Markaudio Alpair-5 Grey 3" Full Range Aluminium Woofer

Woofer Type : Full-range
Nominal Diameter : 3"
Power Handling (RMS) : 15 Watts
Impedance (Z) : 4 ohms
Sensitivity : 86.7 dB 2.83V/1m
Frequency Response : 90 to 25,000 Hz
Voice Coil Diameter : 1"
DC Resistance (Re) : 3.6 ohms
Voice Coil Inductance (Le) : 0.39 mH
Resonant Frequency (Fs) : 101.22 Hz
Mechanical Q (Qms) : 1.49
Electromagnetic Q (Qes) : 0.75
Total Q (Qts) : 0.50
Diaphragm Mass Inc. Airload (Mms) : 2.1 g
Surface Area of Cone (Sd) : 28.270 cm²
BL Product (BL) : 2.5 Tm
Compliance Equivalent Volume (Vas) : 0.047 ft.³
Maximum Linear Excursion (Xmax) : 3 mm
Cone / Diaphragm Material : Paper
Surround Material : Rubber
Basket / Frame Material : Glass-Fibre
Magnet Material : Ferrite
Overall Outside Diameter : 4.92"
Baffle Cutout Diameter : 3.64"
Bolt Circle Diameter : 4.45"
# Mounting Holes : 4