Onken Calculator

[minhaj]

Hi GM
Hi other members

Somewhere I have seen your (GM's) version of Cyr-Marc 2000 calc. Can you post it here again?

After lurking around I have finally made up my mind to go 3 way, ONKEN for bass, 800/900/1000-10K in Le cleac'h horn with compression driver and a super tweeter above.

From my country we can not buy anything online, so managing a pair of 414 is nearly impossible. Great Plain is very expensive for me, specially so when air fair is considered. Is there any alternate which is also not so expensive?
Kappa 12a is a candidate with some added series resistence, how much?? I want to build the petite Onken enclosure with zero change cause when I get a pair of 414 readily I will put them in.

Regards

Regards

[minhaj]

please hold my hand else moving forward is difficult for me

regards

[MartinV56]

ONKEN_CALC

[GM]

Greets!

Hmm, don't recall seeing this and now many months old, so did you find it elsewhere or design/build something different?

GM

[minhaj]

Hi GM,

I have not built anything else as yet.

I think Eminence Delta 12A is a compromised candidate for petite onken box should I consider Rg at 3.5 ohms and S vent at 75% of SD. My calculation shows Vb total as 217L. whereas Petite Onken Vb total is 224L and L' vent 34.225cm. Would you pls confirm this.

For the mid horn I want to clone this:Round Tractrix Horns, but fostex D582 is expensive for me. Can you tell me about some cheaper alternative 2'' cd?

Regards

[minhaj]

Sorry I forgot to tell you that my amplifier is home brew 300bse with 2.5 ohms z out.

Regards

[GM]

Greets!

Sorry, don't keep up with driver brands, prices other than Altec/GPA, so 1.4" exit is the largest compression driver I'm familiar with.

Ooh..... 300B, lucky you!

Anyway, assuming the 12A's published specs are reasonably accurate, then combined with the amp's 2.5 ohms, it looks 'close enough' to fit the Petite as drawn in a ~n = 5.7 alignment and mildly misaligned with a probably inaudible [or euphonic at worst] low Q peaking ['bloom'] in the upper bass at 3.5 ohms.

GM

[minhaj]

Thanks GM for confirming 12a usage in petite onken cab. It was an insparation for me.

May be somebody can guide me for a reasonably priced 2'' CD for 8000/1000Hz-up ranges and an appropriate crossover for a 3 way??

Regards

[GM]

You're welcome!

I assume you mean 800-1000 Hz, though again, no clue other than pointing out this listing: 2 INCH HORN DRIVERS from Parts Express ship same day and come with 45 day money back guarantee. Free Shipping Available. Order free 10,000 product catalog.

GM

[Helmuth]

Originally Posted by minhaj

Hi GM,

I have not built anything else as yet.

I think Eminence Delta 12A is a compromised candidate for petite onken box should I consider Rg at 3.5 ohms and S vent at 75% of SD. My calculation shows Vb total as 217L. whereas Petite Onken Vb total is 224L and L' vent 34.225cm. Would you pls confirm this.

For the mid horn I want to clone this:Round Tractrix Horns, but fostex D582 is expensive for me. Can you tell me about some cheaper alternative 2'' cd?

Regards

Eminence has a cheep 2"

Fatialpro has very nice cheep 1,4" and also the 1.4" horn of fatial pro is cheep. together about 250 euro. No need for supertweeter.
The fatial pro is from 500Hz-20kHz
You want to build a onken no need to you can have better results with a openbaffle.

I made a openbaffle that does -3dB 30-35Hz 94dB 1Wmtr with 2 15" drivers. And place it 1,2 to 1,5 mtr from the backwall great sound even down to 20Hz. This makes the lowest group delay(like a closedbox) and low frequency extension with compact design I know.
Look at I thought the eminece delta 15". Use 2(Rv=4OHM) or 4 (ripol Rv=8Ohm). (I use the dipool low with kugelwellen midhigh horn for my PSE kt66 hybird tube amp.)

Drawing of a ripol design dipool.