Built for system integrators, the QSC CXD4.3 Processing Amplifier provides multi-channel amplification with built-in DSP and enough power to drive a wide variety of speaker systems with optimal energy efficiency. Utilizing QSC's Flexible Amplifier Summing Technology (FAST), the CXD4.3's power can be distributed across one to four outputs, as well as drive 70V/100V speaker outputs from all four channels. The 3rd generation Class-D power amplifier design employs PowerLight technology with Power Factor Correction (PFC), which aligns the current waveform with the AC mains voltage waveform. PFC enables the CXD Series amplifiers to draw current from the wall in a more efficient and controlled manner resulting in very high power from a single standard AC breaker. Additionally, the CXD Series amplifiers offer multi-stage sleep modes saving energy when possible without sacrificing performance. The result is a remarkably powerful and flexible platform that offers very high efficiency.