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”.

Guitarist Description: Very warm and full bodied tone with powerful mid-bite and sparkling highs. When presented with overdrive distortion it displays a bright and colorful crunch.

• Lows: Loose
• Mids: Aggressive
• Highs: Bright
• Overdrive: Edgy

Product Measurements

Diameter: 12 in.
Voice Coil Diameter: 1.5 in.
Depth: 6.9448 in.
Outer Diameter: 12.0866 in.
Inner Diameter: 10.9055 in.
Mounting Hole Bolt Circle Diameter: 11.5551 in.
Bell Cover Depth: 3.2047 in.
Mounting Hole Diameter: 0.2559 in.
Bell Cover Diameter: 6 in.
Nominal Overall Diameter: 307.00 mm
Nominal Voice Coil Diameter: 38.00 mm
Flux Density: 1.26 T
Voice Coil Winding Depth: 10.00 mm
Magnetic Gap Depth: 8.00 mm
Magnet Type: Alnico
Voice Coil Winding Type: 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
Voice Coil DC Resistance (Re): 6.03 Ω
Resonance Frequency (ƒS): 90.00 Hz
Mechanical Q Factor (QMS): 4.36
Total Q Factor (QTS): 0.77
Mechanical Moving Mass (MMS): 30.90 g
Mechanical Compliance (CMS): 101.00 µm/N
Force Factor (BxL): 10.62 Wb/m
Equivalent Acoustic Volume (VAS): 34.60 liters
Linear Displacement, maximum (XMAX): 1.00 mm
Reference Efficiency (nO): 3.40 %
Diaphragm Area (SD): 490.90 cm2
Losses Electrical Resistance (RES): 43.00 Ω
Voice Coil Inductance @ 1 kHZ (LE): 0.87 mH
Rated Power: 50.00 W
Musical Power: 100.00 W
Sensitivity @ 1W, 1m: 97.50 dB