I have a question about my guitar amplifier-a Roland JC-120?
Ever since the day I bought it, when it's on, I hear a low white noise. When I record it, you can hear the noise/static. When I turn the voume up, you can also hear static as you turn

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sounds like a pot is fouled. take to an electronic tech and they can either clean it or replace it. the JC-120 is really known for its clean and loud sound.

I have to write a technical description for class on a guitar amplifier but I'm not familiar with them. Im specifically writing on the Roland Cube-15x because it looks the simplest (I'll take recommendations). As of now I have no idea where the power

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If a device is going to add gain to a signal, then it has to have some type of power source. Be it AC or battery powered, you have to get the extra energy from somewhere.

I'm not familiar with the Roland amp, but they all work in a similar

Ever since the day I bought it, when it's on, I hear a low white noise. When I record it, you can hear the noise/static. When I turn the vloume up, you can also hear static as you turn the knob. It's been that way since the day I purchased it. Is it normal?

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Do you have any pedals in the chain? Do you have the amp's built in distortion on? Pedals can normally weaken the signal and cuase hum or buzz, and distortion always gives a low buzz no matter what you do. If both are not causing it, a good...