Tube guitar amplifier. The GH30R head gives something back to the modern guitar player that for too many years has been overlooked. In a world obsessed by pre-amp distortion, the dark art of power amp distortion has been lost – until now. The GH30R delivers transparent, versatile classic rock tones with the ability to blend in the dynamic characteristic of pre-amp distortion and power amp distortion right there at your fingertips. Both channels on the GH30R produce the same tonal characteristic but how you set them up give you the subtle difference that tone hounds dream about. Whether its funk or melodic rock, whether you’re a hybrid picker or a shredder, the GH30R delivers outstanding, dynamic, complex, harmonically rich controllable tone.