From Manufacturer
Designed for use with electric guitar, the classic vintage red, AC15C1 Custom from VOX is a 15W RMS combo amplifier sporting a 12" Celestion G12M Greenback speaker. The amp also boasts a tube-driven preamp, a tube-driven power-amp stage, and two independent channels: Normal and Top Boost. The Top Boost channel offers access to an interactive EQ section—interactive in that the treble knob affects levels of bass and vice versa—while the Normal channel provides a clearer signal path. Whichever channel you choose, the Tone Cut knob across the power-amp stage gives you even more control over your signal's high end. Also, both channels utilize the onboard tremolo and reverb, both of which can be manipulated using a footswitch (available separately).
Turn your attention to the back of the amplifier and you'll see a 1/4" extension jack for powering an extra 16 Ohm speaker, as well as a 1/4" external speaker output. Using the external speaker jack will mute signal to the internal cabinet, though you can hook up both 8 Ohm and 16 Ohm cabinets, so long as you set the impedance switch accordingly. You'll also notice a footswitch input, through which you can toggle reverb and tremolo with the tap of your toes.