Pre Amp
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What exactly is the difference between a power amp and a pre amp???
I have always used combos and don't know a lot about using separate units. Can someone explain to me the difference between the power amp and pre amp and also what your typical chain from the amp to a speaker cab would be. Thanks very much
The preamp of an amplifier is used to "color" the tone. For example, your tone controls (treble, mid, bass) are located in the preamp, as is the reverb. The preamp's purpose is to shape the sound, then feed it to the power amp. The preamp usually consists of one to nine preamp tubes, depending on the amp.
The power amp takes the signal from the preamp then does most of the amplification that will "drive" the speaker. The power amp's original purpose was to only make the preamp signal "louder," though the power amp also colors the tone. The power amp has at least one power tube, though usually two or four, and also consists of an output transformer and a phase inverter.
in a nut shell....the power amp powers the speakers and the pre amp gives it the extra power and range you could need.....hope that helps
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