The g4m ga 20e guitar amp head is a solid state amplifier that offers a range of features to help you shape your sound. The amplifier has a clean channel as well as four drive channels with its own independent volume control. Additionally the drive channels offer a global gain control that lets you determine the amount of distortion present in your signal. To make quick tonal adjustments the ga 20e features a global 3 band fixed frequency eq that allows you to adjust the bass middle and treble frequencies. If you want to play along with your favourite songs the g4m ga 20e guitar amp head features an aux input that lets you connect your mobile device. When you need to practice silently the headphone output allows you to do so without disturbing those around you. The amplifier also features a footswitch connection point allowing you to integrate the g4m 5 button footswitch not supplied so you can effortlessly change tones mid performance. You can also add depth to your sound via the onboard reverb control.