For more than 50 years, JBL has been involved in every aspect of musical and film recording and reproduction, from live performances to monitoring the recordings you play in your home, car or office. We're confident that the JBL loudspeakers you have chosen will provide every note of enjoyment that you expected ­ and that when you think about purchasing additional audio equipment for your home, car or office, you will once again choose JBL. Please take a moment to complete the enclosed profile card. It enables us to keep you posted on our latest advancements, and helps us to better understand our customers and to build products that meet their needs and expectations. JBL Consumer Products one. Speaker Placement JBL500, JBL800 JBL900 JBL Center 0-2 ft. Speaker Connections Connection Tips Speakers and electronics terminals have corresponding (+) and (­) terminals. It is important to connect both speakers identically: (+) on the speaker to (+) on the amplifier and (­) on the speaker to (­) on the amplifier. Wiring "out of phase" results in thin sound, weak bass and a poor stereo image. RIGHT LEFT ­ + ­ + ­+ ­+ Speaker Outputs Troubleshooting If there is no sound from any of the speakers, check the following: · Receiver/amplifier is on and a source is playing. · Review proper operation of your receiver/amplifier. If there is no sound coming from one speaker, check the following: · Check the "Balance" control on your receiver/amplifier. · Check all wires and connections between receiver/ amplifier and speakers. · Make sure all wires are connected. Make sure none of the speaker wires are frayed, cut or punctured. If the system plays at low volumes but shuts off as volume is increased, check the following: · Check all wires and connections between receiver/ amplifier and speakers. · Make sure all wires are connected...