These new amplifiers also feature a multi-stage Valvetronix tube preamp. This preamp design incorporates authentic analog circuitry to achieve the subtle tonal adjustments and capture the nuances that are distinctive of vacuum tube amps. In addition to this clever circuitry, VTX amplifiers feature a tightly sealed cabinet and a proprietary bass-reflex designed to deliver stunning resonance. Go beyond the realm of previous modeling amps with the new VOX Tone Room editing software that lets you customize the existing amps and effects yourself, or create your own! VTX amps are equipped with a USB port for simple integration with a PC, Mac, or even iOS & Android platforms and works seamlessly with the new VOX Tone Room software for deep editing of your favorite amp models, effects and presets! Tone Room is available to download on your PC, Mac via the Support tab of this page and is also available for your iOS and Android devices via the App Store or Google Play! Features The multi-stage tube amplifier circuit in the pre-amp allows the VT20X to reproduce the unique distortion, touch sensitivity, and the response that is characteristic of classic tube amps. The revamped algorithm recreates analog circuits and allows users to adjust parameters such as the gain and bias (operating point) of the tube in real time, resulting in an authentic amplifier experience. When using certain models, the amp can be switched between Class A and Class AB operation and, by altering the impedance variation of the speaker, it can reproduce a sound unique to a tube power amplifier. Manage programs and customize amps and effects by using the included Editor/Librarian software that is compatible with Windows, Mac or iOS. The power level control lets you adjust the output wattage of the power amp. Sophisticated modeling technology is used to provide numerous amp models and high-quality effects. You can simultaneously use up to four effects including noise reduction. Create your custom sound using the desired amp and effect combination, then easily save it as one of eight programs (two banks √ó four channels). Saved programs can easily be switched from the top panel or with an optional foot switch (sold separately). For each amp model, three preset programs with preset songs are provided to reproduce the tones of classic hits played by famous guitarists. Manual mode lets you use the VT20X as a conventional guitar amp. The physical positions of the actual knobs will be reflected in the sound. The built-in tuner allows for easy tuning of your guitar. The AUX IN jack allows you to connect an external audio player, allowing you to play guitar along with recorded music. Specifications OUTPUT POWER 20 Watts RMS 5 Ohms SPEAKER 1 x 8? Standard Speaker INPUTS 1 x Normal Input Jack 1 x Aux Input Jack 1 x Foot Switch Jack 1 x USB (type B) Mini Port OUTPUTS 1 x Headphone Jack CONTROLS Power Level, Volume, Gain, Bass, Middle, Treble, Amp Model Selector, 5 x User Defined Selectors, 3 x Effects Selectors, 2 x User Defined Value Knobs, Bias Shift, Class Selector AMP MODELS 11 (20 when using Vox Tone Room Software) EFFECTS Pedal 1 type: 4 (COMP, CHORUS, OVERDRIVE, DISTORTION) Pedal 2 type: 4 (FLANGER, PHASER, TREMOLO, DELAY) Reverb type: 4 (ROOM, SPRING, HALL, PLATE) Noise Reduction: 1 PROGRAMS 33 (60 when using Vox Tone Room Software) 8 User Programs (2 banks x 4 channels) SIGNAL PROCESSING A/D conversion: 24-bit D/A conversion: 24-bit DIMENSIONS (W X D X H) 410 x 225 x 347 mm | 16.14 x 8.86 x 13.66 inches 7.3 kg | 16.09 lbs ACCESSORIES (SOLD SEPARATELY) VFS5 Foot Switch WATCH: Introducing the all new VOX VTX Series!