Full Range Speaker Photo Gallery - Page 52

bobhayes · 17th March 2007, 06:08 AM

Here is a picture of my latest project. Fostex FE 206E drivers, back and front loaded horn cabinet.
It's still in it's test stage, with only about 6 or 8 hours on the drivers, so no nice finish yet.
I've named them 'S giger' as the back horn follows a path which is s shaped, and my wife says they resemble sculptures by the artist HR Giger (creator of the alien).
Things to do:
1. Experiment with the front horn 'wings' to finalise the shape and size.
Currently, the transition from bass to midrange sounds quite smooth, with a crossover frequency of around 250 Hz.
2. Kill a peak in response around 2.6kHz. I'll play with phase plugs later. My experimental plan is to try a hollow pipe around 33mm from the V.C. front to the termination of the pipe, corresponding to 1/4 wave length of the peak. Theoretically, this should hopefully have a mild TL effect on the whizzer (or maybe it won't). Worth a try though!
3. Give them a nice finish. I'll try my hand at faux bois (fake wood),as I can't afford the real thing in the quantities required!

planet10 · 17th March 2007, 06:43 AM

bobhayes · 17th March 2007, 08:11 AM

Internal picture during construction.

planet10 · 17th March 2007, 08:42 AM

As i imagined when i looked at it... this will be much easier to do a 3D SketchUp than the Dalek (i'm still thinking about how to "bend" the side panels.

dave

gychang · 17th March 2007, 11:44 AM

Quote:

Originally posted by bobhayes
Here is a picture of my latest project. Fostex FE 206E drivers, back and front loaded horn cabinet.
It's still in it's test stage, with only about 6 or 8 hours on the drivers, so no nice finish yet.
I've named them 'S giger' as the back horn follows a path which is s shaped, and my wife says they resemble sculptures by the artist HR Giger (creator of the alien).
Things to do:
1. Experiment with the front horn 'wings' to finalise the shape and size.

it is fabulous, any chance on more details on how to duplicate your design etc?

gychang

bobhayes · 17th March 2007, 01:39 PM

gychang,

I would say it is very early days WRT development of this design.
When I get it to function 'just so', then maybe Dave (planet 10) might consider a page for it at frugal horn.
It's a bit rough around the edges at the moment, and both the compliance volume and front horn need properly tuning.
When I get to a good level of performance, I'll give the details to Dave, and maybe (if he has the time), he might draw some proper plans (as opposed to my books of scribbles and numbers). Dave?
If anyone wanted to build these, I would suggest that they are not for the faint hearted. There are around 100 pieces in each speaker, of which most of them are cut with a chamfer to create the curves, like the hedlund or dalek curves. Not difficult, but assembly on this scale is very time consuming. The complexity, and the fact that they are an unknown quantity would put off all but the craziest of DIY'ers. gychang... are you crazy?!

Dave, Would you be interested in another design for your site? Maybe the incredibly busy scottmoose might help with the sims again, although I don't know whether the mathcad can do such complex sims or whether he would have the time either?

rcavictim · 17th March 2007, 04:05 PM

bobhayes,

Very impressive work. The design is very nice as a piece of art . I agree with your statement about the prototype construction....`not for the feint of heart`. There are wooden cylinders and half cylinders made of plywood available that could be used if someone wanted to save time duplicating these.

planet10 · 17th March 2007, 06:59 PM

Quote:

Originally posted by bobhayes
When I get to a good level of performance, I'll give the details to Dave, and maybe (if he has the time), he might draw some proper plans (as opposed to my books of scribbles and numbers). Dave?

That is the plan...

and i'm sure Scott will do sims...

dave

bobhayes · 17th March 2007, 11:13 PM

Thanks for the compliment rcavictim. I know there could be several approaches to construction, particularly thin ply layers. I just find it easier to glue bits together thanany other method.
Should we move to another thread, as I hate filling up the photo thread with waffling text!

Fuling · 18th March 2007, 02:11 PM

My FE167E OB speakers, finished (well, not quite finished yet) an hour ago. 1200 x 660 x 16mm massive oak:

17th March 2007, 08:42 AM	#514
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	As i imagined when i looked at it... this will be much easier to do a 3D SketchUp than the Dalek (i'm still thinking about how to "bend" the side panels. dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

17th March 2007, 04:05 PM	#517
rcavictim diyAudio Member Join Date: Jun 2004 Location: Cool end of a soldering iron NW of Toronto	bobhayes, Very impressive work. The design is very nice as a piece of art . I agree with your statement about the prototype construction....`not for the feint of heart`. There are wooden cylinders and half cylinders made of plywood available that could be used if someone wanted to save time duplicating these. __________________ I.Q.Test. Have you ever purchased a recreational snowmobile?

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17th March 2007, 06:43 AM	#512
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5

17th March 2007, 01:39 PM	#516
bobhayes diyAudio Member Join Date: Sep 2004 Location: Bungawalbyn, NSW	gychang, I would say it is very early days WRT development of this design. When I get it to function 'just so', then maybe Dave (planet 10) might consider a page for it at frugal horn. It's a bit rough around the edges at the moment, and both the compliance volume and front horn need properly tuning. When I get to a good level of performance, I'll give the details to Dave, and maybe (if he has the time), he might draw some proper plans (as opposed to my books of scribbles and numbers). Dave? If anyone wanted to build these, I would suggest that they are not for the faint hearted. There are around 100 pieces in each speaker, of which most of them are cut with a chamfer to create the curves, like the hedlund or dalek curves. Not difficult, but assembly on this scale is very time consuming. The complexity, and the fact that they are an unknown quantity would put off all but the craziest of DIY'ers. gychang... are you crazy?! Dave, Would you be interested in another design for your site? Maybe the incredibly busy scottmoose might help with the sims again, although I don't know whether the mathcad can do such complex sims or whether he would have the time either?

17th March 2007, 11:13 PM	#519
bobhayes diyAudio Member Join Date: Sep 2004 Location: Bungawalbyn, NSW	Thanks for the compliment rcavictim. I know there could be several approaches to construction, particularly thin ply layers. I just find it easier to glue bits together thanany other method. Should we move to another thread, as I hate filling up the photo thread with waffling text!