The QSC GX3 amplifier features a true Class B biasing system that reduces crossover distortion and is power efficient. GuardRail of this QSC Preamp prevents overheating of speakers with minimum clipping. Subwoofer of this 2 Channel Amplifier reduces the load on full-range speaker, enabling them to play loudly. Having a signal-to-noise ratio of 100 dB, this QSC Preamp eliminates unwanted signals giving a clean audio output. With a frequency response of 20 Hz - 20 kHz, this 2 Channel Amplifier can play wide range of frequencies. The QSC GX3 is capable of handling multiple audio signals giving quality output.