User manual CROWN XS500 DATASHEET

[. . . ] Xs SERIES Xs500 AC Power Draw and Thermal Dissipation Here are the equations used to calculate the data presented in Figure 1: This document provides detailed information about the amount of power and current drawn from the AC mains by the Crown® Xs500 amplifier and the amount of heat produced under various conditions. [. . . ] · Duty cycle of highly compressed rock `n' roll midrange is 40%. · Duty cycle of infrequent, short duration paging is 1%. The quiescent power draw of 36. 0 watts is a maximum value and includes power drawn by the fan. The following equation converts power draw in watts to current draw in amperes: The value used for Power Factor is 0. 83. The Power Factor variable is needed to compensate for the difference in phase between the AC mains voltage and current. The following equation is used to calculate thermal dissipation: The value used for inefficiency is 0. 39 (1. 00­0. 61). Thermal dissipation in btu is divided by the constant 3. 968 to get kcal. [. . . ] Crown and Crown Audio are registered trademarks of Crown International, Inc. [. . . ]