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09-08-2011 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 1
Post ID: 16978
Reply to: 16978
Aries Cerat Contendo - the newest "fat" kid in the block....
fiogf49gjkf0d

I have no idea what it is but it is something… Take a look:

http://cybwiz.blogspot.com/2011/09/aries-cerat-contendo-reference.html

It is 3 way horn loaded with external LF section, so far so good.  Atop then have RAAL ribbon that most likely hided in that appendix atop.  Some kind of midrange loaded into 350Hz Tractrix, which is fine. They said 4” midrange that it probably the side of the diaphragm not the exit. They clime the 118dB efficiency, this is VERY bad. I am afraid that it is BMS drivers, sad indeed.  In upperbass then have 8-inch driver loaded to look like put 100Hz horn. That is very cool as it is not our standard 36” horn but it looks like 40-45” – very bold move…. The housing of the driver is also very slick, sort of the La-horn negative opening melted with Bang & Olufsen home décor. It looks like the channels are time aligned- wish is an indication that the makers are not idiots. I wonder who are they, does anybody know about this company?

My only criticism is that I would like the MF to be in the same vertical axis – very hard to do with this midbass. I would like to have the bottom of the midbass to have a cord to cut off and to have flat bottom. It would save 4-5” and might, just might to let to put MF above. I think it still will be too high bit from 10” it might work out.

Anyhow, I think it was an interesting take.

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
09-09-2011 Post does not mapped to Knowledge Tree
jessie.dazzle


Paris, France
Posts 456
Joined on 04-23-2006

Post #: 2
Post ID: 16981
Reply to: 16978
Virtual fat
fiogf49gjkf0d
http://www.aries-cerat.eu/
(Curiously, the "Contendo Reference" is not listed under speakers but has it's own tab)

Seems to be primarily an amp maker looking to branch out into speakers and custom audio installations. The image of the "Contendo" looks like it was rendered from CAD data (probably using Hypershot), in which case it's not too late to chop the bottom off the mid-bass horn and get it pointing straight out instead of being angled slightly up.

Edit: I take that back; the image may still be a computer rendering but looking further at the site, I see that they actually did make at least one "Contendo". I didn't and don't get the sense that the mid-bass horn is larger than 38"...

From their site:

"
The midbass horn enclosure measures 120cm in diameter "

I take that to mean that the enclosure (the egg, not the horn) measures 120cm or 47"; my guess is that they used a 115Hz (38" diameter) horn.

They do have one other speaker, the "Gladius" listed on their site; a 3-way direct radiator design. Nice looking but note the large expanse of hard, shiny material surrounding the HF driver and the pointed phase plug-like dust cap on the woofer; yes it might be intended only as decoration but it is also quite possibly used for mass-loading. It seems to be an earlier design, so we might assume they have learned some since then.

jd*


How to short-circuit evolution: Enshrine mediocrity.
09-09-2011 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 3
Post ID: 16983
Reply to: 16978
Stavros Danos from Cyprus....
fiogf49gjkf0d

I asked Alex who got those tweeter from him and he said that it was Stavros Danos from Cyprus. So, it was the Greek guy that we have meet before on the pages of my site:

http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=12129#12129

It looks like he formed a new company somewhere within the Cyprus:

http://www.aries-cerat.eu/

If you click on the 5th tab then you arrive to the “Contendo Reference” page. Let look what we have in there:

The Alex’s ribbon tweeter with amorphous core transformers and fast opening horn with continued its flare back. This is good. For claimed unparalleled performance I would like to see the “thinner” version of Alex ribbon but we do not know what MF driver they use and where they cross it. Let presume that they did the right thing for what they did optimized the tweeter to work fine with their MF.

