From Sennheiser, the MZA 900 P is an in-line power supply and preamplifier designed for use with pre polarized condenser microphones featuring a 3.5mm mini connection. The MZA 900 P effectively converts 48V phantom power and establishes a 3-pin XLR connection for the Sennheiser E 908B, E 908D, HSP 2, HSP 4, ME 2, ME 3, ME 4, and MKE 2 EW Gold microphones.