The EBS Valve Drive is a professional bass effects unit with an overdrive function. – Dual Mode Tube Overdrive/Preamp DI The EBS Valve Drive is a bass preamp/overdrive that uses a vacuum tube. By using the Valve Drive, you can get a warm sound with natural distortion. The new version also includes a DI function. The tone control is a classic passive type that fits the bass sound. Also, you can select the sound character with the VINTAGE footswitch. Used twice in total, for practice and live performances. - Model Name: Valve Drive - Brand: EBS - Function: Overdrive - Input Terminals: 1/4 inch input - Output Terminals: 1/4 inch output - Power: 12V AC 500mA - Controls: Volume, Treble, Middle, Bass, Gain - Switches: Vintage, Active Thank you for viewing.