Brand: RTI (Remote Technologies Incorporated) Model: AD-4 multi-zone audio distribution system / amplifier. Black metal chassis designed for custom-install or rackmount multi-room audio, providing 4 zones / 8 channels with 4 analog stereo source inputs. Details: Front panel power button with blue status LED, zone 1–4 controls, rear stereo L/R RCA source inputs, RJ45 remote source ports 1–4, green Euroblock speaker outputs for four zones, control and trigger connections including RS-232 and 12V input, and IEC AC power inlet. Power specifications on rear label: AC115V 60Hz / AC230V 50Hz, 120W; fuse rating T2AL 250V; Made in Taiwan. Additional identification: serial number 4704-3232330 printed on rear label.
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