It simultaneously deploys sophisticated digital processing with optimal energy and rack space efficiency. This 4-channel amplifier with onboard DSP has the capability to configure and combine channels in various ways to drive a wide range of loudspeaker systems including 70V and 100V without the use of transformers. This amplifier not only provides the power and processing to make your system perform better, it also offers efficiency ensuring that energy consumption will be kept to a minimum over the life of the installation.

The CXD4.3 Processing Amplifier features FAST (Flexible Amplifier Summing Technology) that actively distributes the total amplifier power in various configurations across 1, 2, 3, or all 4 outputs. Moreover, this power can also be used to drive 70 or 100V speaker lines directly from any 1 or all of the 4 outputs. This flexibility allows this amplifier to drive (for example) 2 full-range surface mounted speakers along with a subwoofer and a 100V distributed speaker line; or a high-power subwoofer and a bi-amplified full-range loudspeaker; three 70V distributed speaker lines and a low impedance surface mount speaker line; or a single high-power channel driving monster subwoofers.

This amplifier uses QSC's class-D power amp design in combination with a custom power stage utilizing an output device. This purpose-built MOSFET device provides high voltage operation without needing a full bridge output and offers good audio quality and thermal performance due to co-location of the semiconductors.

The CXD4.3 Processing Amplifier benefits from the PowerLight power supply and PFC (Power Factor Correction) that aligns the current waveform with the AC mains voltage waveform. PFC enables the amplifier to draw current from the wall in an efficient and controlled manner resulting in power from a single standard AC breaker.