The ART DUALZDirect Professional Passive Direct Box is the 2-channel version of the ART Zdirect. It's a high-quality totally passive interface that lets you connect instrument, line, or speaker-level signals to a mixer or other balanced input thru a high-performance audio isolation transformer. A pair of high-impedance single-ended 1/4" inputs are converted by the transformer into an isolated balanced low-impedance signal source. The DUALZDirect has an extremely flat and wide frequency response and can handle high signal levels while still maintaining an isolated balanced low-impedance output. This gives the DUALZDirect a very clean and neutral sound with a wide variety of signal sources and over long signal runs in high-noise environments.