The EXP3x is an 8-channel analog output & DSP expander for the HAL1x (required for operation). Two RAD ports make it a 4-input, 12-output audio device — depending on which two RADs are connected. Thus, 32 daisy-chained EXP3x Expanders provide 256 discrete zone outputs maximum, including output compression, parametric EQ, two levels of paging and background music. Also, eight logic outputs and six DR remote ports are included. Therefore, 32 daisy-chained EXP3x Expanders would provide 64 RAD ports, 192 DR ports and 256 logic outputs.
The dedicated DSP for each of the eight analog outputs offers two signal processing choices independently selectable per output. When you need background music, paging and emergency paging on an output, select the Zone Output processing set. This provides a Zone Processor block, and an Emergency Zone in addition to a Compressor and a 5-band parametric EQ with high- and low-cut filters. When Line Output is selected, the compressor and parametric EQ are available without the zone processing block and emergency paging blocks.