User manual NAD 218

[. . . ] Connect the wires from your left-channel speaker to the (L+) and (L-) terminals in the SPEAKERS group, and connect the wires from the right-channel speaker to the (R+) and (R-) terminals. in each channel the red terminal is the positive (+) output , and the black terminal is the negative (-) or "ground" terminal. Use heavy-duty (16-gauge or thicker) stranded wire, especially with 4-ohm loudspeakers. For a longer-lasting and more corrosion-resistant connection you may purchase speaker cables with nickel or gold-plated connectors (pin connectors, spade lugsfor 230V versions, or banana plugs for 120V versions), or you can install such connectors on the wires yourself. [. . . ] If the speakers cannot easily be set face-to-face, then phasing must rely on the "polarity" of the connecting wires. The speaker terminals on the amplifier are identified as red (+) and black (-) in each channel. The terminals at the rear of the speakers are also marked for polarity, either via red and black connectors or by labels: "+", 1, or 8 ohms for positive, "-", 0, or G for negative. The red (+) terminal on the amplifier should be connected to the red (positive) terminal of the speaker, in each channel. To facilitate this, the two conductors comprising the speaker wire in each channel are different, either in the color of the wire itself (copper vs. silver) or in the presence of a small ridge or rib pattern on the insulation of one conductor. Use this pattern to establish consistent wiring to both speakers of a stereo pair. thus if you connect the copper colored wire (or ribbed insulation) to the (+) amplifier terminal in the Left channel , do the same in the Right channel. At the other end of the wire, if you connect the copper colored wire (or the ribbed insulation) to the red or positive terminal on the left-channel speaker, do the same at the right-channel speaker. If your preamplifier has balanced XLR outputs, connect a three-conductor cable from your left-channel preamp output to the left-channel XLR input on the 218 THX, and set the BALANCE switch to BAL. If your audio dealer does not have the appropriate cables, purchase balanced "microphone" cables from a shop that sells professional recording equipment. The end of the cable that has a "male" XLR plug (with three metal pins) should be connected to the 218 THX amplifier. The end of the cable that has a "female" XLR socket (with three holes) should be connected to your preamp. An XLR plug is "keyed" so that it fits into the socket only one way. If there is a set-screw in the barrel of the plug, align it with the top of the connector. The three pins of an XLR-type ("Cannon") connector are numbered. Pin 1 is the chassis earth (ground), to which the shield of a balanced-wire cable is connected. The XLR socket has a latching feature that prevents the connector from being pulled out by accident. Use one hand to press the latching tab above the XLR socket while using the other hand to pull the XLR plug out. Make connections to the right-channel input in the same way that you did for the left channel. Set to UNBAL if you have connected a cable from your preamp to the RCA phono input jacks. Set the switch to BAL if you are making connections to the balanced XLR inputs. [. . . ] Use una mano para apretar la orejeta de empestillado encima del enchufe hembra XLR mientras use la otra mano para sacar el enchufe macho XLR. Anslut kablarna från vänster högtalaren till (L+) och (L-) terminalerna på A, och anslut kablarna från höger högtalare till (R+) och (R-) terminalerna. Det är möjligt att ansluta en icke balanserad källa till XLR-ingångarna genom en special kabel där båda signaljord och chassiejord ansluts till RCA-kabelns skärm i "sändar"ändan. Omkopplaren bryggkopplar förstärkarens två kanaler till en, vilket gör om NAD 218 THX till en monoförstärkare med mer än dubbelt så mycket uteffekt. [. . . ]