KEF C series, C3, C 1 Service Manual

C series

Service manual

REVISION 1.0 Jul-2008

2-WAY BOOKSHELF 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 C1 BK Package 8

Exploded View of C1 BK Package 9

System Frequency Response Curve 10

System Impedance Curve 11

2

Service part list

P/N Description
145B-4000+0 M.BOX C1 PR PACK
1490-7043+0 P.FOAM FOR F1
1490-7123+0 P.FOAM FOR F1 (T SHAPE)
4124-0701+0 TERMIMAL PANEL C1 JY252-7
4153-7191+0 FOOT 3M SJ-5012 BLACK KJC048-00
4154-2612+0 BLACK RUBBER FOOT FOR KHT5005
4160-1100+0 GRILLE SOCKET BK C1
SVC-GRILLE+C1 C1 GRILLE BK SPARE
SVC-TW+C1 SPART PART C1 TW
SVC-WF+C1 SPARE PART C1 WF
SVC-XOV+C1 C1 XOVER SPARE

3

System Specifications

Frequency Range 63 Hz~ 40K Hz
SPL Sensitivity 87dB @1W/m
Nominal Rating 10~100W
Dimension (H x W x D) 260x150x221 mm
Net Weight 3.2kg / pcs
Finish Black or EWL

Woofer Specifications

Rated Impedance 6+/-1.2 ohms at 1V 400 Hz
Sweep Test Sine Wave 5.5V at 20~20K Hz
Resonant Frequency (Fo) 70 +/- 14Hz at 1V
Sensitivity 86+/-2 dB/W/m
Frequency Response Fo - 3K Hz
Rated Power Input 30W
Power Test 30W 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 oC 25~50% R.H. 24 hours
Humidity Test 40 oC 90~95%R.H. 24 hours
Main Magnet Ø70 x Ø32x 10mm Ferrite
Bucking magnet Ø70x Ø32 x 10mm Ferrite
Voice Coil Bobbin Material Al
Cone Material Paper with PP coated
Surround Material Rubber