FREE VST PLUGINS VST Effects Guitar effects Guitar / Amp Bass Preamp. Guitar / Amp Guitar effects VST Effects Bass Preamp. Bass Preamp is an analog tube bass preamp. ON / OFF Switch: Preamp Activation. HARD / SOFT: Preamp Tone Character. X-TRA Lo: Additional Lo Body. Ample Bass P Lite II aim to bring the Fender Precision Bass sound to your studio. The Ample Bass VST plugin is an electric bass vs..