C12R
| Nominal Overall Diameter | 306 mm | 12 in |
| Nominal Voice Coil Diameter | 25 mm | 0.98 in |
| Magnet Weight | 270 g | 10 oz |
| Overall Weight | 1.4 kg | 3.09 lbs |
| Flux Density | 1 T | |
| Voice Coil Winding Depth | 8 mm | 0.31 in |
| Magnetic Gap Depth | 6 mm | 0.24 in |
| Nominal Impedance | 8Ω | |
|---|---|---|
| Voice Coil DC Resistance | RE | 6.7 Ω |
| Resonance Frequency | ƒS | 88.3 Hz |
| Mechanical Q Factor | QMS | 18.52 |
| Electrical Q Factor | QES | 2.85 |
| Total Q Factor | QTS | 2.47 |
| Mechanical Moving Mass | MMS | 29.5 g |
| Mechanical Compliance | CMS | 110 µm/N |
| Force Factor | BxL | 6.24 Wb/m |
| Equivalent Acoustic Volume | VAS | 37.5 lt. |
| Maximum Linear Displacement | XMAX | ± 0.8 mm |
| Reference Efficiency | nO | 1.2 % |
| Diaphragm Area | SD | 490.9 cm2 |
| Losses Electrical Resistance | RES | 67 Ω |
| Voice Coil Inductance @ 1kHz | LE | 0.49 mH |
| Magnet | Ferrite | |
| Voice Coil Winding | Copper | |
| Voice Coil Former | Kapton | |
| Cone Material | Paper | |
| Surround Material | Integrated Paper | |
| Dust Dome Material | Felt | |
| Basket Material | Pressed Sheet Steel | |
| Surround Treatment | No |
| Nominal Impedance | 8Ω | |
|---|---|---|
| Rated Power | 25 W | |
| Musical Power | 50 W | |
| Sensitivity@1W,1m | 92.3 dB |
Typically used in the lower powered 12” amps for studio or practice, the C12R is a clear sounding, sparkling speaker, very sensitive to the character of amplifier. When paired with a stout, rich and warm electronic design it can do wonders. Ampeg® Jets and Reverberockets are just some of the most revered amps that carried C12R as their factory choice.
I used this in a 5E3 clone, and wow! What a great Tweed sound this speaker yields! With sparkling highs, authoritative mids, and tight lows, it makes my Strat spank and quack, and turns my ES-150 into a throaty monster archtop.
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!!
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.
