The C12K2 utilizes the same hardware as the classic Jensen C12K but features a "seamless" cone. This seamless cone contributes to a more harmonically rich and smoother tone while maintaining the original character of the classic C12K.

The C12K is recognized as the stock speaker for the Fender Deluxe Reverb® Reissue and the Fender Twin Reverb® Reissue. It is a high-power variant of the C12N, making it the ideal choice for the later Fender Twin Reverb® rated at 135W RMS. The substantial 2" voice coil affords a lot of headroom, depth, and a subtle top end.

It is very similar to the C12N but offers a somewhat smoother top end and a 100W RMS power handling capacity, making it very appealing for Overdrive/Distortion sounds.