As there are many iterations of the onken, which one are you referring to? I suspect the smaller ones would work very well NF, but the flange of the TB w5-1611 is likely too large for the chamfered baffle micro/milli/prime. This driver has alot of potential IMO, and deserves a dedicated design. I may just get to work on one.
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Yes - trying to work out the itterations of the Fonken familly. Basically the Prime I think:
http://www.diyaudio.com/forums/full-range/88557-new-fonken-pair-born.html
What would be required to work out the sizes - I found a calculator link on a thread here - but 'tis dead.
I also believe there is potential, but limited budgets mean I can't really experiment that much.
Fonkens are just so NICE!
http://www.diyaudio.com/forums/full-range/88557-new-fonken-pair-born.html
What would be required to work out the sizes - I found a calculator link on a thread here - but 'tis dead.
I also believe there is potential, but limited budgets mean I can't really experiment that much.
Fonkens are just so NICE!
Using WinISD, the W5 looks pretty good in an 18 liter box, F3 at 50Hz. With 6 vents, each one would measure 100mm x 9.0mm x 283mm long.
BTW, this is Q3B tuning, not real Onken tuning.
jeff
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Excellent.
If I can ask, would the panel width and be the same 12mm / 1/2inch for the larger 18ltr cabinet? (and wool felt thickness)...
.....Actually, I have just been looking at the fonken plans, and realise i't's not just a case of altering the internal volumes and internal "walls" (vent length?).
Well, I'm still very keen to give it a go.
t
gril
Actually, the Fonken isn't a 'real Onken' either. The Onken can trace its lineage back through the Jensen Ultraflex to Thuras's original BR, & it's principle goal is to use its massive vent system to provide maximum efficiency at Fb. Dave's Fonkens, despite their similar appearance, use their high aspect ratio vents to provide something more akin to an aperiodic alignment.
At a fundamental level, all vented cabinets are tuned by altering their Vb and vent dimensions to achieve a desired tuning alignment with a given drive unit. Whether that merits a 'just' is rather more open to question though, as this, except in the case of drivers which are drop-in replacements for one already used in a given enclosure, essentially means 'design a new cabinet from scratch.'
At a fundamental level, all vented cabinets are tuned by altering their Vb and vent dimensions to achieve a desired tuning alignment with a given drive unit. Whether that merits a 'just' is rather more open to question though, as this, except in the case of drivers which are drop-in replacements for one already used in a given enclosure, essentially means 'design a new cabinet from scratch.'
Well, Ive tried the following tools: BassBox6, WinISD (seems well used here) , the Onken XLspreadsheet calculator, and a 3D package (maya) and I can't get any of the numbers to work. Not bad for a noob!
Mainly it comes down to fitting the vents in and still having enough width on the baffle. Can get either one, but not the other. Ive been squishing 3D boxes until my eyes bleed.
...Now I realise I could ......ok.... am missing many things here, but I can't see a way of making it fit.
Balls : )
Tog.
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Shouldn't be that big of an issue with ~285mm long vents. I'll play around with the box dims for a bit.
jeff
Cool!
Ok, so after a bit of futzing around we have a box. Internal vol. is ~20L + 1.5L for the vents, minus ~1.5L for the brace and driver motor (guessing here). Included is a crappy layout drawing.
jeff
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Cool!
Included is a crappy layout drawing.
jeff
Cool x2 and I'm sure a lot more.
Blimey, thanks Jeff - I only got it working at 25+ litres.
I could and just might make a cardboard mock up of this on saturday, time permitting.
t
gril
Hi all - so built a mock up of the 20ltr onken type thing, supplied by Jeff. (see attached images). and hooked it up to a daytona T100a and an iphone.
Bear in mind....it's cardboard + I have no testing equipment save a mulitmeter (is that usefull?)
There is promise here. Although the speakers are so new - and do sound a little " 1 dimensional" (run them in?)
Maybe I am too used to multi ways with their discreet fequencies.
Definitely some "shout" in theses, especially when listening to Joni Mitchell (shout scream wai!l).
good for ennio morricone.
great for the stranglers.
good for zappa.
Would be hoping for more bass response + "punch" with wood.
er...now what?
Togril.
Bear in mind....it's cardboard + I have no testing equipment save a mulitmeter (is that usefull?)
There is promise here. Although the speakers are so new - and do sound a little " 1 dimensional" (run them in?)
Maybe I am too used to multi ways with their discreet fequencies.
Definitely some "shout" in theses, especially when listening to Joni Mitchell (shout scream wai!l).
good for ennio morricone.
great for the stranglers.
good for zappa.
Would be hoping for more bass response + "punch" with wood.
er...now what?
Togril.
Attachments
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Build another box of course. Run them in for a while using the cardboard boxes. Then decide if real wood boxes are in order.
BTW, nice work with the cardboard.
jeff
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