The Vox Valvetronix VT20X uses VET (Virtual Elements Technology) and the Valvetronix Valve Reactor preamp (with 12AX7 preamp tube) to deliver stunning sound quality. Features include 11 amp models, 13 effects, 33 preset programs (60 when using the editor/librarian software), including signature sounds of famous guitarists. Amp may also be customized with Tone Room editor/librarian software with Windows/Mac/IOS/Android compatibility. 20 watts, single 8" 5 ohm speaker. Uniquely styled offset design with a tightly sealed chassis and a proprietary bass-reflex structure for great low end without creating unwanted resonances. Black covering with black Vox Diamond grill cloth. Optional VFS5 5-button footswitch may be used for changing presets, effect settings and tap tempo function.