The report of the back load phon of a Fostex design
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 Masao Ida
　It is a basic lecture for making a handmade speaker.
　From a beginner, please also looking-obtain maniacs and enjoy
　a handmade speaker.
　It was made the English version so that he could also understand
　overseas one.
　　　　　　　　　　　　　　　　　　　　　　


　The back load phon of a Fostex design
　　　　　　　　　　
　The page translated into English for overseas ones was made.
　That the concern of D-58ES is high overseas although it is having made
　and got to know, and a Fostex design
　The back load phon is made.
　If there is no book with which the plan of Mr. Nagaoka was drawn overseas
　and a unit is purchased, it will follow.
　I think that it is making from this plan.
　The back load phon of Fostex has good looks, and they design it by research
　of Fostex

　Since it is carried out, it is perfect as a back load phon.
　Since it is also collecting as a report of a prejudice as much as possible
　this time, it is from a beginner.
　I think that even a maniac can enjoy himself.

　
　　　　　　　　　　　　　　　　　　　
　　　　　　　　　 The Fostex design made in the direction of Canada
　　　　　　　　　　　　　　　　 　　　　　FE-208EΣBH




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　　　　　　The kind of back load phon of a Fostex design

　　　　　　(1) There is only for what and EΣ series.

　　　　　　　　　　　1. 10 Cm...FE108EΣBH
　　　　　　　　　　　2. 16 Cm...FE168EΣBH
　　　　　　　　　　　3. 20 Cm...FE208EΣBH
　　　　　　　　　　　A unit uses EΣ series.

　　　　　　(2) There is a back load phon for FE168ES.
　　　　　　　　　　　16cm ... FE168ESBH
　　　　　　　　　　　A unit uses FE168ES or FE166 ES-R of new sale.

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　(1) Back Load Phon Only for EΣ Series

　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　　　　　　　FE208EΣ


　It has the same appearance as ES series of limited sale, and ES series
　is inherited.
　Adoption and star type ES corn are very beautiful in newly developed HP
　oscillating board on ES corn.
　junior and senior high schools - low-pass [ of a region / comfortable
　and fine / the tone quality and low-pass ] - a back load phon
　It is the thing of the unit no one but of exclusive use.

　　　　　　　　　　EΣseries　 FE108EΣ　 FE168EΣ　 FE208EΣ


　　1. FE108EΣBH

　
　　　　　　FE108EΣBH They are the front / side / rear surface from the left.
　　　　　　　　P16 is HP sound reflector (sound reflective adjustment board).



　Feature
　1. The design of an air room is the independent thing and tends to tell the
　energy of an oscillating board to The way of sound.
　There is merit also as a point sound source. Reinforcement of the double
　board which prevents Box is carried out.

　2. Looks are beautiful by having made the curve of 11 to 20.
　Although the curve of Mr. Nagaoka is in the front, The way of sound of the
　curve here is curved more.
　Although based also on cage liking, the merit of a back load phon has
　come out.

　2. Use 2.5 Itadori by 910x1820mm of plywood.
　the design which can perform right and left of a speaker in one sheet sake
　　- grain - right and left - it is easy to become the same
　Although it thinks that it understands that it is 1/1 2/2 3/3, grain's
　is satisfactory.



　
　　　　　　　　　　　　　　　The plan of FE108EΣ
　　　　　　　　　　　　　　　The direction of grain <-->

　　　　　　　　　
　　　　　　　　　　　　　　　The plan of FE108EΣ
　　　　　　　　　　　　　　　The direction of grain <-->

　　　　　　　　　
　　　　　　　　　　　　　　　　　　The size figure of a board


　　　　　　　　　　
　　　　　　　　　　　　　　　　　The position of a terminal

　　　　　1. XTwo Which Makes Hole of Phi 20 in Board 10 Using T100
　　　　　2. XTwo Which Makes Hole of Phi 8 in Board 9 (Terminal Board)
　　　　　3. A terminal comes on the rear.



