The CAP66 is an upgrade of the CAP65.The CAP66 is an upgraded version of the CAP65. The CAP66 is a self-checking sound pressure sensor designed to be compatible with the ½-inch standard, allowing the microphone to be calibrated using a standard 94dB calibrator. It features an omnidirectional polar pattern, enabling controlled sound level measurement in all directions. The maximum sound pressure level is 135 dB SPL. Thanks to its built-in preamplifier, it can be installed at a considerable distance in large-scale installations (e.g. auditoriums). Its frequency linearity and measurement accuracy ensure full compatibility with AMIX displays and limiting systems. The CAP66 complies with Class 2 specifications and features an internal adjustment mechanism for calibration.