User manual JBL XTI 40

[. . . ] these terminals permit a variety of connection methods. The most straightforward connection is made by directly connecting clean bare wire. This connection is made by stripping 8-10 mm of insulation off the loudspeaker wire and passing the bare wire through the hole in the binding post. The knob can now be tightened securely, and any excess wire that is not in contact with the binding post surfaces should be trimmed to avoid short circuits. [. . . ] IMPORTANT: When connecting or disconnecting loudspeakers from an amplifier, the amplifier must be turned off. Making connections while the amplifier is operating could seriously damage the loudspeaker system and void the warranty. The amplifier must also be turned off before connecting or disconnecting cables, at the amplifier or pre-amplifier inputs. JBL XTI-Series loudspeakers may be connected to the amplifier using two lengths of wire for each speaker. the "biwire" connection method offers several options and advantages. The system's internal dividing networks are electrically separated at the low frequency to midrange/tweeter transition. External strapping bars connect the two parts of the network when a single wire connection is used. The system is shipped from the factory with the strapping bars in place. By removing the bars, connections may be made to the individual network sections using two wires (four conductors) as shown in Figure 1. The wires used may be of the same type for both low frequency and high frequency sections. the advantages are that wire effect (resistance , inductance , etc. ) are reduced and intermodulation of low and high frequencies in the cable are avoided. CAUTION: Never connect two amplifiers to the same loudspeaker without first removing the strapping bars. Operating two amplifier channels with the bars in place may seriously damage the amplifiers and void the warranty. The JBL XTi-Series speakers are capable of handling peak power far exceeding the continuous rating specified for the individual speakers. The continuous ratings are based on an eight hour test using broadband noise shaped to simulate the power distribution of music. The peak rating of approximately 4 times the continuous rating indicates the system's ability to handle transient peaks well above the average power levels. Amplifier power ratings are an INDICATION of how loud the system will play without distortion. Amplifier power is generally measured with steady state test signals and perhaps, in addition, dynamic measurements into resistive loads. Unfortunately none of these are firm indications of how loud the system will sound in a given listening room. For these reasons, an amplifier should only be chosen after careful listening. If it is possible to achieve the desired volume level without distortion, then the amplifier has sufficient power regardless of the rating. [. . . ] if a problem exists in one loudspeaker , reverse the speaker wires to the left and right system. If the problem remains in the same system, then the fault is in the loudspeaker. if the problem appears in the opposite system , the cause is in another component or cable. Do not return products to the JBL factory without prior authorization. [. . . ]