74OA04-1WP
Key Features:
  • 1.5 X 2.8" (41 X 71mm), 4 ohm
  • Voice Range, 2 watts
  • Alnico magnet, water resistant paper cone with cloth surround;

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 1.5 x 2.8 / 41.0 x 71.0 inch / mm
Rated Impedance 4 ohms
Rated Power 2.0 Watts
Program Power 4 Watts
Frequency Range 270 - 18000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
83 dB SPL
Voice Coil Diameter 0.6 / 15.2 inch / mm
Magnet Weight 0.4 / 12 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 300 Hz
D.C. Resistance (Re) 7.8 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 Stamped Steel
Terminal Size 0.110 x .02
Magnet Alnico
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Water Resistant Paper
Cone Edge Pre-treated Black Cloth
Dust Cap Paper
ID Description Measurements Tolerance
OD Outside Diameter 2.8 in. +/- 0.040”
CD Cutout Diameter 2.6 in. +/- 0.030”
MG Magnet Diameter 0.9 in. +/- 0.050”
HD Hole Diameter 0.14 in. +/- 0.020”
MD Mounting Diameter 1.3 in. +/- 0.020”
ID Internal Depth 1.1 in. Maximum
FT Flange Thickness 0.1 in. +/- 0.050”
NW Net Weight 51.0 g
neodymium