Fostex FF225WK Owner's Manual

Specifications & Thiele/Small Parameters
FF85WK FF105WK FF125WK
Size 80mm/3.2" 100mm/4.0" 120mm/4.8"
83mm/3.3"
Overall diameter 107mm/4.3" 117mm/4.7"
73mm/2.9"
Baffle hole diameter 93mm/3.7" 104mm/4.1"
46.7mm/2.0"
Depth 52.8mm/3.0" 61.3mm/3.0"
16mm/0.7" 20mm/0.8" 25mm/1.0"
Voice coil diameter
Stamped Stamped Stamped
Cast / Stamped
8Ω 8Ω
Impedance
fs ~ 28kHz fs ~ 25kHz fs ~ 22kHz
Reproduction frequency response
86.5dB/W(m) 88dB/W(m) 89dB/W(m)
Sound pressure level
5W 10W 16W
Rated input
15W 30W 50W
Music power
187g/0.412lb 340g/0.750lb 388g/0.855lb
Magnet weight
450g/0.992lb 800g/1.764lb 920g/2.028lb
Net weight
30mm 40mm 46mm
Equivalent diaphragm radius a
60mm 80mm 92mm
Effective cone diameter D
0.0028m 0.005m 0.0066m
Surface area of cone Sd 2 2
8Ω 8Ω
Nominal impedance Zn
115Hz 75Hz 67Hz
Resonance frequency Fs
7.2Ω 6.7Ω 6.7Ω
DC resistance Re
0.032mH 0.041mH 0.044mH
Coil inductance Le
3.298 4.203 5.091
Mechanical Q Qms
0.683 0.463 0.464
Electromagnetic Q Qes
0.55 0.41 0.42
Total Q Qts
2g 3.4g
Equivalent mass Mms
3.93Tesla/m 4.823Tesla/m 5.596Tesla/m
BL product (Factor force) BL
1.036L 4.848L 7.265L
Compliance equivalent volume Vas
0.35mm 1.7mm 1.65mm
Voice coil overhang Xmax
0.246% 0.42% 0.451%
Reference efficiency n0 Eff/n0
Mechanical compliance of
suspension Cms 0.909m/N 1.346m/N 1.153m/N
Efficiency bandwidth product EBP 168.375 161.987 144.397
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER - SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING:
To reduce the risk of fire or electric shock, do not expose
apparatus to rain or moisture.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all Instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with
the manufacturer's instructions.
8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9. Do not defeat the safety purpose of the polarized or grounding -
type plug. A polarized plug has two blades with one wider than the
other. A grounding type plug has two blades and a third grounding
prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particu-
larly at plugs, convenience receptacles, and the point where they
exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
FOSTEX CO.
3-2-35 Musashino, Akishima-shi, Tokyo, Japan 196-0021
• Dimensions & mounting information
FF165WK FF225WK
160mm/6.3" 200mm/7.9"
FF85WK FF105WK
166mm/6.6" 208mm/8.2"
Standard enclosure Bass-Reflex Bass-Reflex
146mm/5.8" 185mm/7.3" Inner volume 3.5 6
W (inside dimension) 108 128
76.6mm/4.0" 91.7mm/4.0"
D (inside dimension) 149 192
35mm/1.4" 50mm/2.0"
H (inside dimension) 223 264
Stamped Stamped
Height to the center 65 65
8Ω 8Ω 8Ω
of unit (H1)
Height to the center 55 60
fs ~ 21kHz fs ~ 17kHz
of duct (H2)
92dB/W(1m) 93dB/W(1m)
Duct length (L) 100 85
30W 34W
Duct diameter (øD) ø40 ø40
90W 100W Tuning frequency (fb) 92Hz 72 Hz
848g/1.869lb 1,067g/2.352lb
W
1,950g/4.299lb 3,520g/7.760lb
65mm 84mm
130mm 168mm
0.0132m 0.022m
2 2 2
8Ω 8Ω 8Ω
50Hz 44Hz
6.5Ω 6Ω
0.056mH 0.068mH
4.19 2.31
0.373 0.409
0.34 0.35 D
5g 9.5g 18.4g
7.227Tesla/m 8.488Tesla/m
27.838L 57.898L
1.85mm 2.25mm
0.908% 0.995%
1.068m/N 0.826m/N
134.048 107.579
The lightning flash with arrowhead symbol, within an equilat-
eral triangle, is intended to alert the user to the presence of
uninsulated "dangerous voltage" within the product's enclo-
sure that may be of sufficient magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
Avertissement:
Pour réduire le risque d'incendie ou de choc électrique, ne pas
exposer cet appareil sous la pluie et l'humidité.
13. Unplug this apparatus during lightning storms or when unused for
long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way, such
as power-supply cord or plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been
dropped.
15. The apparatus shall be used in an open area.
Cet appareil doit être utilisé dans un endroit a aire ouverte.
16. Apparatus shall not be exposed to dripping or splashing and that no
objects filled with liquids, such as vases, shall be placed on appara-
tus.
L'appareil ne doit pas êclaboussures et aucun objet ne contenant
de liquide, tel qu'un vase, ne doit être placé sur lobjet.
17. Mains plug is used as disconnect device. It shall remain readily
operable and should not be obstructed during intended use. To
completely disconnect the apparatus from supply mains, the mains
plug of the apparatus shall be disconnected from the mains socket
outlet completely.
La prise du secteur et utilisé pou déconnecter le système. La prise
du secteur ne doit pas être obstruée ou doit être facilement acces-
sible pendant son utilisation. Pour être complètement déconnecté
de l'alimentation d'entrée, la prise doit être débranchée du secteur.
PRINTED IN CHINA MARCH 2011
FF125WK FF165WK FF225WK
Bass-Reflex Bass-Reflex Bass-Reflex
9 18 28
142 200 230
218 237 280
296 380 435
70 100 110
60 90 100
100 145 190
ø40 ø65 ø65
57 Hz 54 Hz 39 Hz
D
L
Thank you for purchasing our product. FF-WK series are full-range speaker units ideally and exclusively
designed for a bass-reflex enclosure. The previous FF series speaker units construction has thoroughly been rede-
signed on the FF-WK series. With a new addition of 10-cm diameter speaker unit to the product range, new tech-
nologies such as a "double-layer" paper cone, a ridge-dome shape aluminum alloy center cap and a pocket neck
damper have been employed for high-quality sound. Even with these new technologies, FF-WK series inherit the
previous FF series bright and realistic sound character, and achieve a powerful low sound and non-characterized
high frequency sound reproduction. Please read this manual carefully before use.
535483
OWNER'S MANUAL
FULL RANGE SPEAKER UNIT