JC57CD
Key Features:
  • 5 X 7" (127 X 177mm), 8 ohm
  • Full Range, 15 watts
  • Ferrite magnet, paper cone with pre-treated black cloth surround;

Primary Specifications

Speakers Environment Indoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 5.0 x 7.0 / 127.0 x 177.0 inch / mm
Rated Impedance 8 ohms
Rated Power 15.0 Watts
Program Power 30 Watts
Frequency Range 75 - 12000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
95 dB SPL
Voice Coil Diameter 1.0 / 25.4 inch / mm
Magnet Weight 10.0 / 284 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 100 Hz
D.C. Resistance (Re) 6.8 ohms
Mechanical Q (Qms)
Electrical Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas) ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) 1.1 mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size 0.19 x 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Aluminum
Cone Paper
Cone Edge Pre-treated Black Cloth
Dust Cap Paper Whizzer
ID Description Measurements Tolerance
OD Outside Diameter 7.3 in. +/- 0.040”
CD Cutout Diameter 6.7 in. +/- 0.030”
MG Magnet Diameter 3.4 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 4.3 in. +/- 0.020”
ID Internal Depth 2.1 in. Maximum
FT Flange Thickness 0.14 in. +/- 0.050”
NW Net Weight 841.0 g
ceramic