JJC54MB-4C
Key Features:
  • 5.5" (139mm), Cast aluminum basket, 4 ohm
  • Woofer / Mid Bass, 25 watts
  • Ferrite magnet, black polypropylene cone with natural rubber surround RoHS compliant

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant Yes

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 5.5 / 139.0 inch / mm
Rated Impedance 4 ohms
Rated Power 25.0 Watts
Program Power 50 Watts
Frequency Range 60 - 11000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
93 dB SPL
Voice Coil Diameter 1.0 / 25.4 inch / mm
Magnet Weight 20.0 / 568 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 70 Hz
D.C. Resistance (Re) 3.4 ohms
Mechanical Q (Qms) 2.02
Electrical Q (Qes) 0.41
Total Q (Qts) 0.34
Compliance Equivalent Volume (Vas) 5.73 ltr
BL Product (BL) 5.9 T-M
Maximum Linear Excursion (Xmax) 5.7 mm
Surface Area of Cone (Sd) 87.0 cm2
Moving Mass (Mmd) 8.42 g

Material Descriptions

 
Basket Cast Aluminum
Terminal Size 0.25 X 0.03/ 0.19 X 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Aluminum
Cone Polypropylene
Cone Edge Natural Rubber
Dust Cap Polypropylene
http://s3.amazonaws.com/misco/curves/JJC54MB-4C.JPG
ID Description Measurements Tolerance
OD Outside Diameter 5.5 in. +/- 0.040”
CD Cutout Diameter 4.8 in. +/- 0.030”
MG Magnet Diameter 3.8 in. +/- 0.050”
HD Hole Diameter 0.16 in. +/- 0.020”
MD Mounting Diameter 5.7 in. +/- 0.020”
ID Internal Depth 2.9 in. Maximum
FT Flange Thickness 0.24 in. +/- 0.050”
NW Net Weight 1354.0 g
ceramic