guitarcab.com№ 059June ’26
Speaker review · 12-inch ceramic
Blackface-era American · High wattage
Jensen
C12K.
A session-clean twelve — clean headroom past gig volume.
Fig. 01 - SPL response, on axis, 1m
Jensen quality without Jensen character.
The C12K's voice is the most linear in the Jensen catalogue — a modest mid scoop, a small presence rise, and a gentle rolloff top and bottom. No piercing bite, no ice-pick edge, no honky bark. Where the rest of the C-series colours the signal with its own voice, the C12K steps back. For players running a voiced amp or pedalboard who want their tone shaped by the upstream signal, not by the speaker.
Vocal barkNarrowFalling tilt