　Since the process of work is shown in a diagram, if it makes this passage,
　it can do.
　A point is considering The way of sound as one block and assembling it.
　It is important to make one block carefully and to assemble at the end.
　　
　The air room has bent 3 times with the independent type, and has reached
　the bottom.
　Height 900mm breadth 200mm Depth of 445mm
　It is a very smart tall boy.
　　　
　 What is used
　Unit FE108EΣ Terminal T100 2.5 15mm plywood
　bond if it can do - attachment of a onime nut others
　- a sound-absorbing material - little Sand and gravel
　　　　　　
　 By E-plywood cut service, they are D-118 and a D-101S super swan at
　 10cm until now. - it was much
　Since it is designed for FE108EΣ, this FE108EΣBH will be made from now on.
　I think a back load phon.



　In addition, in E-plywood cut service, I cut with the following plywood.
　　　　FE108EΣBH
　The China plywood / China runbar wood core material /
　Finland birch. plywood / MDF plywood

　　　　　　　

...........................................................................................................................................
...



　2. FE168EΣBH


　　　　　　FE108EΣBH They are the front / side / rear surface from the left.
　　　　　　　　P16 is HP sound reflector (sound reflective adjustment board).



　 Since a design is the same view as FE108EsigmaBH, exclude a plan.

　The air room has bent 3 times with the independent type, and has reached
　the bottom.
　Height 1100mm breadth 300mm Depth of 445mm
　　　　　

　 What is used
　Unit FE168EΣ Terminal T100 Five 15mm plywood
　bond if it can do - attachment of a onime nut others
　　- a sound-absorbing material - little Sand and gravel
　The addition of Tweeter
　Phon super Tweeter is used.
　Please look at basic lecture (8) about phon super Tweeter.
　
　
　 With E-plywood cut service, there was much D-37 at 16cm until now.
　Since it is designed for FE168EΣ, you may surely examine this FE168EΣBH.
　I think a back load phon.

　In addition, in E-plywood cut service, I cut with the following plywood.
　　　　FE168EΣBH
　The China plywood / China runbar wood core material
　 / Finland birch. plywood / MDF plywood

　　Although it is generally the China plywood / China runbar wood core material,
　 it is high level more.
　The direction to carry out recommends you Finland birch plywood.
　
..............................................................................................................................................
...

　　　　　　　　　



　　3. FE208EΣBH

　
　　　　　FE108EΣBH They are the front / side / rear surface from the left.
　　　　　　P16 is HP sound reflector (sound reflective adjustment board).



　 Since a design is the same view as FE108EsigmaBH, exclude a plan.

　The air room has bent 3 times with the independent type, and has reached
　 the bottom.
　Height 1118mm breadth 372mm Depth of 520mm

　What is used
　Unit FE208EΣ Terminal T100 Six 18mm plywood
　bond if it can do - attachment of a onime nut others
　- a sound-absorbing material - little Sand and gravel
　The addition of Tweeter
　Phon super Tweeter is used.
　Please look at basic lecture (8) about phon super Tweeter.
　

　 With E-plywood cut service, there was much D-55 at 20cm until now.
　Since it is designed for FE208EΣ, this FE208EΣBH is 20cm.
　As a back load phon, it is the optimal. Looks are also good and it is the
　 field of a design.
　But it is a beautiful speaker.
　Moreover, it is popular also overseas and is made mostly.

　In addition, in E-plywood cut service, I cut with the following plywood.
　　FE208EΣBH
　The China plywood / China runbar wood core material
　/ MDF plywood /China apiton plywood

　Although it is generally the China plywood / China runbar wood core material
　 it is high level more.
　The direction to carry out has highest-class China apiton plywood .
　Fostex is the same as the plywood currently used for events.
　
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.................................................................................................................................................................

　　　　Introduction of Jean Houle Mr. FE-208ES DIY Project of Canada

　　　　　　Very beautiful FE208EΣBH is made.
　　　　If you look at home page, since how to make will be introduced
　　　　 with the photograph
　　　　It becomes helpful. The link to a homepage is connected by mail.

　　　　　A plan is FE208EΣ although it is with FE-208ES DIY Project.
　　　　　　　The plan of FE208EΣBH is not attached to FE-208ES.


　　　　　　　　　　　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　
　　　　　　　　　　It links to Jean Houle Mr. FE-208ES DIY Project.



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　　4.FE88ES-R BH
　　
　
　　　　　　　　　　　　　They are the front/side from the left.

