A 5-wire head-end and trunk amplifier. Colour coded inputs/outputs. Switchable 18v DC to power LNB and V5 network. Switchable 12v DC to power terrestrial masthead pre-amplifier. Interstage level controls on all inputs. Slope control on terrestrial input. Earth bonding post. Switch-mode PSU. LED indicators for power status and short circuit/overload diagnostics.