77SF04-4SH
Key Features:
  • 3" (77mm), 4 ohm
  • Full Range, 8 watts
  • Ferrite magnet, paper cone with polyether foam surround
  • RoHS compliant;

Primary Specifications

Speakers Environment Indoor
ROHS Compliant Yes

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 3.0 / 77.0 inch / mm
Rated Impedance 4 ohms
Rated Power 8.0 Watts
Program Power 16 Watts
Frequency Range 100 - 20000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
89 dB SPL
Voice Coil Diameter 0.8 / 20.3 inch / mm
Magnet Weight 2.6 / 75 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 125 Hz
D.C. Resistance (Re) 3.7 ohms
Mechanical Q (Qms) 3.3
Electrical Q (Qes) 0.89
Total Q (Qts) 0.7
Compliance Equivalent Volume (Vas) 1.8 ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) 0.8 mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size 0.110 X 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Paper
Cone Edge Polyether Foam
Dust Cap Mylar
http://s3.amazonaws.com/misco/curves/77SF04-4SH.JPG
ID Description Measurements Tolerance
OD Outside Diameter 3.2 in. +/- 0.040”
CD Cutout Diameter 2.8 in. +/- 0.030”
MG Magnet Diameter 2.7 in. +/- 0.050”
HD Hole Diameter 0.27 in. +/- 0.020”
MD Mounting Diameter 3.4 in. +/- 0.020”
ID Internal Depth 1.7 in. Maximum
FT Flange Thickness 0.2 in. +/- 0.050”
NW Net Weight 380.0 g
ceramic