With the ART DJ Pre II Phono Preamp, analog input capacitance can be switched between 100pf and 200pf to optimize your phono cartridge response. Switchable low-cut filter removes rumble while front main trim control and signal/clip LED let you optimize the gain for a wide range of input sources. Low-noise circuitry is highly accurate and meets RIAA standard. Rugged, attractive, aluminum, black anodized case. Designed to amplify and EQ your vinyl to interface with your audio workstation, sound card or main monitor system. Accepts variable power input from 7V DC to 12VAC.