　　　　　　　　　


　　Feature
　In the slim type back load phon, it is designed only for [ of FE88 ES-R ] 8.5cm.
　A design is the same view as FE108EsigmaBH, and an air room has the length
　of an independent type and a phon no less than 2m.
　If a pebble and a gravel are put into a small bag and made heavy at a bottom
　it will lead to the increase in low-pitched sound.
　Since, as for FE88 ES-R, the highest quantity region is extended to 40kHz
　super Tweeter is unnecessary.
　　　　
　If the adapter made from exclusive true of P88 ES-R is attached, although
　sound will become clear and low-pitched sound will also increase
　The attachment hole of a speaker opening size is set to 102mm. When not
　attaching, in a plan, they are both because of 90mm.
　It is indicated that it can choose. Board 1/90mm 2/102mm of boards

　Since it was small and there was no good CW phon of looks in FE88 ES-R
　it is this back load phon.
　recommendation is carried out.
　Moreover, the stand is also indicated by the plan. A board 29 - a board 32
　It is not necessary to use a stand without necessity.

　　　　


　　　　　　　　　　　　　　　　　The plan of FE88 ES-R BH
　　　　　　　　　　　　　　　　　The direction of grain <-->

　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　The size figure of a board

　　　　　　　　　
　　　　　　　　　　　　A stand base and the The attachment hole of a speaker

　 The air room has bent 3 times with the independent type, and has reached the
　 bottom. 2m of phon length

　　　　　Height 795mm breadth 150mm Depth of 358mm

　 What is used
　Unit FE88 ES-Rx2 Terminal T150B or P24B Two 15mm plywood
　bond if it can do - attachment of a demon nut others - a sound-absorbing
　material - little Sand and gravel
　What improves the piece of sound P88 ES-Rx2

　Attachment of a terminal
　It is a 50mm center from the upper part of the board of 5.
　Or it attaches in a 50mm center from the rear of the board of 3.

　 Although D-118.2 made from E-plywood cut service by 8.5cm until now
　Since this FE88 ES-R BH is designed by Fostex only for FE88 ES-R
　I think the back load phon made from now on.

　In addition, in E-plywood cut service, I cut with the following plywood.
　　　　　　FE88ES-R BH
　The China plywood / China runbar wood core material
　 /Finland birch plywood / MDF plywood

　





　　(2) Back Load Phon for FE168ES

　　　16cm ... FE168ESBH
　　　A unit uses FE168ES or FE166 ES-R of new sale.


　　　　　　　　　　　　　　　The front/side of FE168ESBH








　　　　　　　　　　　　　　　　　The plan of FE168ESBH
　　　　　　　　　　　　　　　　　The direction of grain <-->


　　Feature
　Although it is orthodox as a back load phon, curved The way of sound
　 is brilliant also here.
　It is a thing and looks are satisfactory.
　A setup and speediness are highly to 30Hz about the cutoff frequency
　 of a phon at phon length 2.5mw.
　It is sharp and a sound with a cut is reproduced.
　　　　
　The air room has bent 3 times with the independent type, and has reached
　the bottom.
　Height 1000mm breadth 312mm Depth of 555mm
　　　

　 Although height is the same, its this one is [ D-37 ] larger by breadth
　12mm depth of 105mm.
　Since the unit has set up FE168ES, it serves as this size.

　FE166 ES-R of new sale can also be used.
　FE168ESBH is turned to for the unit to which the magnet became powerful
　rather than FE166EΣ.

　FE166 ES-R is good E168ESBH of looks, although D-37 or E168ESBH can
　be used. We recommend you.

　 Attachment of a terminal
　T100 is attached in the position of 50mm from the rear of a board 9.

　 What is used
　Unit FE166 ES-R Terminal T100 Six 18mm plywood
　bond if it can do - attachment of a onime nut others
　- a sound-absorbing material - little Sand and gravel
　The addition ofTweeter
　Phon super is used.
　Please look at basic lecture (8) about phon super Tweeter.

　　
　 In addition by E-plywood cut service, I cut with the following plywood.
　　　　　　FE168ESBH
　　The China plywood / China runbar wood core material
　 / MDF plywood / China apiton plywood

　Although it is generally the China plywood / China runbar wood core material
　 it is high level more.
　The direction to carry out has highest-class China apiton plywood.
　Fostex is the same as the plywood currently used for events.
　　　　

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　 The cut of plywood is dealt with. It passes
　　and is a link.
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

　The order of a unit etc. is dealt with.
　 It passes and is a link.