The E3243A, 4-Channel Microphone/Voltage Breakout Box, is specifically designed to interface microphones (as well as voltage and 4 mA constant current power supply accelerometers) to the high performance E1432A and E1433B VXI Digitizer modules. It integrates 4 channels of signal conditioning in one box, reducing the count of transducer conditioning equipment needed for both small and large channel-count VXI systems. Applications include both acoustic and mechanical measurements. It has two input connector types per channel to match the intended transducer connection, as well as buffered outputs via BNC connectors for signal monitoring or recording.