Speakon Outputs (CHA / CHB): Professional locking connectors used to secure heavy-duty speaker cables to Channel A and Channel B.Binding Posts (Red/Black): Alternative terminals for bare wire, spade lugs, or banana plugs.Signal Input Options:XLR Inputs (CHA / CHB): Balanced line-level inputs to connect mixers, crossovers, or audio processors.XLR Link Outputs: Pass-through ports to daisy-chain the incoming audio signal to additional amplifiers.Mode Selector Switch:Stereo: Channels A and B operate independently with separate inputs and outputs.Parallel: A single input source drives both channels simultaneously without needing external splitters.Bridge: Combines both channels into a single, much higher-power mono output.