Passive direct box. It is a passive direct box that features custom dbx mu-metal-shielded audio transformers, high-quality Neutrik connectors, and low-noise circuitry. The dB10 direct box includes a pad switch that accommodates instrument, line, and even speaker level signals. Take even more control of your sound by utilizing the dB10 passive direct box's polarity invert switch to set the phase relationship between the direct and the mic'd sound.