An AMP (Amplifier), specifically a power amplifier, works by taking a weak electrical signal and boosting it to a much higher voltage, making it more usable. The key is that the amplified output signal retains the exact same waveform as the original input signal.
Here's a breakdown of the process:
- Input Signal: A weak electrical signal from a source like a preamplifier, audio interface, or musical instrument is fed into the power amplifier.
- Power Source: The power amplifier is connected to a power source, typically a mains wall socket, which provides the necessary power for amplification.
- Amplification: The amplifier uses the power from the power source to increase the voltage and current of the input signal, without changing its shape or frequency characteristics. As mentioned in the reference, the goal is to output an electrical signal with the exact same waveform as the input signal.
- Output Signal: The resulting amplified signal is now strong enough to drive a load, such as a speaker, headphones, or other electronic devices.
In essence, the power amplifier acts as a signal strengthener, making a low-power signal powerful enough to perform a desired task. It takes the input signal and makes it much stronger using external power.
