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The CSM 28 - Eight Inputs/Two Outputs Commercial Series Mixer by JBL is backed by the combined technological prowess of multiple Harman brands and can be easily configured for a wide range of applications such as providing background music, security, and paging in schools, hospitals, restaurants, and fitness facilities. For I/O, the mixer features Euroblock type mic/line input and output connectors, as well as unbalanced RCA inputs. The chassis features illuminated rings that makes them easier to see and use for the dedicated volume, bass, and treble controls. The rear panel of the mixer features an array of DIP switches for configurable input/output routing.
The mixer features RJ45 connectors for use with the company's CSR-V in-wall volume controls (sold separately), as well as a universal power supply that accepts AC voltages from 100 to 240 VAC, 50/60 Hz. It was built using Harman's GreenEdge clean standards to offer numerous energy-efficient benefits, including a lighter weight, space-saving design that conforms to RoHS standards.