By combining years of innovation, invention and insight from Harman, JBL amplifiers go well beyond the expected in generating powerful sound. The efficient performance of Crown's DriveCore technology continues to set standards in commercial power amplifier technology. Simple to configure, the CS amp provides a DriveCore-based sound solution. Supporting installations out of the box, CS amps feature RJ-45 connectors for use with JBL CSR-V in-wall volume controls. And with Harman's GreenEdge environmental initiative, CS amps quickly pay for themselves in energy savings.