Форум гитаристов

А если у аппарата есть мг, есть ли смысл в этой педальке?

E.W.S. Subtle Volume Control or SVC is a device based on Scott Henderson’s idea, which provides better control of your overall volume than a traditional volume pedal. With subtle increases or decreases in volume, your audience may never realize that you’ve changed your volume.

The SVC goes in your amp effects loop. This allows you to control your volume without changing the gain you have dialed in at the front of the Preamp. The SVC can also be used between your last pedal and the front of the amp, but keeping your gain consistent while changing volume will not be as effective.

и как эта цепь компенсации позволяет раскачивать мощник, находясь при этом в петле?

This allows you to control your volume without changing the gain you have dialed in at the front of the Preamp.