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.