Fostex FF85K DATA SHEET

Features

• ø70mm large ferrite magnet

• Special paper cone made of

‘non-wood pulp fiber [KENAF]

and bio-cellulose fiber

• UDR tangential edge

•Aluminum center radiator con-

nected onto voice coil

Specifications

&

Thiele/Small Parameters

80 3

Size :

Voice Coil Diameter

:

Cast / Stamped :

Impedance :

Reproduction Frequency Response

: f0 -

Sound Pressure Level

:

Rated Input :

Music Power :

Magnet Material :

Magnet Weight

(main) :

(cancel) :

Net Weight

228.3 0.503

n/a n/a

565.0 1.246

mm / in

20 1

mm / in

Stamped

8

Ω

125

kHz

88

dB/W(m)

5

W

10

W

Ferrite

g / lb

g / lb

g / lb

FULL RANGE SPEAKER UNIT

FF85K

Frequency Response / Impedance

110

100

90
80
70

60
50

(dB)

20 50 100 200 500

Hz

Impedance

1k

2k 5k

10k

30º

60º

20k 40k

0º

Ω

16

8

4

a :

D :

Sd :

Zn :

Fs :

Re :

Le :

Qms :

Qes :

Qts :

Mms :

BL :

Vas :

Xmax :

Eff/η0 :

Cms :

EBP :

0.00283

122

7.08

n/a

5.54

0.52

0.47

1.8

4.33

1.07

0.55

0.37

0.001

235

mm

3

mm

6

2

m

8

Ω

Hz

Ω

mH

g

Telsa/m

L

mm

%

mm/N

Dimensions & Mounting Information

4-4 x 6 hole

ø86

8
15

FF85K

FULL RANGE

IMP,8Ω Mus.15W

NOM.5W

ø77.4

ø72

Overall Diameter :

40

30

Baffle Hole Diameter

Depth :

4

6

ø70

ø77

83

83 3

72 3

:

49 2

(49)

mm / in

mm / in

mm / in