Audio-Technica AT4033/CL Cardioid Condenser Microphone Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients Precision-machined, nickel-plated brass, acoustic element baffle provides enhanced element stability and optimal sensitivity The 2-micron-thick, vapor-deposited gold diaphragm undergoes a five-step aging process so that the optimum characteristics achieved remain constant over years of use Floating-construction capsule assembly provides isolation from noise and vibration Open acoustical environment of the symmetrical housing assembly minimizes unwanted internal reflections