Their G12C/S speaker is listed as 99.79 d B, while their G12C is listed at 96.10 d B.
The G12C is more than three d B lower, which equates to approximately half the loudness of the C/S.
All Fender amplifiers manufactured from 1990 to the present include a date code, printed on the quality assurance (QA) sticker on the back of the amp chassis.
Another option you might consider: Eminence (eminence.com) makes a speaker called the FDM, which stands for “flux density modulation.” (Yeah, it sounds a little Back to the Future.) It comes in both American- and British-voiced versions and has a very unique feature: a large knob on the rear of the speaker that allows you to adjust the strength of the speaker’s magnetic field, effectively changing its sensitivity. Let’s move on to your Pro Reverb and Twin Reverb amps with hum issues.
Warning: All tube amplifiers contain lethal voltages.
The most dangerous voltages are stored in electrolytic capacitors, even after the amp has been unplugged from the wall.
Fender has used only a handful of different speaker types over the years.
Here’s a list of brands along with their EIA codes.