A4S
Key Features:
  • 4" (100mm), 8 ohm
  • Voice Range, 3 watts
  • Alnico magnet, felted paper cone;

Primary Specifications

Speakers Environment Indoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 4.0 / 100.0 inch / mm
Rated Impedance 8 ohms
Rated Power 3.0 Watts
Program Power 6 Watts
Frequency Range 140 - 9000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
83 dB SPL
Voice Coil Diameter 0.7 / 17.8 inch / mm
Magnet Weight 0.5 / 15 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 150 Hz
D.C. Resistance (Re) 6.3 ohms
Mechanical Q (Qms)
Electrical Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas) ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) 1.3 mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size 0.19 x 0.02
Magnet Alnico
Voice Coil Wire Copper
Voice Coil Form Aluminum
Cone Felted Paper
Cone Edge Felted Paper
Dust Cap Felt
ID Description Measurements Tolerance
OD Outside Diameter 4.0 in. +/- 0.040”
CD Cutout Diameter 3.3 in. +/- 0.030”
MG Magnet Diameter 0.9 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 4.7 in. +/- 0.020”
ID Internal Depth 1.3 in. Maximum
FT Flange Thickness 0.13 in. +/- 0.050”
NW Net Weight 96.0 g
neodymium