JENSEN P12N Green
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The AlNiCo P12N is surely one of the most iconic Jensen speakers of the late ‘50s. Visually impressive because of the big bell cover on the magnet, it is the highest powered 12” speaker in the range. Among others, the P12N was used in the high-end amps of the time such as the Fender® Tweed Twin. Crystal clear in the treble range with transparent mids and powerful but tight bass, it is the “King of Clean Tones”.
General Characteristics for 8Ω
Nominal Overall Diameter307 mm12 in
Nominal Voice Coil Diameter38 mm1.5 in
Magnet Weight826 g29 oz
Overall Weight3.1 kg6.83 lbs
Flux Density1.26 T
Voice Coil Winding Depth10 mm0.39 in
Magnetic Gap Depth8 mm0.31 in
Thiele-Small Parameters for 8Ω
Voice Coil DC ResistanceRE6.03 Ω
Resonance FrequencyƒS90 Hz
Mechanical Q FactorQMS4.36
Electrical Q FactorQES0.94
Total Q FactorQTS0.77
Mechanical Moving MassMMS30.9 g
Mechanical ComplianceCMS101 µm/N
Force FactorBxL10.62 Wb/m
Equivalent Acoustic VolumeVAS34.6 lt.
Maximum Linear DisplacementXMAX± 1 mm
Reference EfficiencynO3.4 %
Diaphragm AreaSD490.9 cm2
Losses Electrical ResistanceRES43 Ω
Voice Coil Inductance @ 1kHzLE0.87 mH
Constructive Characteristics for 8Ω
MagnetAlnico
Voice Coil WindingCopper
Voice Coil FormerKapton
Cone MaterialPaper
Surround MaterialIntegrated Paper
Dust Dome MaterialSolid Paper
Basket MaterialPressed Sheet Steel
Surround TreatmentNo
Electrical Characteristics for 8Ω
Nominal Impedance8 Ω
Rated Power50 W
Musical Power100 W
Sensitivity@1W,1m97.5 dB
General Characteristics for 16Ω
Nominal Overall Diameter307 mm12 in
Nominal Voice Coil Diameter38 mm1.5 in
Magnet Weight826 g29 oz
Overall Weight3.1 kg6.83 lbs
Flux Density1.26 T
Voice Coil Winding Depth10 mm0.39 in
Magnetic Gap Depth8 mm0.31 in
Thiele-Small Parameters for 16Ω
Voice Coil DC ResistanceRE12 Ω
Resonance FrequencyƒS91 Hz
Mechanical Q FactorQMS5.77
Electrical Q FactorQES0.98
Total Q FactorQTS0.84
Mechanical Moving MassMMS27 g
Mechanical ComplianceCMS125 µm/N
Force FactorBxL13.71 Wb/m
Equivalent Acoustic VolumeVAS42.2 lt.
Maximum Linear DisplacementXMAX± 1 mm
Reference EfficiencynO2.84 %
Diaphragm AreaSD490.8 cm2
Losses Electrical ResistanceRES70 Ω
Voice Coil Inductance @ 1kHzLE1.05 mH
Constructive Characteristics for 16Ω
MagnetAlnico
Voice Coil WindingCopper
Voice Coil FormerKapton
Cone MaterialPaper
Surround MaterialIntegrated Paper
Dust Dome MaterialSolid Paper
Basket MaterialPressed Sheet Steel
Surround TreatmentNo
Electrical Characteristics for 16Ω
Nominal Impedance16 Ω
Rated Power50 W
Musical Power100 W
Sensitivity@1W,1m97.8 dB
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