no power-supply needed stereo in- and outputs 4-in, 1out mixer 1-in, 4out splitter The PMM-401 is a four channel passive mixer for expanding a mixer with extra line signals. It requires no batteries or other power source. The unit can be used as a 1-in 4-out box then all controls are turned completely clockwise. It is a use full tool that will help you at unforeseen situations.The DAP Pro Audio Solutions are a complete line-up of audio tools for the professional musician or audio engineer. It is a series of audio modifying tools like mini-mixers, pre-amps and converters available in active or passive models. All audio solutions are designed to meet the highest stage and audio demands and feature a metal road proof housing with rubber feet and easy accessible controls. The units also have a small footprint which make them ideal to be used and placed in any environment where space is critical.Jellemzõk:Frequency Response: 20Hz-20KHzInputs: 6,3 TRS Jack,Outputs: 6,3 TRS Jack Input Impedance: 1MegInput Impedance: 50 kOhmOutput Impedance: 12 KOhmDimensions: 53 x 158 x 135 mm (HxWxD)Weight: 0,67 Kg