MAT1 Mic Adaptor (Unbalanced Mic to Balanced Input)The MAT1 is designed to interface an unbalanced electret microphone to a balanced microphone input with +15V phantom power such as those found on Ampetronic equipment. The unit has unity gain and provides correct bias voltage to the electret microphone. Compatible Audio Induction Loop Drivers: ILD122, ILD300, ILD500, ILD1000G, CLS Series, MLD Series, D Series & C Series Product Features Inputs: 3. 5mm 2 pole unbalanced jack socket Output: 3 pin