KEF C Series C7 Manuel utilisateur

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2

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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