User manual JBL G50

[. . . ] For the best stereo imaging, we recommend that the systems be placed so that the high frequency transducers are positioned approximately at ear level of a seated listener. That's why smaller loudspeakers will benefit from placement on stands or bookshelves. So don't hesitate to experiment on your own. 40 100 200 300 400 500 40°-60° Fig. [. . . ] 1 Thanks to their high efficiency, JBL loudspeakers will produce reasonable volume levels in a room of moderate size with very little amplifier power. However, using a small amplifier to obtain the desired volume listening levels may lead to overdriving the unit. 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. However, the power amplifier's power rating per channel must not exceed the maximum recommended amplifier power for that specific loudspeaker model. Following these two guidelines will provide virtually distortion-free sound reproduction and long loudspeaker life. 3. At this point you need to identify a visual difference between the two conductors of each molded pair of speaker wire. Sound source (CD, cassette deck, turntable) not turned on, not activated, not hooked up or not selected on amp/receiver front panel. Both speakers play at low volume but shut off as volume is increased OR sound turns on and off intermittently A few strands of speaker wire may be shorting out. 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. If you are still experiencing problems, consult your JBL dealer. GENERAL CARE The grille is held in place by pins near the edges (except G40, 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. To remove dust from the grille cloth, use a vacuum with a brush attachment. [. . . ] To remove dust from the grille cloth, use a vacuum with a brush attachment. Do not use any cleaners or solvents on the speaker drivers themselves. SERVICE Should your loudspeaker ever need service, return it to the JBL dealer from whom it was purchased. If for some reason this is impractical, call 800-336-4JBL for your nearest warranty station. [. . . ]