Good afternoon. So am looking at building a Onken box but, see there is a lack of calculators and spreadsheets available on line. How do I calculate the 3 slim ports on each side of the box to the right frequency tuning? I hope am not missing something or over looked info on the internet? Thanks Jeff
There was a "real" Onken Excel spreadsheet floating around the internet years ago. Someone probably has a link to it on the forum. I had it loaded on my old computer, which is no longer alive. 🙂
What's the intended driver?
jeff
What's the intended driver?
jeff
Yeah and I did a bunch of corrections, upgrades, but it's in two fried HDs and only remember it being in some place brand new/free on the net, so time wise guessing Google Spreadsheets...........
An Onken is a reflex with vents down the side.
You can use this to convert a regular vent to slots. https://p10hifi.net/FAL/downloads/Changing-Port-Size.pdf, the conversion is built into my reflex modeler.
If too narrow you start getting additional R in the vent which pushes the box aperiodic and you have a different alignment. Too long can cause issues with a vent-length resonance.
A traditional Onken has bass-shelf tuning, more and more are smaller maxFlat alignments.
dave
You can use this to convert a regular vent to slots. https://p10hifi.net/FAL/downloads/Changing-Port-Size.pdf, the conversion is built into my reflex modeler.
If too narrow you start getting additional R in the vent which pushes the box aperiodic and you have a different alignment. Too long can cause issues with a vent-length resonance.
A traditional Onken has bass-shelf tuning, more and more are smaller maxFlat alignments.
dave
Read post #32 in the linked thread: https://www.diyaudio.com/community/threads/help-with-tuning-onken-enclosures.425429/page-2
If you just want the Onken "look", then that's a lot more straight forward.
jeff