KEF C Series C7 Manual de usuario
C series
Service manual
REVISION 1.0 Jul-2008
2-WAY FLOORSTAND SPEAKER
1
Table of Content
Service part list 2
System Specifications 3
Woofer Specifications 3
Tweeter Specifications 4
Schematic Diagram/ Exploded View of Crossover 5
Exploded View of Cabinet 6
Exploded View of BK Package 8
Exploded View of EWL Package 9
System Frequency Response Curve 10
System Impedance Curve 11
2
Service part list
P/N Description
1403-1840+0 K190100A ADJUSTABLE FOOT
1419-1310+0 PLINTH C7 BK
145B-4040+0 M.BOX C7 SGL
1491-7391+0 POLY.FOAM C7 WHITE 450X320X120
1491-7392+0 POLYFAOM B C7
2904-6020+3000 SCREW M6*20 12MM BK
4124-0711+0 TERMINAL PANEL C3 JY251-1
4159-1400+0 SHORTING LINK RIGHT C3
4159-1410+0 SHORTING LINK LEFT C3
4160-1100+0 GRILLE SOCKET BK C1
SVC-GRILLE+C7 C7 GRILLE BK SPARE
SVC-TW+C1 SPART PART C1 TW
SVC-WF+C7 SPARE PART C7 WF
SVC-XOV+C7 C7 XOVER SPARE
3
System Specifications
Frequency Range 36 Hz~ 40K Hz
SPL Sensitivity 90dB @1W/m
Nominal Rating 15~125W
Dimension (H x W x D) 965x203x286 mm
Net Weight 13.4kg / pcs
Finish Black or EWL
Woofer Specifications
Rated Impedance 6+/-1.2 ohms at 1V 400 Hz
Sweep Test Sine Wave 6V at 20~20K Hz
Resonant Frequency (Fo) 43 +/- 8Hz at 1V
Sensitivity 88+/-2 dB/W/m
Frequency Response Fo - 3K Hz
Rated Power Input 50W
Power Test 50W RMS/Channel
(The rated power is verified by performing power handling
test by feeding rated output with IEC268-5 for 8 hours)
Heat Test 60
o
C 25~50% R.H. 24 hours
Humidity Test 40
o
C 90~95%R.H. 24 hours
Main Magnet Ø80 x Ø40x 15mm Ferrite
Bucking magnet Ø70x Ø32 x 8mm Ferrite
Voice Coil Bobbin Material Al
Cone Material Paper with PP coated
Surround Material Rubber
4
Tweeter Specifications
Rated Impedance 3 +/- 0.6 ohms at 1V 3K Hz
Sweep Test Sine Wave 1V at 1K~20K Hz
Sensitivity 86dB/W/m
Frequency Response Fo--18K Hz
Rated Power Input 50W
Power Test 50W RMS/Channel with Q1 Xover
(The rated power is verified by performing power handling
test by feeding rated output with IEC268-5 for 4 hours)
Heat Test 60
o
C /% R.H. 24 hours
Humidity Test 40
o
C 90~95% R.H. 24 hours
Voice Coil Bobbin Material Kapton
DomeMaterial Aluminum
5
Schematic Diagram of Crossover/ Exploded View of Crossover
7012-1440+0 #18AWG TWIN RED&RED/BLACK 550MM #205/205
6360-1371+0 C
A
B
L
E
T
I
E
1
5
0
M
M
*
2
.
7
M
M
474D-R82J+1-B 0.82ohm +/-5% 11W
157F-186J+1-X$ 18UF+/-5% 50V DF<5% 1KHZ BENNIC B05A
1725-331A+0001 P
C
B
F
O
R
I
Q
3
S
S
5
9
X
7
9
M
M
T
=
1
.
6
M
M
P
H
E
N
O
L
I
C
P
A
P
E
R
1806-2792+0 IRON CORE 1.0MH+/-5% 0.7OHM+/-5%@100HZ
3004-0099+0 MODEL LABEL FOR C7 XOVER
7012-0120+0 #18AWG TWIN BLUE&BLUE/BLACK 0.3M 205/110
7012-0130+0 #18AWG TWIN RED&RED/BLACK 0.3M 205/110
#18AWG TWIN BLUE&BLUE/BLACK 550MM #205/205
25UF+/-5% 100V DF<6% 1KH Z K143082A BENNIC
1.8ohm +/-5% 5W K591R80J224
10UF+/-5% DFMAX3% 50V AL D12*26
AIR CORE 0.11MH+/-2.5% 0.2ohm 13-10/89T/10KHZ
C
A
B
L
E
T
I
E
1
5
0
M
M
*
2
.
7
M
M
157F-106J+1-W@
1804-1790+0
7012-1450+0
157H-256J+1-X$
6360-1371+0
474B-1R8J+1-B
6
Exploded View of Cabinet
7
8
Exploded View of BK Package
9
Exploded View of EWL Package
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