DB12 Active DI Box (18-48V Phantom Powered)Utilizing custom dbx mu metal shielded audio transformers, high quality Neutrik connectors, and low noise circuitry preserves the sonic integrity and true characteristics of the signal source. Both boxes include a pad switch that accomodates instrument, line and even speaker level signals. Take even more control of your sound by utilizing the polarity invert switch to set the phase relationship between the direct and mic\'d sound. As a professional,