105PF04-1
Key Features:
  • 4" (100mm), 4 ohm
  • Woofer, 20 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 4.0 / 100.0 inch / mm
Rated Impedance 4 ohms
Rated Power 20.0 Watts
Program Power 40 Watts
Frequency Range 81 - 12000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
84 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) 81 Hz
D.C. Resistance (Re) 3.4 ohms
Mechanical Q (Qms) 5.35
Electrical Q (Qes) 0.58
Total Q (Qts) 0.53
Compliance Equivalent Volume (Vas) 2.8 ltr
BL Product (BL) 4.4 T-M
Maximum Linear Excursion (Xmax) 1.4 mm
Surface Area of Cone (Sd) 54.0 cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size .110 X .020 / .205 X .020
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Paper
Cone Edge Polyether Foam
Dust Cap Paper
ID Description Measurements Tolerance
OD Outside Diameter 4.2 in. +/- 0.040”
CD Cutout Diameter 3.7 in. +/- 0.030”
MG Magnet Diameter 3.2 in. +/- 0.050”
HD Hole Diameter 0.27 in. +/- 0.020”
MD Mounting Diameter 5.0 in. +/- 0.020”
ID Internal Depth 2.1 in. Maximum
FT Flange Thickness 0.1 in. +/- 0.050”
NW Net Weight 675.0 g
ceramic