We are an Authorized PYLE Dealer! The PYLE **PDC21** 1/4 Instrument to Balanced & Unbalanced Direct Box is a necessity if you are looking for the higest quality of sound with low distortion noise and eliminate ground loops. A DI unit DI box Direct Box Direct Input Direct Injection or simply DI is an electronic device that connects a high impedance line level unbalanced output signal to a low impedance mic level balanced input usually via XLR connector. DIs are frequently used to connect an electric guitar or electric bass to a mixing console s microphone input. The DI performs level matching balancing and either active buffering or passive impedance bridging to minimise noise distortion and ground loops. DIs do not perform impedance matching. The DC-21 Is One of The Most Useful and Versatile Tools Available Indispensable in Enabling Easy Interfacing and Connection Between Various Audio Gear in Numerous Applications. For the clearest sound use the PYLE **PDC21** 1/4 Instrument to Balanced & Unbalanced Direct Box!