The C12N is one of the most important speakers in Jensen’s history. It is the top 12” speaker of the ‘Blackface Era, used by many American manufacturers in the mid ‘60s for their upper range models when the price of AlNiCo became unsustainable for the manufacturers. Clear highs, solid mids, and powerful basses, it epitomizes the tone of that decade, from the surf, the rock n’ roll, the electric blues and the West Coast inspired music. It was used in Twin, Bassman and Bandmaster style amps, and many others.

Guitarist Description: Smooth and straightforward, full bodied tone with high frequency chime. It responds to overdrive distortion with powerful mid bite.

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

Product Measurements

Diameter: 12 in.
Voice Coil Diameter: 1.5 in.
Depth: 5.0393 in.
Outer Diameter: 12.0866 in.
Inner Diameter: 10.9055 in.
Mounting Hole Bolt Circle Diameter: 11.5551 in.
Magnet Assembly Diameter: 5.2755 in.
Mounting Hole Diameter: 0.2559 in.
Nominal Overall Diameter: 307.00 mm
Nominal Voice Coil Diameter: 38.00 mm
Flux Density: 1.15 T
Voice Coil Winding Depth: 10.00 mm
Magnetic Gap Depth: 8.00 mm
Magnet Type: Ferrite
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): 6.05 Ω
Resonance Frequency (ƒS): 113.00 Hz
Mechanical Q Factor (QMS): 7.52
Total Q Factor (QTS): 1.02
Mechanical Moving Mass (MMS): 29.90 g
Mechanical Compliance (CMS): 66.00 µm/N
Force Factor (BxL): 10.46 Wb/m
Equivalent Acoustic Volume (VAS): 22.60 liters
Linear Displacement, maximum (XMAX): 1.00 mm
Reference Efficiency (nO): 3.48 %
Diaphragm Area (SD): 490.90 cm2
Losses Electrical Resistance (RES): 42.50 Ω
Voice Coil Inductance @ 1 kHZ (LE): 0.90 mH
Rated Power: 50.00 W
Musical Power: 100.00 W
Sensitivity @ 1W, 1m: 97.70 dB