[. . . ] [. . . ] Connect the Coax Cable between the R649 and the F Connector on a McIntosh A/ V Control Center, Preamplifier, Multizone Controller or Integrated Amplifier. When the R649 is used with a McIntosh A/V Control Center that uses a Five Pin Terminal Connector, connect the Center Wire to Pin 4 and the Shield to Pin 5. Note: Before connecting the R649 to a McIntosh A/V Control Center, Preamplifier, Multizone Controller or Integrated Amplifier, make sure that the Main AC POWER Switch is in the Off Position (or remove the units AC Plug from the AC Wall Outlet). McIntosh Part No. [. . . ] [. . . ]