Jensen Vintage Alnico Series
P12R
12", 25 watts, 8/16 Ω
Straightforward, bright tone.
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General Characteristics |
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| 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 | |
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Thiele-Small Parameters |
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| Voice Coil DC Resistance | RE | 6.00 Ω |
| 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 Ω |
| Voice Coil Inductance @ 1kHz | LE | 0.50 mH |
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Constructive Characteristics |
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| Magnet | AlNiCo | |
| Voice Coil Winding | Copper | |
| Voice Coil Former | Kapton | |
| Cone | Paper | |
| Surround | Integrated Paper | |
| Dust Dome | Solid Paper | |
| Basket | Pressed Sheet Steel | |
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Electrical Characteristics |
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| Nominal Impedance | 8 Ω | |
| Rated Power | 25 W | |
| Musical Power | 50 W | |
| Sensitivity@1W,1m | 95.0 dB | |
