JENSEN Vintage Alnico P8R 4 Ohm Speaker

Warm clean tone with emphasis on the highs. It responds to overdrive distortion with a warm and bright fuzz lead voice.

General Characteristics
Nominal Overall Diameter 207 mm 8 in
Nominal Voice Coil Diameter 25 mm 1 in
Magnet Weight 200 g 7.0 oz
Overall Weight 2.65 lbs
Flux Density .96 T

Thiele-Small Parameters
Voice Coil DC Resistance RE 6.70 Ω
Resonance Frequency ƒS 130 Hz
Mechanical Q Factor QMS 9.18
Electrical Q Factor QES 2.30
Total Q Factor QTS 1.84
Mechanical Moving Mass MMS 9.3 g
Mechanical Compliance CMS 161 µm/N
Force Factor BxL 4.72 Wb/m
Equivalent Acoustic Volume VAS 10.3 lt.
Maximum Linear Displacement XMAX 1.0 mm
Reference Efficiency nO 0.95 %
Diaphragm Area SD 213.8 cm2
Losses Electrical Resistance RES 27 Ω
Voice Coil Inductance @ 1kHz LE 0.36 mH

Constructive Characteristics
Magnet AlNiCo
Voice Coil Winding Copper
Voice Coil Former Epotex
Cone Paper
Surround Integrated Paper
Dust Dome Treated Cloth
Basket Pressed Sheet Steel

Electrical Characteristics
Nominal Impedance 8 Ω
Rated Power 25 W
Musical Power 50 W
Sensitivity@1W,1m 92.5 dB