BLH for the FE 206ES-R- Project Underway

graykeene · 19th June 2007, 06:16 PM

I have undertaken the construction of the recommended FLH for the Fostex FE 206 ES-R. This morning I finished the first speaker enclosure.

Attached is a picture I took before enclosing the side.

I hope to post the first speaker completed very soon.

Godzilla · 19th June 2007, 06:34 PM

that looks like it came out really great!

Scottmoose · 19th June 2007, 08:42 PM

Indeed. Looking good so far!

DocLorren · 19th June 2007, 08:58 PM

Very interesting, please keep us posted how you progress.
Especially after breaking in the ESR I'm very interested in the performance of this enclosure (isn't it a BLH instead of FLH, btw?). See also the current thread about the double horn with the same driver.
http://www.diyaudio.com/forums/showt...43#post1237043

gychang · 19th June 2007, 09:08 PM

Quote:

Originally posted by graykeene
I have undertaken the construction of the recommended FLH for the Fostex FE 206 ES-R. This morning I finished the first speaker enclosure.

Attached is a picture I took before enclosing the side.

I hope to post the first speaker completed very soon.

beautiful place, wouldn't mind camping out (except to hear the speakers of course).

gychang

no xo · 19th June 2007, 09:15 PM

Gray, they look great, and so does the view. I built a pair a few months back, and my initial impressions were not good, but after months of break in and some judicious stuffing, I now love these speakers. I played music thru the drivers for about 100 hrs while building the horns and I`m not sure that helped. They seemed to break in better in the horn, maybe they need to break in as a system, but it took a long time maybe 500 hrs, before they sounded right. Keep us posted regarding your initial impression of the sound. There were a couple old posts, I can`t remember the name of the thread, where I complained about a sort of droning resonance, that bothered me. Time took care of that. I hope the rest of your build goes well and you like them as much as I do. I am very interested how yours sound, and if they require as much break in as mine did.

graykeene · 20th June 2007, 08:34 PM

Thanks to all for the positive feedback.

no xo- question, can you expound on "judicious stuffing"? I will be installing the driver tonight after work and would like your input.

Also, what material did you use? I am using 3/4 inch birch plywood. With the double thick sides and all the guts these things are monsters. I venture somewhere are around 140-145 lbs. before installing the 14 lb. driver.

chrisb · 20th June 2007, 08:57 PM

Quote:

Originally posted by graykeene
Thanks to all for the positive feedback.

no xo- question, can you expound on "judicious stuffing"? I will be installing the driver tonight after work and would like your input.

Also, what material did you use? I am using 3/4 inch birch plywood. With the double thick sides and all the guts these things are monsters. I venture somewhere are around 140-145 lbs. before installing the 14 lb. driver.

For most of the horn and MLTL systems I've heard or played with recently, "judicious" application of stuffing has meant in-room "tuning by ear". At the very least I'd suggest a thin layer of absorbtive (1/2" cotton felt or upholstery padding) or diffractive material (Deflex subwoofer pads) on any design (BLH or not) with a vertical rear panel as near the driver as in this case.

I'd also suggest you consider threaded insert fittings (but not T-nuts) and machine bolts rather than wood screws for installation of the drivers, as they're quite likely gonna come out of the box several times will playing with the CC - eventually the plywood core will get stripped of its screw holding capacity.

The birch plywood was probably a wise choice, sonically as well as for prevention of hernias and sagging floor joists. Tell me you had some help getting that box off the table after taking the picture?

no xo · 21st June 2007, 02:49 PM

Hey Gray, what Chrisb described as room tuning is what I called "judicious stuffing."I have a sheet of Deflex directly behind the driver with about 1" space around side and bottom of CC. This space helps hold the wool batting I placed on ther side and bottom, which is stuffed fairly dense. I also very lightly stuffed the 1st part of the horn, what I would call the throat. And what Chrisb said about threaded inserts ( I used hurricane nuts from Parts Express) is also highly recommended. I have had the driver in and out many times. Don`t tighten them to much initially. Also I see that you use cups for the binding posts. I did that at first, but ended up soldering wires to the terminals on the driver, and a Z plug for the amp. I use Signal Cable for speaker wire and interconnects. Not expensive and hardwired, sounds better than Nordost Blue Heaven with binding posts. Be prepared for a long break in period, and to expiriment. I had them over stuffed initially, sand bags in the bottom of the CC ( not recommended) and somewhat dense stuffing in the 1st 2 folds, and as they broke in, stuffing was reduced a little at a time. Use Deflex for sure. Looking back, I would play music thru for a few months and adjust to taste. These are wonderful horns.

