What does "rails" mean?
For example:
"5V at the rails"
"rail to rail amplifiers"
Unless I'm mistaken (I'm still learning here), the rails are the maximum and minimum voltages the amplifier can go to. Whether it's single ended or double ended (one transistor, or two doing push pull), and what the supply DC voltage is will determine this. Of course, by the time you get to the 'rails' you've really distorted your signal...but that's good, to me. Many amplifiers are more efficient and distort the least with lower outputs. I like to turn things up to eleven though. But not for guitars. Look at what your DC supply voltage is, and that's probably the peak to peak output voltage of the amplifier, though it can be less than that depending on the circuit. In fact, it probably will be.
But I may have no idea what I'm talking about.
-Tavys
