User manual JBL PROPERFORMER

[. . . ] This will generate high distortion levels and may cause damage to your loudspeaker. For the best performance, an amplifier should be selected with an output rating that is greater than the maximum power that will be used. This margin of reserve power will ensure that the amplifier will not attempt to deliver more power than its design allows. [. . . ] Please see the specifications section for details. Following these two guidelines will provide virtually distortion-free sound reproduction and long loudspeaker life. 3. Strip off 3/8" of insulation from both ends of each conductor. Twist each set of thin wires into a tightly-bunched spiral. 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 a difference which of the two conductors of wire go to (+) and (­) on the speakers and amplifier, as long as both speakers are connected identically. Push down on the button below the terminal and insert the wire, or the banana plug, through the hole (see Fig. (+) (­) CONNECTIONS To connect your JBL loudspeaker systems to a receiver or an amplifier, use two-conductor insulated wire. Recheck the impedance requirements of the amp. Bass is very weak AND/OR sound seems to come from each speaker separately, without creating a stable stereo image between the speakers. 1. The polarity (+&­) of one speaker has been reversed relative to the other. Speakers are too far away from back and side walls or too far apart. Experiment again with the speaker placement. If you are still experiencing problems, consult your JBL dealer. GENERAL CARE The grille is held in place by pins near the edges (except PROPERFORMER, which has a non-removable grille). To remove the grille, grasp it by both top and bottom edges and pull gently. To replace grille, reposition it carefully and press gently at the corners. Do not push on the center area of the grille. [. . . ] The loudspeaker cabinet may be cleaned with a slightly damp cloth. To remove dust from the grille cloth, use a vacuum with a brush attachment. Spots may be removed with a commercial spot remover. [. . . ]