The VT Bass 500 is a 500-Watt bass amp head, with an all-analog SansAmp™ pre-amp and Class D power amp. It is formulated with the same proprietary technology as our SansAmp Character Series VT Bass DI pedal. The unique Character control sweeps through decades of some of the most distinctive bass amp tones on the planet. Drive adjusts the overall amount of gain and overdrive, similar to when the output of a tube amp is being pushed. A Blend control allows you to blend the direct instrument signal with the SansAmp Tube Amplifier Emulation circuitry. The Bite switch activates a presence boost, which tightens up the sound when you are in distorted settings. It also adds definition to your notes when playing in cleaner settings.