The amplifiers of the GX-series are the ideal choice, if one wants the highest possible performance & simple handling. Excellent audio quality & the known QSC reliability speak for themselves. High-quality toroidal transformers ensure a reliable performance of both the amplifiers. They are cooled by a very effective, variable fan. The innovative Guard Rail&trade system protects against damages caused by overloads even at heavy use. In case of excessive clipping or extreme overheating Guard Rail&trade reduces the gain to such an extent that the music remains alomost untouched & the loudspeakers protected.