Product DescriptionWhether you play guitar, bass, keyboards or another stringed instrument, you'll need a direct box that won't diminish your instrument's tone, like the Direct Box Active from Warm Audio. Built around world-famous CineMag USA Transformer topology and engineering, like no other DI Boxes in the world. Constructed with top-tier discrete components housed in rugged aluminum chassis' that include switches, knobs and connectors that are all designed to withstand heavy abuse on the road or in the studio.From the ManufacturerWarm Audio DI boxes offer the rare versatility of having an onboard variable pad knob which attenuates your input signal all the way from -3dB to -30dB, which will easily tame any instrument input source. Active VS passive? The Active Direct Box offers a Thru-put jack that is jumpered to the input jack. It is a convenience jack allowing you to send your instrument's signal to a second place in addition to the live mixer or recording device. Our Direct Boxes can also take a recorded signal at line level and send it to another line input while simultaneously sending signal out of the XLR mic level output of the Direct Box. What is a DI Box? The DI Box versatility allows you to connect instruments such as guitar, bass, keyboard, or drum machines directly to a PA or recording system. Simply put, a DI box converts the high impedance, unbalanced output signals to low impedance, balanced output signals. By doing so, the instrument signals are now converted to the proper voltage level for the PA or recording system - which greatly reduces and/or eliminates connections that could cause tonal shifts and distortion.