The EBS Valve Drive DI is a professional bass tube preamp that can make your bass sound mellow or aggressive, depending on whether you want it to be melodic or intense. It offers a range from classic tube warmth to stark tube distortion, with a straightforward dial-in approach.

As a preamp, setting the pedal's Gain modestly and the Volume high will transform your solid-state amp into a warm tube amp, giving any dry solid-state tone a rich, warm, and robust sound with noticeable tube compression.

For distortion or overdrive, increase the Gain to have the Valve Drive DI produce a pleasing overdrive or distortion. You can toggle between Vintage and Normal modes and adjust the knobs to fine-tune your sound. The 'flat' setting is achieved when the Bass and Treble are minimized, and the Mid is set to the middle.