The Mid range channel:

 “Using a highest quality compression driver, with 4’ titanium diagram  as our mid frequency reproducer ,requires nothing less than a perfect flared horn. We use a 350hz tractrix horn, o load the driver from 700 to 3000hz, and taking the flare back to 360o building the horn in our solid wood bullet shape enclosure ,we completely removed diffraction as an issue. Efficiency is 118db/W and is attenuated via a impedance matching transformer to 104db/w”

OK, I see, they use the MF up to 3K and then plug in the tweeter.  This is a big mistake in my mind as the ribbon tweeter does not do too well tonally in MF. Again, in my mind and opinion of the Cyprus folks might be different. I do not care about tonal quality of ANY ribbon and I would like ribbons to be used at the very top, over 8-9K where there is little or no tone. There is a positive side in what Cyprus guys did. With 3K of crossover point the negative aspect of sound deriving from the vertical offset of the MF will be substantially minimized and masked out by the tweeter output.

The Midbass channel as they call. I call it the Upperbass channel.

“Most horn speakers, use direct radiating drivers for midbass reproduction. We feel that anything less that a hornloaded driver would compromise the total project. Midbass is the base of the music, in all genres. In order to cover the 110 to 700hz range we use a full size round tractrix horn, loaded with a powerfull ultralight  8in driver,with a super strong motor and a total moving mass of just 13gr , giving unbelievable detailed and defined midbass . The tractrix flare also continues at 360deg  ,and is build in a massive wooden bullet shape enclosure, in order to perfectrly terminate the horn flare, so that diffraction is not an issue here as well. Efficiency is an astonishingly 115db/w and is attenuated via an impedance matching transformer to 104db/w .No direct driver is capable of delivering the sheer impact, detail  and energy and that horn delivers in an ease. The midbass horn enclosure measures 120cm in diameter “

I would question if the conical fare on the back make any indifference for Upperbass but it certainly goes alone with the entire speaker design. There is something fishy in there. If the horn it tractrix then with throat of 3-5” it will do here and there no more than 6dB gain. They claim 115dB sensitivity that means that they have 109dB driver in there. Well, it would be possible, unlikely but possible to make 8” driver that will push 109dB but it would be very upper range driver. They have 100Hz horn, it means that the primary open air resonance of their driver somewhere around 80-90Hz. The 90Hz 8” driver that is able to do 109dB shall have 20 inch excursion.  The pressure of driver is surface by excursion. If they have 8” driver that able to do 100Hz then can you imagine how far it shell excerpt in order to press 109dB. Well, at least I do not know such drivers…. It would be possible to hit that number if they have 8” driver blowing into 1” trout and super long exponential hold but it is not the case with the Cyprus speaker. Anyhow, regardless the numbers that I do not believe the fact that they went for full 42” horn and 100Hz is a good sign.

The bass module that they have – dual 15” sealed boxes with own amplification is fine. Of close I am not wild about the class D output stage but the fact that they went for own amp that meant to be used with their speaker I find is very stimulating.

I would not propose how this speaker would sound. In my estimation, even it has some things that I do not like but I sound the design is well balanced and one of the few examples of contemporary rational thinking. Considering what those Cyprus folks did in the past and some other development in the rigion it looks like Greece is becoming a new micro-epicenter of horn building jointing USA, Germany and France.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
Page 1 of 1 (3 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  A Moscow setup with Horns/Lowther..  A new reiteration of the Moscow setup....  Horn-Loaded Speakers Forum     33  232975  02-27-2011
  »  New  A horny newcomer: Pink Faun Euphrosyne..  A horny newcomer: Pink Faun Euphrosyne...  Horn-Loaded Speakers Forum     0  17206  11-26-2007
  »  New  A new kid in the block: Sadurni Acoustics..  Axpona 2015...  Horn-Loaded Speakers Forum     21  81381  08-22-2011
  »  New  About beauty and ugliness of horn speakers...  And of course there is always something like this…....  Horn-Loaded Speakers Forum     2  22536  09-21-2009
  »  New  RAAL “Water Drop” tweeter for Macondo...  Your comment takes me by surprise...  Horn-Loaded Speakers Forum     77  667802  02-16-2007
  »  New  Aporia - Silbatone Acoustics speaker..  Silbatone and WE in Germany or hi-fi barter....  Horn-Loaded Speakers Forum     103  640501  01-10-2009
  »  New  Greek Anima Loudspeakers..  I wish the TuneAudio stay with whatever subs they do....  Horn-Loaded Speakers Forum     32  132497  11-03-2009
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