General Characteristics for 8Ω
Nominal Overall Diameter306 mm.12 in.
Nominal Voice Coil Diameter25 mm.1.00 in.
Magnet Weight270 g10.00 oz
Overall Weight3.09 lbs
Flux Density1.00 T
Voice Coil Winding Depth0.31 in.
Magnetic Gap Depth0.24 in.
Thiele-Small Parameters for 8Ω
Voice Coil DC ResistanceRE6.70 Ω
Resonance FrequencyƒS88.3 Hz
Mechanical Q FactorQMS18.52
Electrical Q FactorQES2.06
Total Q FactorQTS2.47
Mechanical Moving MassMMS29.5 g
Mechanical ComplianceCMS110 µm/N
Force FactorBxL6.24 Wb/m
Equivalent Acoustic VolumeVAS37.5 lt.
Maximum Linear DisplacementXMAX±0.80 mm
Reference EfficiencynO1.20 %
Diaphragm AreaSD490.9 cm2
Losses Electrical ResistanceRES67.0 Ω
Voice Coil Inductance @ 1kHzLE0.49 mH
Constructive Characteristics for 8Ω
Voice Coil WindingCopper
Voice Coil FormerKapton
Cone MaterialPaper
Surround MaterialIntegrated Paper
Dust Dome MaterialFelt
Basket MaterialPressed Sheet Steel
Surround TreatmentNo
Electrical Characteristics for 8Ω
Nominal Impedance8 Ω
Rated Power25 W
Musical Power50 W
Sensitivity@1W,1m92.3 dB
25 watts
  • Ohms:

Warm low and mid response with smooth/bright highs. When presented with overdrive distortion, it presents smooth crunch with low-end focus.

Warm low and mid response with smooth/bright highs. When presented with overdrive distortion, it presents smooth crunch with low-end focus.
Warm and thick
Sound Samples:
Clean Sound Sample00:18https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_clean_0.mp3
Overdriven Sound Sample00:19https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_overdriven_0.mp3
Blues Sound Sample00:49https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_blues.mp3
Country Sound Sample00:35https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_country.mp3
Jazz Sound Sample00:43https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_jazz.mp3
Metal Sound Sample00:55https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_metal.mp3
Rock Sound Sample00:41https://www.jensentone.com/sites/jensentone.com/files/sound_samples/c12r_rock.mp3
Having trouble playing our sound samples? Click here to access the files directly.

User Reviews

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I re-cabbed a Gibson GA15 into a custom made Mather cab modeled on Fender Deluxe 212. I used 2 C12R speakers and the sound is gigantic! The class A 15 watts from the Gibson through these speakers is beyond belief. I did use 2 Weber Beam Blockers to smooth the highs. These are fantastic speakers.

I just replaced the original C12R in my 1962 Gibson Falcon GA19RVT with a reissue C12R, after 46 years the original was a little tired. Good move! This reissue is the ticket!!