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If this happens, turn the amplifier off, let it cool down for several minutes, and attempt to iden- tify and correct the problem. When you turn the amplifier back on, the protection circuit will automatically reset and the LED indica- tor should go out.
In most cases, the protection circuitry activates because of a fault condition such as shorted speaker wires, or inadequate ventilation lead- ing to an overheating condition. In very rare cases, highly reactive or extremely low im- pedance speaker loads could cause the pro- tection circuit to engage.
If the protection circuitry triggers repeatedly and you are unable to isolate and correct the faulty condition, contact your Rotel audio retailer for assistance in troubleshooting.
Input Signal Connection
[See Figure 2 for wiring illustration.]
The
Note: Do not connect inputs to both the RCA and DB25 inputs. (See the following section.) Use one or the other.
Note: To prevent loud noises that neither you nor your speakers will appreciate, make sure the amplifier is turned off when you make any signal connections.
Use high quality audio interconnect cables. Connect the various outputs of your pream- plifier or signal processor to the correspond- ing inputs of the
DB25 Connector Input
The
Speaker Connection
Speaker Selection
We recommend using loudspeakers with a nominal impedance of 4 ohms or higher with the
Speaker Wire Selection
Use insulated
Polarity and Phasing
The polarity — the positive/negative orien- tation of the connections — for every speaker and amplifier connection must be consistent so all the speakers will be in phase. If the po- larity of one connection is mistakenly reversed, bass output will be very weak and stereo im- aging degraded. All wire is marked so you can identify the two conductors. There may be ribs or a stripe on the insulation of one conductor. The wire may have clear insula- tion with different color conductors (copper and silver). There may be polarity indications printed on the insulation. Identify the positive and negative conductors and be consistent with every speaker and amplifier connection.
Speaker Connection
The
The negative connectors for all the channels are black. The positive connectors for the right front and surround speakers are red. The posi- tive connectors for the left front and surround speakers are blue. The positive connector for the center speaker is green.
Route the wire from the
If you are using dual banana plugs, connect them to the wires and then plug into the backs of the binding posts. The hexagonal thumb- screws of the binding posts should be screwed in all the way (clockwise).
If you are using terminal lugs, connect them to the wires. 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 conductor. Be careful not to cut into the wire strands. Unscrew (turn coun- terclockwise) the binding post hexagonal thumbscrews. Place the connector lug or wire around the binding post shaft. Turn the hex- agonal thumbscrews clockwise to clamp the connector lug or wire firmly in place.
Note: Be sure there are no loose wire strands that could touch adjacent wires or connectors.