Jensen Loudspeakers P12R 12'' 25 Watt Vintage Speaker - 16 Ohm

The smallest powered AlNiCo 12" in the range, the P12R is the classic choice for the lower powered combo amps of the tweed era. It was very common in Fender®, Epiphone® and Ampeg® amps until the early '60s. The P12R is bright and colorful, has excellent cut and sparkle, and breaks up easily.

Specifications

General Characteristics
Nominal Overall Diameter: 307 mm (12")
Nominal Voice Coil Diameter: 25 mm (0.98")
Magnet Weight: 200 g (7 oz)
Overall Weight: 1.5 kg (3.31 lbs)
Flux Density: 0.96 T
Voice Coil Winding Depth: 8 mm(0.31")
Magnetic Gap Depth: 6 mm (0.24")

Thiele-Small Parameters
Nominal Impedance: 16Ω
Voice Coil DC Resistance: 12 Ω
Resonance Frequency: 77 Hz
Mechanical Q Factor: 12.53
Electrical Q Factor: 2.67
Total Q Factor: 2.2
Mechanical Moving Mass: 19.9 g
Mechanical Compliance: 214 um/N
Force Factor: 6.68 Wb/m
Equivalent Acoustic Volume: 72.6 lt.
Maximum Linear Displacement: +0.75 mm
Reference Efficiency: 1.19 %
Diaphragm AreaSD: 490.8 cm2
Losses Electrical Resistance: 58 Ω
Voice Coil Inductance @ 1kHz: 0.84 mH

Constructive Characteristics
Magnet: Alnico
Voice Coil Winding: Copper
Voice Coil Former: Kapton
Cone Material: Paper
Surround Material: Integrated Paper
Dust Dome Material: Solid Paper
Basket Material: Pressed Sheet Steel
Surround Treatment: No

Electrical Characteristics
Nominal Impedance: 16 Ω
Rated Power: 25 W
Musical Power: 50 W
Sensitivity@1W,1m: 94 dB