LS445/U
Key Features:
  • 4" (101.6 mm) square, 8 ohm
  • Voice Range, 8 watt
  • Ferrite magnet, Phenolic impregnated Cone and Dust cap
  • NSN 5965-008-923665
  • Built & Tested IAW MIL-DTL-12606
  • used in Communication panels
  • ships with rubber gasket and steel front screen

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 4.0 / 101.6 inch / mm
Rated Impedance 8 ohms
Rated Power 8.0 Watts
Program Power Watts
Frequency Range 300 to 7000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
91 dB SPL
Voice Coil Diameter 0.73 / 18.5 inch / mm
Magnet Weight 5.5 / 156 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 590 Hz
D.C. Resistance (Re) 7.0 ohms
Mechanical Q (Qms)
Electrical Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas) ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Cast Aluminum
Terminal Size 0.152 by 0.025
Magnet Barium Ferrite
Voice Coil Wire Copper
Voice Coil Form Meta-aramid laminate
Cone Cloth impregnated with phenolic resin
Cone Edge Cloth impregnated with phenolic resin
Dust Cap Cloth impregnated with phenolic resin
ID Description Measurements Tolerance
OD Outside Diameter 4.0 in. +/- 0.040”
CD Cutout Diameter 3.41 in. +/- 0.030”
MG Magnet Diameter 2.8 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 4.69 in. +/- 0.020”
ID Internal Depth 1.3 in. Maximum
FT Flange Thickness 0.22 in. +/- 0.050”
NW Net Weight 556.0 g