[. . . ] OWNER'S GUIDE PRODUCT LINE: NORTHRIDGE SERIES MODEL NUMBERS: N28, N38, ND310 PRO SOUND COMES HOMETM SPEAKER PLACEMENT Proper placement of the speakers is an important step in obtaining the most realistic soundstage possible. [. . . ] · Check all wires and connections between receiver/amplifier and speakers. If the system plays at low volumes but shuts off as volume is increased: · Check all wires and connections between receiver/amplifier and speakers. · If more than one pair of main speakers is being used, check the minimum impedance requirements of your receiver/amplifier. If there is no (or low) bass output: · Make sure the polarities (+ and ­) of the left and right "Speaker Inputs" are connected properly. If there is no sound from the center speaker: · Make sure that your receiver's "Center-Channel" mode is in the "Normal" or "Wide" position. If it is in the "Phantom" position, the center speaker will not play. [. . . ] Occasional refinements may be made to existing products without notice but will always meet or exceed original specifications unless otherwise stated. PRO SOUND COMES HOMETM JBL Consumer Products 250 Crossways Park Drive, Woodbury, NY 11797 8500 Balboa Boulevard, Northridge, CA 91329 800-336-4JBL (4525) (USA only) www. jbl. com ©1999 JBL, Incorporated. [. . . ]