KC4MB-8C
Key Features:
  • 4" (102 mm), 8 ohm
  • Mid Range, 25 watt
  • Ferrite magnet, Carbon Fiber cone with natural rubber surround
  • Cast Aluminum Basket
  • Copper Shorting Ring;

Primary Specifications

Speakers Environment Indoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 4.0 / 102.0 inch / mm
Rated Impedance 8 ohms
Rated Power 25.0 Watts
Program Power 50 Watts
Frequency Range 60 - 15000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
89 dB SPL
Voice Coil Diameter 1.0 / 25.4 inch / mm
Magnet Weight 12.0 / 341 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 67 Hz
D.C. Resistance (Re) 6.4 ohms
Mechanical Q (Qms) 3.5
Electrical Q (Qes) 0.37
Total Q (Qts) 0.33
Compliance Equivalent Volume (Vas) 6.4 ltr
BL Product (BL) 5.3 T-M
Maximum Linear Excursion (Xmax) 1.5 mm
Surface Area of Cone (Sd) 55.0 cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Cast Aluminum
Terminal Size 0.110 X 0.02 / 0.19 X 0.02
Magnet Ferrite
Voice Coil Wire Edge Wound Copper
Voice Coil Form Kapton
Cone Grey Carbon
Cone Edge Natural Rubber
Dust Cap Rubber
http://s3.amazonaws.com/misco/curves/KC4MB-8C.JPG?1345610465
ID Description Measurements Tolerance
OD Outside Diameter 4.4 in. +/- 0.040”
CD Cutout Diameter 3.9 in. +/- 0.030”
MG Magnet Diameter 3.4 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 4.5 in. +/- 0.020”
ID Internal Depth 2.3 in. Maximum
FT Flange Thickness 0.25 in. +/- 0.050”
NW Net Weight 954.0 g
ceramic