The Vox V9168R 15-watt guitar combo amplifier not only looks god but also dramatically enhances the tone of your guitar. Besides gain, volume, treble, and bass controls, the Vox V9168R guitar combo amplifier houses a wonderful sounding, vintage Tremolo effect. Additionally, this Vox guitar amplifier has a spring reverb system with a reverb control that adjusts the level of the effect and a boost switch that increases gain and overdrive. The headphone jack of this Vox guitar amplifier mutes the internal speaker and offers a silent practice option.