JBL GHE 1200V Owners Manual English - Page 3

GHE SERIES CONNECTIONS To connect the loudspeaker systems to the receiver or amplifier, use twoconductor insulated wire. Your JBL dealer can recommend suitable cables, or you can buy wire at most hardware or electronic stores. We recommend #16 AWG wire as a minimum size. If planning to use the bi-wiring feature, please read that section of the manual for type of speaker interconnect wire to use. If your speakers are more than 30 feet (10 m) from your receiver or amplifier, use larger diameter wire. Connections are made at the terminals located on the back of the loudspeaker system. The terminals accept bare wire or dual banana plugs, either of which will provide easy, secure connections. Preparing the Hookup Wire Carefully plan your wire lengths before cutting any speaker wire. Be sure to allow plenty of extra wire to help hide paths in corners, along baseboards, etc. 1. First determine the wire length needed between the most distant speaker and the receiver or amplifier. 2. Now make the hookup wires for both speakers this length, even if one loudspeaker is much closer to your amplifier than the other. This will help maintain proper signal balance. 3. Strip off 3/8" of insulation from both ends of each conductor. 4. Twist each set of thin wires into a tightly-bunched spiral. 5. At this point you need to identify a visual difference between the two conductors of each molded pair of speaker wire. Differentiating marks can be a different color wire (copper or "silver"); a strand of yarn in one conductor; thin, raised ribs on one part of the outer insulation; or a printed "+" marking on one of the insulators. It does not make any difference which of the two strands of wire go to (+) and (-) on the speakers and amplifier, as long as both speakers are connected identically. If using wire ends, unscrew the colored nut on the terminal cup, insert the wire end into the hole in the metal post, then retighten the nut until the wire is tightly secured. If using banana plugs, simply insert the plug directly into the holes on the top of the metal posts. For each channel, the red terminal on the loudspeaker should be connected to the red or (+) loudspeaker connection terminal on the receiver or amplifier, and the black to the black or (-) speaker conection terminal (see Fig. 3). Connecting the loudspeakers in this manner ensures that they will be in phase; that is, work together rather than in opposition. Connecting the loudspeakers out of phase will not damage them, but will result in less bass and poor imaging. Left Speaker Red Blk. (+) (-) Right Speaker Red Blk. (+) (-) +L + R Amplifier/Receiver Fig. 3 Hooking Up Multiple Sets of Speakers If your receiver has two complete sets of speaker terminals ("A" and "B"), it's possible to hook up an additional pair of speakers for simultaneous sound in another room. However, some speakers may not be usable as a second pair if you want to play two sets at once. Before hooking up another set of speakers besides your GHE Series, check the following: 1. Your receiver or amplifier minimum load impedance. Impedance is always expressed in ohms and can be found in the owner's manual that came with your unit. For example, the following are typical entries in receiver/amplifier owner's manuals: A)100 watts RMS into 8 ohms, both channels driven, 20-20kHz with less than 0.02% THD. 3