Over 42 calculations for pro-audio sound reinforcement and lighting, as well as reference info and utilities. A super handy tool for people dealing with PA, sound reinforcement, sound systems, electroacoustics, pro-audio and lighting The app is very light (~1MB, like a typical mobile phone photo), works offline and uses no data bandwidth More than 42 calculations spread across 26 calculators: - SPL (sound pressure level). Enter sensitivity in dB SPL, power, number of loudspeakers, phase and di