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I
RED MARKING
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RED MARKING
øJ
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MODEL A B C D E F G H I J Note
FF85WK ø70
47.5 4-4 x 6** ø86 ø65 43.3 3.4 15 ø73
FF105WK ø92
54.6 4-5 x 6** ø115 ø85 48.8 4 15 ø93
FF125WK ø102.2
62.4 4-ø5* ø126 ø90 57.5 3.8 15 ø104
FF165WK ø143.6
78.5 4-ø5* ø174 ø120 72 4.6 20 ø146
FF225WK ø182
93.7 4-ø5* ø220 ø145 86.5 5.2 18 ø185
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Hz
'RXEOHOD\HUFRQHXSUROOHGJHXVLQJDQHZPDWHULDO
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3,(H%(.-+"4127"2710"-*/"7('/0"2$"(*0("*."%..(-(00*,+"0$%.#"-$'$,*21$."*2"71=7"3,(H%(.-+",*.=(5""!'0$"#1,(-2"-$%/'1.="4127"27("A$1-("-$1'"
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02,(.=27"$3"27("-$.(".(-C"0(-21$.",(*'1@(0"*."1B/,$A(#"71=7"3,(H%(.-+",(0/$.0(5"KB/'$+1.="27("/$-C(2"07*/("*2"27("#*B/(,".(-C"0(-21$."
7*0",(*'1@(#"27("J)/$1.2"='%1.="(A(."4127"27("%0*=("$3"L%.-21$."-*&'(5""
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Main Features
D7("-$'$,"2$.("$3"99):;"0(,1(0"-$.("/*/(,"10"-,(*2(#"&+"27("&1.-7$"-7*,-$*'"*.#".$"#+("10"%0(#5"G%("2$"2710"3*-2<"27(,("10"*"-*0("27*2"27("-$'$," 2$.("
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FF-WK New Technology Elements
Surface Layer
(kenaf: about 2 mm of fiber length)
Basic Layer
(wooden pulp: about 4 mm of fiber length)
Surface Layer
0.697
3.608
2273
3.264
0.0258
Density (g/cm
3
)
Young’s modulus (Gpa)
Acoustic velocity (m/s)
Bending rigidity
Internal loss
Basic Layer
0.77
3.598
2158
2.8
0.0298
Pocket Neck Damper
(Shape Diagram)
Comparison on ridge / conventional dome vibration mode
Conventional dome diaphragm
shape and vibration mode
Ridge dome diaphragm
shape and vibration mode
Axis objective mode occurs.
Axis objective mode does not occur.
Comparison on ridge / conventional dome freq. response
Ridge dome
Conventional dome
Outer Shape / Baffle Hole Dimensions List
*: Circular hole, **: Slotted hole
FF85/105/125WK outer shape drawing FF165/225WK outer shape drawing Baffle hole drawing
Frequency Response
PLUS TERMINAL
PLUS TERMINAL
FF85WK FF105WK
FF125WK
FF165WK
FF225WK
IMPEDANCE
IMPEDANCE
IMPEDANCE
IMPEDANCE
IMPEDANCE