Bedienungsanleitung JBL J900MII




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  • Speaker System JBL J900MII

  • Vorschau JBL J900MII Handbuch:
    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 all speakers used in your system are connected identically. Push down on the button below the terminal and insert the wire through the hole. For each channel, the red terminal on all loudspeakers should be connected to the red or (+) speaker connection terminal on the receiver or amplifier, and the black to black or (–) speaker connection 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. This is very important when connecting sev- eral speakers together in a Dolby Pro-Logic AV application. Connecting the loudspeakers out of phase will not damage them, but will result in less bass and poor imaging. When connecting the J Center or other J Series speakers to a Dolby Pro-Logic AV receiver, refer to the instructions accompanying your AV component for use of the “test tone” to properly balance the sound output from each speaker. The use of the “test tone” and the controls on your AV receiver will enable you to cor- rectly balance the level (volume) of sound coming from each speaker in your Dolby Pro-Logic application. 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 addi- tional pair of speakers for simultane- ous 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 J Series loudspeakers, check the following: 1. Your amplifier’s minimum load impedance. 2. The nominal impedance of the second set of speakers. Both of these specifications are expressed in ohms and both can be found in the owner’s manuals which came with your speakers and amp/receiver. The receiver’s minimum load impedance is determined by whether or not power ratings are given for 4 ohms. This is because two sets of 8 ohm speakers will present a 4 ohm load to the receiver. The J speaker, when combined with an 8 ohm speaker, produces an impedance sufficiently close to 4 ohms. For example, the following entry in an amplifier owner’s manual... POWER: A)100 watts RMS into 8 ohms, both chan- nels driven, 20-20kHz with less than 0.02%THD B) 160 watts RMS into 4 ohms, both channels driven, 20-20kHz with less than 0.02% THD. 4 Left Speaker Amplifier/Receiver Right Speaker Red Blk. (+) + + (–) Red R L Blk. (+ .....
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