no xo · 21st June 2007, 02:51 PM

One last thing, Gray I used 18mm Baltic Birch, and built them exactly to plan. Keep us posted, NOXO

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19th June 2007, 06:34 PM	#2
Godzilla diyAudio Member Join Date: Nov 2005 Location: New York	that looks like it came out really great!

19th June 2007, 08:42 PM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Indeed. Looking good so far!

19th June 2007, 08:58 PM	#4
DocLorren diyAudio Member Join Date: Nov 2004 Location: Utrecht	Very interesting, please keep us posted how you progress. Especially after breaking in the ESR I'm very interested in the performance of this enclosure (isn't it a BLH instead of FLH, btw?). See also the current thread about the double horn with the same driver. http://www.diyaudio.com/forums/showt...43#post1237043

19th June 2007, 09:15 PM	#6
no xo diyAudio Member Join Date: Jan 2006 Location: Genoa IL far west Chicago suburbs	Gray, they look great, and so does the view. I built a pair a few months back, and my initial impressions were not good, but after months of break in and some judicious stuffing, I now love these speakers. I played music thru the drivers for about 100 hrs while building the horns and I`m not sure that helped. They seemed to break in better in the horn, maybe they need to break in as a system, but it took a long time maybe 500 hrs, before they sounded right. Keep us posted regarding your initial impression of the sound. There were a couple old posts, I can`t remember the name of the thread, where I complained about a sort of droning resonance, that bothered me. Time took care of that. I hope the rest of your build goes well and you like them as much as I do. I am very interested how yours sound, and if they require as much break in as mine did.

20th June 2007, 08:34 PM	#7
graykeene diyAudio Member Join Date: Dec 2006	Thanks to all for the positive feedback. no xo- question, can you expound on "judicious stuffing"? I will be installing the driver tonight after work and would like your input. Also, what material did you use? I am using 3/4 inch birch plywood. With the double thick sides and all the guts these things are monsters. I venture somewhere are around 140-145 lbs. before installing the 14 lb. driver.

21st June 2007, 02:49 PM	#9
no xo diyAudio Member Join Date: Jan 2006 Location: Genoa IL far west Chicago suburbs	Hey Gray, what Chrisb described as room tuning is what I called "judicious stuffing."I have a sheet of Deflex directly behind the driver with about 1" space around side and bottom of CC. This space helps hold the wool batting I placed on ther side and bottom, which is stuffed fairly dense. I also very lightly stuffed the 1st part of the horn, what I would call the throat. And what Chrisb said about threaded inserts ( I used hurricane nuts from Parts Express) is also highly recommended. I have had the driver in and out many times. Don`t tighten them to much initially. Also I see that you use cups for the binding posts. I did that at first, but ended up soldering wires to the terminals on the driver, and a Z plug for the amp. I use Signal Cable for speaker wire and interconnects. Not expensive and hardwired, sounds better than Nordost Blue Heaven with binding posts. Be prepared for a long break in period, and to expiriment. I had them over stuffed initially, sand bags in the bottom of the CC ( not recommended) and somewhat dense stuffing in the 1st 2 folds, and as they broke in, stuffing was reduced a little at a time. Use Deflex for sure. Looking back, I would play music thru for a few months and adjust to taste. These are wonderful horns.

21st June 2007, 02:51 PM	#10
no xo diyAudio Member Join Date: Jan 2006 Location: Genoa IL far west Chicago suburbs	One last thing, Gray I used 18mm Baltic Birch, and built them exactly to plan. Keep us posted, NOXO