JK: no ja osobne bych 1850HD vubec nevyrazoval a osobne bych si ho poridil radsi nez 2450 nebo J2500, sice ma mensi vykon a je staveny na takovy narocny provoz viz. odpoved na foru QSC: The RMX amplifier model RMX1850HD is a heavy-duty amplifier and designed to drive low load impedances without fear of overheating while the RMX2450 is not. If you plan to use your amplifier to drive a two-ohm load per channel at near clipping level for an extended program, RMX1850HD would be a better choice. (jen pripominam, ze 2ohm na kanal=4ohm bridge).
CCalda: 4050HD je urcite lepsi zesilovac po vsech vyjmenovanych strankach a taky proto stoji 2x tolik. A jestli by se ten cenovy rozdil mel usetrit treba na mikrofonech atd., tak bych do nej nesel..