Warm Audio brings a passive DI box with a built-in CineMag Transformer. It converts instruments sound without any signal degradation. Direct Box Passive is constructed with top-tier discrete components housed in rugged aluminum chassis which includes switches, knobs and connectors that are all designed to withstand heavy abuse on the road or in the studio. Direct Box Passive is best for balancing the signal of instruments with active electronics, but still performs extremely well on passive pickups. It provides a Thru-put jack that is jumpered to the input jack.