The Jensen P12R 4ohms offers a warm clear tone and rounded highs.
Classic speaker for Juke Box and low watt guitar amplifiers

Nominal overall diameter: 12"
Magnet material: AlNiCo
Lows: Loose
Mids: Firm
Highs: Bright
Overdrive: Edgy / Crunchy

General Characteristics
Nominal Overall Diameter 306 mm 12 in
Nominal Voice Coil Diameter 25 mm 1 in
Magnet Weight 200 g 7.0 oz
Overall Weight 3.55 lbs
Flux Density 0.96 T

Thiele-Small Parameters
Voice Coil DC Resistance RE 6.00?
Resonance Frequency ƒS 80.0 Hz
Mechanical Q Factor QMS 12.73
Electrical Q Factor QES 2.09
Total Q Factor QTS 1.79
Mechanical Moving Mass MMS 20.3 g
Mechanical Compliance CMS 196 µm/N
Force Factor BxL 5.55 Wb/m
Equivalent Acoustic Volume VAS 66.4 lt.
Maximum Linear Displacement XMAX 1.0 mm
Reference Efficiency nO 1.56 %
Diaphragm Area SD 490.8 cm2
Losses Electrical Resistance RES 39.0 ?
Voice Coil Inductance @ 1kHz LE 0.50 mH

Constructive Characteristics
Magnet AlNiCo
Voice Coil Winding Copper
Voice Coil Former Kapton
Cone Paper
Surround Integrated Paper
Dust Dome Solid Paper
Basket Pressed Sheet Steel

Electrical Characteristics
Nominal Impedance 4ohms
Rated Power 25 W
Musical Power 50 W
Sensitivity@1W,1m 95.0 dB