Handmade speaker basic lecture �A
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　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.
　　　　　　　　　　　　　　　　

　
(2) A speaker unit and enclosure

(1) Speaker Unit

　 There are many kinds of units. They are a diameter of a large quantity
　 and　20〜10cm about 25cm or more.
　When the diameter of Nakaguchi and 8cm or less are made into the diameter
　 of a small sum, the diameter of a large quantity is profitableness [ low-pitched
　 sound　　 reproduction ] and a diameter of Nakaguchi.
　reproduction and the diameter of a small sum are advantageous to loud-sound
　reproduction.

　 The oscillating version of a unit needs large area for reproduction of
　low-pitched sound with regards to a sound wave.
　Vibration is carrying out low-pitched sound slowly, and it is reproduced in
　 large area. Vibration loud sound
　For high speed, the oscillating version is light and area also becomes small.
　
　The feature of low-pitched sound

　 Turn to a side [ of a unit ], and reverse-side side, and consider as the method
　 of escape.

　A back load phon aims at this character, and is [ quantity and ] inside from a unit
　to the front part.
　It is the speaker which reproduced sound, was going to make Sound Way
　from the　bottom and was going to reproduce low-pitched sound.
　It is the masterpiece of -.


　 Please look at the next Sound Way of D-58ES.

Many of back load phons of Mr. Nagaoka connect , and it is gradually.
　　　It is made thick, and it folds up to many steps and is made a box type.

　　　　　　　　　



　　　* A unit uses a full range. A unit uses FE208ES.

　　　　　　It is carrying out.
　　　　　　　　　　　　　　　　　　
　(1) Full-range unit

　　　　　　　　　　　　　　
　　　　　　　　　　　　 　　　FostexFE103E

　If a beginner enters from a full range, he will think that he is good. Not only
　 a beginner
　A full range reproducible from low-pitched sound to loud sound is the extreme
　for advanced maniacs.
　It is a unit. A model can also be used for many various uses.

　 A screen is in disorder at a full range only for back load phon. nor to neither
　an omnipotent type and the object for TV.
　There is also a A magnetic circuit type.

　　　　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　　　　 　FostexFE108EΣ

　The 10cm full-range unit of Fostex
　FE107E FE108 E�認E 103E PS100 FE108ES FE108ESII
　107E is a magnetic circuit type. E�忍S ES II is only for back loads.

　Others There is a full-range unit of 8cm 12cm 16cm 20cm.



　(2) The kind of unit
　　　　　　　　　　　　　　　　
　　　　　　　　　　　 　　　 　　　Woofer / super　Tweeter of Fostex

　Woofer Low-pitched sound is mainly reproduced and it is 8 to 80cm.It is.

　Squawker Inside sound is mainly reproduced and it is 8cm - 20cm.

　Tweeter Loud sound is reproduced by 8cm or less.
　





　(2) Various Kinds of Enclosures

　(1) Plane

　The simpleest thing of only attaching a unit in one board

　　　　　　　　　　　　　　　　　
　(2) Sealed type

　 Attach a unit to the sealed box.
　Speaker attachment hole Board before attaching a unit
　Air spring Although it is the thing of the air in a box, it is the oscillating board
　of a unit.
　It is related to Area.

　the optimal spring (the optimal amount of contents) was decided -- dividing
　-- not coming out -- still
　It is not too large, and is not too small, the size of a box is decided with an
　 exactly good value, and it is .

　Probably, specifically, you may judge by experience.

　　　　　　　　　　　　　　　　　

　　　　　　　　　　　　　
　
　(3) A bus reflex, a double bass reflex

　 Omit the Bath FREX (low-pitched sound reflection) type, and they are a bus
　reflex port and a duct.
　Although what made the hole in the sealing box is called port, since the effect
　is weak, it is a pipe.A (duct) is attached.

　An effect attenuates inside loud sound, is made to only low-pitched
　sound purposely, and doubles low-pitched sound.
　It is going to carry out. A double bass reflex has two bus reflexs.
　The double bass reflex of Low sound is more advantageous.

　　　　　Bus reflex
　　　　　　　　　　　　　　　　　　　

　　　　　Double bass reflex
　　　　　　　　　　　　　　　　　　　

　(4) Back load phon

　Phon Pipe which spreads gradually in the same language a horn
　For a back load, it is front to have attached the phon before the unit.
　It is a Back load phon to have attached the phon to and the back.

　The full length of a phon amounts to 2-4M. What was intricately used as the
　fold-up box type
　It is the masterpiece back load phon of a Handmade speaker.

A super swan, and D-58ES and I are the masterpiece of Mr. Nagaoka,
　　　　 although made.
　　　　　a design -- various -- many lovers are making

　　　　　　　　　　　　　　　　　　　

　
　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　Popular D-55

　(5) Resonance pipe

　 The system using pipe resonance

　Bow bow is [ this ] a principle when the month of a bottle is blown.
　If it is this length from length grade of 900mm in order to be used as a resonance
　 pipe
　The sound which it resonates and is called bow bow is strengthened.

　If it is 40Hz and 3M when it is 2M, 28Hz low-pitched sound will be strengthened
. If there is length
　Although it is good, 3 chip boxes stop being able to resonate easily even in 2
　chip boxes.

　 A design of Mr. Nagaoka of a resonance pipe
　Canon Rear canon High canon The most famous, although there is big canon etc.
　A thing is Nessie series.

　Since a resonance pipe is suitable as a Surround use, it will be made for
　[ such as 7.1cH, ] AV from now on. is seemed.



me -- the Surround back -- rear canon and rear one -- Nessie Jr was
　　　　made for business
　　　　　A sound source spreads very much and AV is suited.
　　　　
　　　　　　　　　　　　　　
　　　　　　　　　　　　


　　　　　　　　　　　　　　　　　　
　　　　　　　　　　　QS106 The upper part of rear canon II

　
　 Structure is the resonance pipe of J type of 1-time bending. the upper
　 photograph is brown
　The number of the portions of the 1st pipe and its absentminded is
　 [ a portion ] the 2nd.
　It is set to 3m in all. The ideal of bending is even at 2 times, although it is one
　It is hard coming to resonate more than it.

　Since rear canon is two units. A spread of sound is felt more.
　Usually, for Low sound , since it is not outputted, Surround is a resonance
　pipe with　insufficient Low sound .
　rear one of Surround -- it is existence effective as business

　For the attachment position of a unit, it is in 1180mm and this is the height
　of an ear.
　Since it becomes high, it comes exactly as an object for Surround.

It is advantageous for Surround that a unit position is high, and it is
　　　 rear canon.
　　　since it begins -- rear one of the "way ship" of Mr. Nagaoka -- it was
　　　designed as a speaker of business
　　　It is a thing.



　　　* Look at and pass here and it is a link.