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Old 7th November 2006, 02:10 AM   #761
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Keep in mind that the squish & stretch on these last 3 will have unknown affects on the performance.

dave
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Old 7th November 2006, 10:06 PM   #762
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Quote:
Originally posted by planet10
Keep in mind that the squish & stretch on these last 3 will have unknown affects on the performance.

dave
post # 734

http://www.diyaudio.com/forums/attac...amp=1158605101


is the one whose measures I can't locate.


But these other designs are pretty spanky as well.
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Old 8th November 2006, 07:37 AM   #763
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Those are Scott Dunn's (scd) variation on the Bi-Fonken. His latest comment "I got my Bifonkens hooked and playing. They are really nice. The treated drivers make a huge difference."

I've started to call them flat-face Fonkens & will probably draw the variation as they remove the step where you have to run the box thru the table-saw to get the 45 on the front.

In theory, there will be a negative affect on the edge diffraction, but if it is the difference between buidling or not building a Fonken i can live with it.

The only change is to ensure that the ports are adjusted to maintain the same length

dave
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Old 10th November 2006, 11:25 PM   #764
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Default Hey those look familiar

Did someone ask about my bi-fonkens. I did some modification to Daves drawings to come up with a presentation style I liked more than the sliced edge style.
I kept the critical stuff the same as Davids design but I used a 1 inch round over and adjusted the internal port length to compensate. I essentially doubled the single fonken design. Mine are made from solid fine grained Douglas-fir.
I am not sure if there is a problem with defraction due to the round over edge vs the cut off edge as these are bi-poles. There may be something there that some may get fussy about I just like the look, and they sound good to me.
The stands are custom made from polished granite and aluminium tubing (both fun materials to work with). Stand height is to ensure the drivers are at ~ 36 inches from the floor, cause that is where my ear is when I am sitting on the coach (just before I fall asleep). I have a small commercial sub that I use to augment below 80 cycles. I keep the sub turned dow low so it does not over power things. I am real happy with these and my wife likes the look, so all is good right now.

The only issue I have is that I have too many sets of speakers in the living room and the furniture is getting in the way.

I will take my camera home this weekend and get a few in the living room shots. It looks like a cold rainy weekend here so I will be gooving to some sweet blues this weekend.

Nuff said for now
I hope this helps
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Old 12th November 2006, 09:23 PM   #765
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SCD,

I'll look forward to any additional shots esp. showing
the backside and additional details, plus measures.
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Old 21st November 2006, 10:08 PM   #766
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Default Pics of my bifonkens

Okay here is picture in the living room. All dressed up singing gently. I purchased a nice little SE EL84 when I was in China and hooked it up last night. My what a great combination. I have been listening to some vinyl from the old days and really enjoying things a lot.
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Old 21st November 2006, 10:10 PM   #767
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Another angle
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Old 21st November 2006, 10:11 PM   #768
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Those look fonken excellent.
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Old 21st November 2006, 10:16 PM   #769
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Hello Lonn:
I am not sure what you are needing in the way of measurements. I followed the design from David keeping all the internal measurement constant. I used 3/4 inch material so I had to adjust for that a bit. I used a Radio Shack terminal block. Here is a shot of the internal brace I made from 1/2 inch plywood. If there is something else you need to know ask and I will try and help.
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Old 21st November 2006, 10:16 PM   #770
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Looking good scott, keeping busy working on wood projects


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