|Nominal Overall Diameter||306 mm||12 in|
|Nominal Voice Coil Diameter||32 mm||1.26 in|
|Magnet Weight||426 g||15 oz|
|Overall Weight||1.8 kg||3.97 lbs|
|Flux Density||0.92 T|
|Voice Coil Winding Depth||9 mm||0.35 in|
|Magnetic Gap Depth||6 mm||0.24 in|
|Voice Coil DC Resistance||RE||6 Ω||12 Ω|
|Resonance Frequency||ƒS||87.5 Hz||86 Hz|
|Mechanical Q Factor||QMS||12.95||10.16|
|Electrical Q Factor||QES||2.47|
|Total Q Factor||QTS||2.23||1.99|
|Mechanical Moving Mass||MMS||29.7 g||24.3 g|
|Mechanical Compliance||CMS||111 µm/N||137 µm/N|
|Force Factor||BxL||6.03 Wb/m||8.16 Wb/m|
|Equivalent Acoustic Volume||VAS||38 lt.||46.3 lt.|
|Maximum Linear Displacement||XMAX||± 1.5 mm||± 1.5 mm|
|Reference Efficiency||nO||1.45 %||1.2 %|
|Diaphragm Area||SD||490.9 cm2||490.8 cm2|
|Losses Electrical Resistance||RES||43.2 Ω||50 Ω|
|Voice Coil Inductance @ 1kHz||LE||0.63 mH||0.95 mH|
|Voice Coil Winding||Copper|
|Voice Coil Former||Epotex|
|Surround Material||Integrated Paper|
|Dust Dome Material||Solid Paper|
|Basket Material||Pressed Sheet Steel|
|Rated Power||35 W||35 W|
|Musical Power||70 W||70 W|
|Sensitivity@1W,1m||93.2 dB||93.9 dB|
Following the heritage of the P12Q, the C12Q is one of the most versatile speakers in the Vintage range. Powerful enough for a cranked Deluxe-style amp yet balanced and warm, it surely is not lacking in bite. It has been used in both single and twin configurations by countless manufacturers including Fender®, Ampeg®, Silvertone® and Supro®, just to name a few.
After being disappointed by lots of dull and flat sounding speakers universally praised as true '50s and '60s Jensens replicas, I've put a Jensen C12Q RI on my self-made Deluxe Reverb and I've finally started hearing what I was expecting - sparkling, chime, incredible touch response, strong attack and gritty 3D overdrive. It was immediately followed by a P12R on my Tweed Deluxe and a P8R on Tweed Champ, with great satisfaction. Everything you read around on forums, about how new Jensens sound nothing like the old ones, is pure bull from deaf people: if you crave authentic vintage Fender sound, this is it.
I now run the C12Q in a 1x12 50 watt early 70s non-master-volume English-made 1x12 combo. It loves being driven hard and sounds superb for it! It has a beautiful natural compression that is sweet and usable. The best thing about Jensen vintage ceramics is the low dB ratings. The C12q is 93 dB which is perfect. Modern speakers are simply too loud for vintage amps
over 15/20 watts! 97/98 dB upwards is crazy for anyone like me who enjoys vintage amps 'output valves', cranked up natural tones without tap dancing on a load of pedals all night! Don't be fooled by the small magnet on this speaker, its a wolf in sheep's clothing and really comes to life driven hard for the best vintage tone possible! Good on you all at Jensen!
I have a 1966 Fender Deluxe Reverb who's speaker gave up the ghost. Knowing that Jensen had reissues of their vintage speakers, I purchased a C12Q for my amp. When I fired that baby up with the new speaker it was like a trip back in time. The tone was tight, focused and warm, all the things a great Fender Deluxe should be and for the price, I'm not afraid to get after it a little.
Here it is - Installed a Jensen Vintage Ceramic C12Q last year in a 5e3 kit amp. I tried other speakers to include small plug magnet alnicos. But the sound of the C12Q works the best for all volume levels of this amp. I tried the more powerfull ceramics and they sounded muddy at lower to moderate volumes. The light weight alnicos sounded too thin and had no punchy bass. IMO The C12Q is just right for all volumes and it realy handles the higher volume crunch very well: No flubby bass, and no crackling. It took me about 6 months to break it in at loud volumes, and now the speaker sounds a lot smoother than before and can handle higher volumes better. Some think that Alnicos are the way to go with a 5e3, but the C12Q does better than more expensive speakers in a 5e3.
I load combos 2x12 & 4x12 cabs with used, vintage Jensens. Currently, I'm running a Sovtek MIG100H into a 4x12 cabinet loaded with four 35-watters. Great tone & response..nuff said
Upon a recommendation from another jukebox collector, I purchased two C12Q speakers and installed them in my 1967 Seeburg jukebox. They sound terrific, much like the originals! Exact fit, and excellent tonal qualities for a vintage jukebox.