Pyle PDC22 is a necessity if you are looking for the highest quality of sound, with low distortion, and 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 minimize noise, distortion, and ground loops. DIs do not perform impedance matching. Pyle has been in business for over 35 years, and its manufacturing experience and expertise are easy to see and hear. It provides a variety of DI solutions with its inch device connector and detachable AC power cord for live sound recording applications. It allows you to easily connect keyboards, guitars, and outboard, signal processors. Useful for connecting unbalanced signals from sources sub mixers, effects processors, and keyboards to a main PA or recording mixer. This impedance transformer also has buzz and hum cancellation ability. Getting the signal of a musical instrument to the PA system is easier with this direct box. Just connect the electric bass, guitar, keyboard, or other processors to the ground lift adapter and enjoy pure and clean audio. Aside from music instruments, the DI unit can also be connected to the line output of a boom box or consumer stereo system if you want to sample old records.