4EAM
Key Features:
  • 4", Square Basket, 3/4" VC Diameter
  • 3 oz Ceramic Magnet, 4 Ohm Impedance
  • Voice Communications in Mass Transit
  • Features Moisture Repellant Treatment
  • NSN 5965-00917-0455

Primary Specifications

Speakers Environment Indoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 4.094 / 104.0 inch / mm
Rated Impedance 4 ohms
Rated Power 20.0 Watts
Program Power Watts
Frequency Range 300 to 6000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
91 dB SPL
Voice Coil Diameter 3.0 / 19.3 inch / mm
Magnet Weight 3.0 / 85 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 400 Hz
D.C. Resistance (Re) 3.6 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 Steel
Terminal Size 0.187 x 0.022
Magnet Barium Ferrite
Voice Coil Wire Copper
Voice Coil Form Aluminum
Cone Molded Paper Fiber
Cone Edge Molded Paper Fiber
Dust Cap Paper
http://s3.amazonaws.com/misco/curves/4EAM.JPG?1490803368
ID Description Measurements Tolerance
OD Outside Diameter 4.12 in. +/- 0.040”
CD Cutout Diameter 3.809 in. +/- 0.030”
MG Magnet Diameter 2.38 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 4.687 in. +/- 0.020”
ID Internal Depth 1.38 in. Maximum
FT Flange Thickness 0.037 in. +/- 0.050”
NW Net Weight 303.0 g