Yes, that's expensive!! Do they have a website?
GM. thanks for the illustration. I wonder if the Onken vents aren't nearer the lower right corner example at K=2.2 It would be nice to see an impedance plot from a box of known size. That should reveal Fb and the port correction factor could be deduced from that.
From the original plans I see the big Onken box as 317L gross volume, ports included. Or 289L if the ports are excluded. How much volume does the 416-A eat up?
Vent surface area is 850cm2and 40.5cm deep. Port area is equal to 6x round vents of 13.43cm diameter if the software won't do square ports.
GM. thanks for the illustration. I wonder if the Onken vents aren't nearer the lower right corner example at K=2.2 It would be nice to see an impedance plot from a box of known size. That should reveal Fb and the port correction factor could be deduced from that.
From the original plans I see the big Onken box as 317L gross volume, ports included. Or 289L if the ports are excluded. How much volume does the 416-A eat up?
Vent surface area is 850cm2and 40.5cm deep. Port area is equal to 6x round vents of 13.43cm diameter if the software won't do square ports.
Hi everybody
Thanks a lot for all these very interesting treads and hopefully there a lot more soon.
@EBA
This sounds very interesting (ok, very expensive too!) Could you make somme pictures for us and try to explain what are the basic differences between the EMS, Altec and Supravox (which seems to be a good speaker as well).....
Thanks
Thanks a lot for all these very interesting treads and hopefully there a lot more soon.
@EBA
This sounds very interesting (ok, very expensive too!) Could you make somme pictures for us and try to explain what are the basic differences between the EMS, Altec and Supravox (which seems to be a good speaker as well).....
Thanks
If You are going to spend that kind of money why not look into Wolf's Kilimanjaro series Altec field coils ! 😀
A416WVL | Kilimanjaro-Series | Wolf von Langa
Hey guys, I've always wondered what's so special about the onken cabinets? And how different are they from a traditional bass reflex?
Links to information would be fine too. Thanks!
I'm about to build a box for a 421 and trying to finalize the cabinet.
Links to information would be fine too. Thanks!
I'm about to build a box for a 421 and trying to finalize the cabinet.
That's a good question and there have been various answers to it over the years. Honestly I think the ones I've heard* have just been very well built big boxes with large port surface. Hard to go wrong there.
Dave's much smaller Fonkens also sound nice, so there may be something to the structure and the port arrangement.
*Grand Onken (416-8A), Petit Onnken (Altec 414), Mini Onken (Focal 10")
Dave's much smaller Fonkens also sound nice, so there may be something to the structure and the port arrangement.
*Grand Onken (416-8A), Petit Onnken (Altec 414), Mini Onken (Focal 10")
I've been doing some reading and thinking about the Onken and hope to simulate it in a standard box program like Unibox. Having impedance plots of known Oken builds would be very helpful to the reverse engineering. So far I have not found anyone has has these plots.
However, reading the original article on the Petit Onken (Altec 414) it contains a wealth of detail and calculations that the large Onken article does not. The Mini Onken with the Focal 10" driver is also very detailed. It may be possible to work out a few factors from these old articles.
Some measured impedance plots would go a long way, tho.
I hope to get some use out of this, as the Ultraflex/Onken style box continues to generate interest, but finding suitable modern drivers and tuning the ports has not been easy up to this point.
However, reading the original article on the Petit Onken (Altec 414) it contains a wealth of detail and calculations that the large Onken article does not. The Mini Onken with the Focal 10" driver is also very detailed. It may be possible to work out a few factors from these old articles.
Some measured impedance plots would go a long way, tho.
I hope to get some use out of this, as the Ultraflex/Onken style box continues to generate interest, but finding suitable modern drivers and tuning the ports has not been easy up to this point.
Hello,
Firsthly, ALTEC, 416A,-8A,-8B,-8C/ 515,B,C,E and SUPRAVOX 400-2000 EXC and EMS B15 EX are all very good speakers.
But if you want respect the ONKEN 360 dimensions cabinet and the K facteur and n alignment only several speakers can be mounted.
For me, there are :
416-8A with 4 original vents and alignment insn't the better, FA (acceleration factor) 227, EF 96 db
416-8C with the vent height : 24.33 cm and good alignment, FA 235, EF 96 db
SUPRAVOX 400-2000 EXC is good with excitation votage arround 13 V, FA 266, EF 97 db. be careful of the hight excitation intensity.
B15 EX is good, FA 280 and the best efficiency 97.89 db and very low distorsion.
And the big avantage of the B15 EX and 400-2000 EXC you can adapte the parameters of the room.
ElectroMagnetSpeaker web side : www.emspeaker.com
Firsthly, ALTEC, 416A,-8A,-8B,-8C/ 515,B,C,E and SUPRAVOX 400-2000 EXC and EMS B15 EX are all very good speakers.
But if you want respect the ONKEN 360 dimensions cabinet and the K facteur and n alignment only several speakers can be mounted.
For me, there are :
416-8A with 4 original vents and alignment insn't the better, FA (acceleration factor) 227, EF 96 db
416-8C with the vent height : 24.33 cm and good alignment, FA 235, EF 96 db
SUPRAVOX 400-2000 EXC is good with excitation votage arround 13 V, FA 266, EF 97 db. be careful of the hight excitation intensity.
B15 EX is good, FA 280 and the best efficiency 97.89 db and very low distorsion.
And the big avantage of the B15 EX and 400-2000 EXC you can adapte the parameters of the room.
ElectroMagnetSpeaker web side : www.emspeaker.com
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