Onken for Fostex FE166En

[ziocalepino]

Hi people, any idea for plans to build Onken for Fostex FE166En? I've heard them sound and look great!
Thanks all,
Z.

 

[vinylkid58]

You need FE167e (One Sixty Seven) for Onken style enclosure.

jeff

 

[planet10]

FE166En really wants a horn...

dave

 

[moray james]

Hey Dave: remember I had pretty good results with a FE166e in my K-line (hybrid Karlson) so that is a possible option that is smaller than a horn. All the best Moray James..

 

[planet10]

Yes i remember that one -- i knew it was the subject as soon as i saw your name 🙂 ... (someone said an HD crash ate your copy of the plans?). I also seem to recall you saying it did a bit better with FE167?

dave

 

[ziocalepino]

I've already built a horn for 166, Fostex' original, but after having heard Onken's one... well I'd like to try! As seen in few uncomplete picture on the net Onken seems similar to Solo-166 project. Isn't it? Anyway, has anybody Onkens plans?

 

[GM]

You need FE167e (One Sixty Seven) for Onken style enclosure.

Why? Driven with a high output impedance or adding some series resistance allows a F3 = Fs Onken without exceeding the vent length limit and you still have whatever 'sweetness' this driver may have over another.

GM

 

[vinylkid58]

Hey GM.

Why? Driven with a high output impedance or adding some series resistance allows a F3 = Fs Onken without exceeding the vent length limit and you still have whatever 'sweetness' this driver may have over another.

Not such a bad idea if efficiency isn't an issue. I added 6 ohms of series R, but system eff. is down a little over 4dB. I also used n=5.7, just to make things easier.

jeff

 

[zman01]

Was looking for a few other options for my FE166ens besides the BIBs in which they are in. Googling brought me to this thread.

Did anybody end up building a Fonken with the FE166en?

Any feedback suggestions will be appreciated.

Thx, Zia

 

[planet10]

anybody end up building a Fonken with the FE166en?

I just simmed one. F3 ~110Hz, F10 ~86 Hz.

Might as well put it into a butterworth 5.3 litre sealed box and XO to a woofer (150 Hz XO (3rd order acoustic)).

dave

 

[chris661]

Use a valve amp of sufficiently high output impedance (or add series resistance to one of lower output impedance), and you should be able to get more extension than that.

While it might seem a crude measure, re-using cabinets for the FE**7 series with a FE**6 driver and a resistor seems like something to try.

Alternatively, Variable Amplifier Impedance - that'd keep the driver sensitivity otherwise lost by the resistor.

Chris

 

[planet10]

Tried that, didn't like it (series R)

dave

 

[freddi]

hopefully 166EN will like this K6.5 (middle enclosure) - JL has it loaded with 167 and is awaiting 166 - the 8" enclosure to the left is supposed to sound very good with FE206EN and will keep up with the big K (and beat it for coherence and vocals, etc) IIRC external bulk for the 6.5" K-coupler is ~1.7 cubic feet

An externally hosted image should be here but it was not working when we last tested it.

GregB. designed the "SK6.5"

An externally hosted image should be here but it was not working when we last tested it.

 

[zman01]

Look fwd to hearing how the 6.5" K-coupler does with the FE166en.

 

[zman01]

Hi Freddi,

Any update on results with FE166EN?

 

[freddi]

the little coupler in the middle with 167 might do F10 at 50-55Hz with 166EN - my buddy is going to tweak its vent first - that's a FE206EN in the left Karlson type-coupler

An externally hosted image should be here but it was not working when we last tested it.

Green = Z with 167, Blue = 166

An externally hosted image should be here but it was not working when we last tested it.