Product Detail Dual Channel / 2 Mic Preamps Front Panel: (2) 1/4 inch HI-Z Inputs for Instrument Direct input Gain Control Knobs (6dB increments) Polarity Invert Switches on each 48 Volt Phantom Power Switches . The "FMR RNP Microphone Preamp" is best product for you. We recommended FMR RNP Microphone Preamp