with the honorable mentions of others, puts this approach to speaker cabinets pretty high on my list.
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Old 28th September 2011, 10:27 AM   #46
barossi is offline barossi  Germany
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Quote:
Originally Posted by saschagabor View Post
Yes, the A26RE4 does indeed like a rather large volume. However, I have two solutions I'd like to try before I'd consider a sealed cabinet for it, namely a cabinet based on Dynaco A35 (dual chamber aperiodic) and a classic TL like this one:
http://homepage.mac.com/tlinespeaker...visited-WD.pdf

I have only limited experience with aperiodic cabinets, but from what I've heard so far, combined with the honorable mentions of others, puts this approach to speaker cabinets pretty high on my list.
Hi Sascha,

mmmhh TML with the A26RE4; IMHO could be very boomy :-(

We'll perhaps build a big (~85 liters) closed box for the SEAS woofer; with -3dB@ 40Hz and -8dB below 30Hz.

Kind Regards

Barossi
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Old 28th September 2011, 12:13 PM   #47
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I use Linkwitz Pluto 2.1 but my last build was the World designs WD25A.
I thoroughly enjoyed the WD25a and keep it as my back up speaker.

This was the speaker the A26RE4 drive unit was designed specifically for by World Designs and Seas.
WD stopped making speakers when Peter Comeau left World Designs to work for IAG and the drive units appeared on Madisound.
I cannot find it on the Seas no. website so I presume they stopped production after World Designs stopped making speakers. I imagine Madisound bought up the surplus, although I am sure Seas could continue production if they get a large enough order.

That drive unit is specifically designed for Aperiodic operation, but can also suit a large enough closed box, reflex boxes or open baffles are not suitable unless only used as a midrange unit.
That speaker in Barossi's picture is very pretty. It could be an optical illusion but the dust cap looks different to the A26RE4. The paper diaphragm does appear blue, especially when the speakers are new and goes a more greyish colour, this was more noticeable with photography.

Along with Pluto the WD25a worked very successfully in my modest listening room. I am a fan of closed box operation and Aperiodic operation too.

Peter Comeau has gone on to develop a new 3 way commercial Aperiodic speaker for Wharfedale in the new Jade range. Going by the WD25 a & T I expect these will be very good passive speakers.

I chose the WD25a for it's close to wall operation, this of course curtails image depth but otherwise they are excellent.
For anyone using WD25a the upgrade to the Seas t29cf001 was well worth the cost difference.

Wd25a had an effective volume of 29 litres, the WD25T produced deeper bass but actually I found the difference surprisingly subtle, bigger differences came from the later crossover updates and the tweeter upgrade.

I noticed a picture of a speaker with a large waveguide on the Seas website, curious because to my knowledge they do not produce them. I wonder how this speaker could perform with a Geddes/Econowave style waveguide, although a26RE4 isn't all that sensitive.
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Old 10th May 2012, 06:56 AM   #48
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Any news?

I just bought a beautifull pair of the original A25 with Palisander cabs, and I think they sound lovely, but a design with newer drivers might sound even better.
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Old 10th May 2012, 02:16 PM   #49
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Originally Posted by burgunder View Post
Any news?

I just bought a beautifull pair of the original A25 with Palisander cabs, and I think they sound lovely, but a design with newer drivers might sound even better.
No. That's my opinion. They are really different. Peter Comeau could never get back to the original crossovers. Drivers are very different then and now. Also the final speaker design. You can also expect big differences in terms of power (W) and high frequency extension with different tweeters. "People" also expect metal cone drivers having similar sound and specs (distortion/harmonics) to paper. So your expectations have no foundation... Your "Classics" are and will be (a gem) beautiful not an "Antique", very much like the classic expensive Kefs.
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Old 13th October 2012, 09:12 PM   #50
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"The second big news for the show is a new loudspeaker kit, which you can say is a resurrection of the old mega success Dynaco A25, and we have named it SEAS A26. We have designed a new Excel T35 dome midrange/tweeter, and combined it with the A26RE4 undercoated paper cone woofer. Our conclusion after several hours of listening: The SEAS A26 is a refined, yet simple and fun loudspeaker, meant for enjoying music to its fullest!"

!!

Click the image to open in full size.

Last edited by saschagabor; 13th October 2012 at 09:17 PM.
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