For your reading pleasure.
Innerworld Audio - My Altec Valencia Iconics
Innerworld Audio - My Altec Valencias - Part II
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For your reading pleasure.
Innerworld Audio - My Altec Valencia Iconics
Innerworld Audio - My Altec Valencias - Part II
Thanks mah!
Valencia fan here. My favorite!
Very awesome articles Marshall, All I can say is when I switched from a normal port to a sorta similar long skinny slots The sound of a speaker pounding inside a box totally went away. They're very realistic sounding now. I bet real Onkens like in the articles would sound even better.
Interesting article on the Valencia.
Is there an easy way to tell the difference between an "Iconic" Valencia and 846A model? What are the differences? From what I've researched, the horns/drivers appear to be identical (806A driver, 811B horn, 416Z 15 in woofer). I've seen the "Iconic" logo on the back of some Valencia's, but had heard that the inclusion of the label did not necessarily indicate the speaker was an "Iconic" model...
Anybody have a good link that explains those Onken port design theory?
I'm not an authority on this but I believe the only difference between the two may be the year of production/labeling. The pair of "Valencias" that I owned said "Iconic" on the label/sticker on the back of the cabs and didn't say the word Valencia anywhere on the speakers/cabinets/labels/stickers. There were built in 1969 and also had "Ling" and "Altec" printed on the label on the back of the cabs. They were 846A Valencias, however, with the 806A h.f. driver, 811B horn, 416Z woofer. Here's what they looked like...Quote:
Originally Posted by Encyclopediabsh
http://www.hostboard.com/forums/hbmc...2009/02/16.jpg
http://www.hostboard.com/forums/hbmc.../2010/08/9.jpg
http://www.hostboard.com/forums/hbmc...2010/03/14.jpg
This is what I knew an Iconic to be until you or someone else here noted it on a Valencia label [824]: http://www.hifilit.com/hifilit/Altec/1957-j.jpg
GM
Some Onken material. Can anyone do a translation of the two L'Audiophile articles?
Onken - Jensen Ultraflex - IP Ultra Bass - IP Ultra-Bass - Studio M
Marshall.
Hi, translations of the articles can be viewed from the following website
Onken 360l Enclosure with Altec 416 drivers
click on an article then use the google translate widget at the bottom.
And if you have any questions that the Google translation doesn't clear up, just ask. I was loosely part of the Revue de l'Audiophile crew back in the 80s. I knew those Onken boxes pretty well.
Wow! I've never seen that early (1957) Iconic speaker before. A totally different animal with a 412 biflex woofer and a 3,000 hz crossover. I'd love to hear one of those.....Quote:
Originally Posted by GM
Pano, thanks for the translations. Lots of interesting information including the take on speaker mounting. Unfortunately nothing on the principle of operation. I recall reading that the Onken enclosure acts like an aperiodic enclosure, a la Jordan.
http://diyaudioprojects.com/Technica...erformance.pdf
Actually in later articles for the Altec 414-8B and the Focal 10" woofer they discuss the Onken being a perfect 4th order bass-reflex. So the same tuning can be used (IMO). Much more math in the later articles. The hard part is figuring out the length of the ports, as they are slot ports and need a correction factor different from tube or flat ports. I have yet to figure out that part.
I have to ask.....
What makes these Onkens so different from the Altec 817 cabinets? :confused2:
Good question. How long are the vents in the 817 cab? Are they deep slots like the Onken? Also the Onken uses near the same surface area for the vents as the woofer cone area. The 817 looks similar, is it?
I don't have any specifics on the build but the concept sure looks the same to me.... :wink2:Quote:
Originally Posted by Panomaniac
http://www.hostboard.com/forums/hbmc.../2011/12/2.jpg
I bet that thing powers itself all around the room with those wheels on it. :DQuote:
Originally Posted by Nipper
Thanks for the pic. Yes, looks very similar indeed. I think the slots are wider than the Onken, but I don't know if that makes much difference. The horn loading would make a difference, of course.
All this dates back to the Jensen Utraflex, the father of both designs.
Here's a fellow in Italy who has Onken/817s
http://www.audiofaidate.org/forum/viewtopic.php?t=2616
Then I guess one could say this Onken guy (or whoever claims to have designed them) is horning in on Altec. :biggrin2: