Onken box for Fe206 ...

[mark_titano]

What do you think about this box?

http://cgi.ebay.de/Oncken-Gehaeuse-f...QQcmdZViewItem

The designer is the same one of the replikon, even if that onken boxes doesn’t appear in the main site

http://www.klangform-akustik.de/

Mark

[MPM]

I guess they call it the "Cube" for a reason. Its just to square for me. Personally I prefer a taller rectangle cabinet. It reminds me of

http://home.hetnet.nl/~geenius/Solo103.html

[Landroval]

What does Onken actually mean? Is it only a name?

[mark_titano]

Yes, cubic shape is not exactly the best solution for stationary waves.
I’m not skilled with onken boxes, have someone used them with fostex fullrange?

Landroval, onken is not more than a Jensen Ultraflex, look here:

http://www.studiomaudio.com/onken.html

Mark

[Scottmoose]

What do I think: Oh Dear is the answer.
You said it Mark -a cube is hardly the best shape when it comes to suppressing standing waves. I can practically hear that reflected sound from the rear-enclosure wall coming back through the driver. Vile.

Scott

[mark_titano]

Ehehehe...

Let me try to explain: I'm not precisely interested with that cabinet, what I’d like to discuss is if an onken box can be a good solution for fostex Fe series. The reason is quite simple: I want to try one of that speakers (probably the fe167) in a bookshelf enclosure and I’m trying to investigate, due to the fact that I’m not so skilled both in speakers design and fullranges, if there is any reason to use an onken load instead the standard fostex vented boxes.

Now, put the cubic box aside for a minute… which are the pros and cons of onken's enclosures? There is, out of all the FE series, a speaker that should be able to work in that box better than in its vented one? And maybe, better than all the other in their own vented box?

Mhmm I hope that what I’ve wrote result understandable …English is not my strong point

Mark

[Landroval]

I dont see any difference between onken and normal vented box. Maybe the box is a little stiffer because of the 'double' walls, but that's it.

[Dumbass]

An Onken is simply a different way of venting an enclosure.

FE206E would require at least 4 ohms series resistance to make it suitable for a vented enclosure.

I have a FE207E in a 45L vented cab tuned to about 40Hz, it needs 2 (or 3?) ohms series resistance to align correctly. It still has some of that bass reflex "boom", but not obnoxiously so.

[zobsky]

Originally posted by Landroval
I dont see any difference between onken and normal vented box. Maybe the box is a little stiffer because of the 'double' walls, but that's it.

an "onken" bass reflex has a larger port cross sectional area than a normal circular reflex port, resulting in lower vent speeds and hence less vent noise

[Landroval]

Originally posted by zobsky
an "onken" bass reflex has a larger port cross sectional area than a normal circular reflex port, resulting in lower vent speeds and hence less vent noise

I was expecting this.

1) You can make the normal vents as big you want. For a sub even 0.5*driver diameter is not exagerrated.

2) With a fullrange driver it's very hard to reach the nominal limit of 17m/s air velocity even with normal sized ports.