The back panel speaker connections con- sist of two groups of binding posts which accept bare wire or banana type plug con- nectors (except in the European Community countries where their use is not permitted). One group is used for the A speakers; the other for the B speakers. Each group has a positive (+) and negative (–) connection for the right speaker and a positive (+) and negative (–) connection for the left speaker
Each pair of connectors is color-coded for polarity: red for the positive connection and black for the negative connection. All speak- ers and all speaker wire is also marked for polarity. It is essential for proper performance to maintain this polarity at all speaker con- nections. Always connect the positive terminal of each speaker to the corresponding red speaker terminal on the RX-975 and the negative speaker terminal to the correspond- ing black connector on the RX-975.
Route the wires from the RX-975 to the speak- ers. Give yourself enough slack so you can move the components to allow access to the speaker connectors. If you are using banana plugs, connect them to the wires and then plug into the backs of the binding posts. The collars of the binding posts should be screwed in all the way (clockwise). If you are attaching bare wires directly to the binding posts, separate the wire conductors and strip back the insulation from the end of each conduc- tor. Be careful not to cut into the wire strands. Unscrew the binding post collars. Insert the wire into the hole in the shaft. Turn the col- lars clockwise to clamp the wire in place.
NOTE: Be sure there are no loose wire strands that could touch adjacent wires or connectors.
Preamp Inputs/Outputs 
The RX-975 provides a pair of variable-level RCA preamp audio outputs and a pair of RCA amplifier inputs that allow you to use external amplifiers in place of, or in addi- tion to, the built-in amplifiers.
NOTE: The preamp outputs are connected to power amplifier inputs with metal jump- ers in a standard PRE OUT/MAIN IN con- figuration. To disable the built-in power amplifiers and use external amplifiers, it will be necessary to remove these jumpers. Save them for future use.
To hook up the RCA audio outputs
to an external amplifier, connect a standard audio cable from each output to the input of the amplifier channel that will power the corresponding speaker.
Antenna Connections
The RX-975 requires two antennas to receive radio signals, one for AM and one for FM. Most users will get acceptable reception using the indoor antennas which are supplied with the RX-975. Instructions for hooking up these antennas follow.
NOTE: If you are located a long distance from the radio transmitters, you may use an outdoor antenna to improve reception. Outdoor antenna systems can be danger- ous if they are not properly grounded and should be installed by a professional con- tractor familiar with the electrical code re- quirements in your local area.
AM Loop Antenna 
The RX-975 includes a loop antenna to re- ceive AM radio signals. Remove this antenna from the box and locate it near the RX-975.
Connect the 300 ohm twin-conductor wire from the loop antenna to the pair of screw terminals labeled AM LOOP, attaching one wire to each terminal. It does not matter which wire attaches to which terminal, but make sure that the connections are solid and that the two wires do not touch.
You may need to rotate or otherwise reori- ent the antenna to find the best position.
NOTE: To use an outdoor antenna, connect its 300 ohm twin-conductor wire to the AM terminals in place of the loop antenna, only after a professional contractor has installed the antenna system in accordance with lo- cal electrical codes.
FM Wire Antenna 
The RX-975 includes a wire antenna to re- ceive FM signals. In many countries (including the USA), this antenna is a T-shaped twin- conductor 300 ohm antenna. Remove this antenna from the box and connect its two conductors to the two screw terminals on the supplied 300 ohm to 75 ohm adaptor. Con- nect the coax plug on the converter to the FM 75 ohm antenna connector on the RX-975.
For best reception, unfold the T-shaped wire antenna. There are eyelets at both ends of the T, which allow tacking the antenna to a wall, if desired. Experiment with position- ing for best reception.
In some countries, the RX-975 may be sup- plied with a single wire FM antenna termi- nated by a 75 ohm coax connector. If your unit is supplied with this antenna, connect it directly to the FM 75 ohm antenna con- nector.
NOTE: To use an outdoor antenna, connect its 75 ohm coax lead wire (or 300 ohm twin-conductor wire and 300 ohm to 75 ohm adaptor) to the FM 75 ohm connector in place of the indoor wire antenna, only after a professional contractor has installed the antenna system in accordance with lo- cal electrical codes.
