User manual JBL TI6K BEECH

[. . . ] Consult your JBL Ti Series dealer for further information regarding the use of products or materials designed to control certain acoustic problems caused by room size, shape or construction. In many cases, significant improvement in performance can be achieved by careful attention to room acoustics. Your JBL Ti speakers are able to give a very satisfying sound in a great variety of listening rooms when set up in an even sided triangle with respect to the listener. However, a careful setup procedure will always be rewarding, and for best results we recommend placement well away from the boundaries of the room with preferably minimum 0. [. . . ] Frequency of maintenance depends on the materials involved in the connection, atmospheric conditions and other factors. It is essential that both loudspeakers in a stereo system have the same polarity with respect to the input signal (are in "phase"). JBL Ti speakers are designed to produce a positive pulse when a positive signal is applied to the red input terminal. If the driver cones of the two loudspeakers do not move in the same direction for a given voltage at the input terminals, there will be a lack of stereo definition and a loss of deep bass. We recommend experimenting with the polarity of the speakers, since recordings, program sources or power amplifiers can invert the polarity of the signal. the "correct" connection is the one that yields the best audible results. Be sure to reverse both left and right connections to keep the systems in polarity. 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. These recommendation are given as MINIMUM requirements, and generally speaking, the speaker leads should be as short as possible. speaker wire and interconnect cables are important components in an audio system. With all other factors at an appropriate level of quality the speaker cable and the interconnect cable can make significant contributions to the perceived sound quality. Careful selection of cable and interconnect can add or subtract marked shadings in tonal character. Likewise, different cables can have quite a dramatic impact on the dynamic contrasts experienced by listeners. The same care that was given to the internal system wiring in the JBL TI speakers should be afforded to the selection and application of the cable that will connect the various components in your system. Your JBL Ti Series dealer has the experience and knowledge to recommend suitable interconnects and speaker wire to best complement your system. the length of the speaker wire will depend on the location of the loudspeakers and the amplifier. Since the final positioning of the loudspeaker will be determined by careful listening, you may want to arrange a temporary wiring layout that will allow the moving of the loudspeaker to experiment with placement. When the best loudspeaker position is determined, permanent connections may be made using the shortest cable runs possible. In some systems, the amplifier may be located near the loudspeaker system and may be connected using a short length of speaker wire. Although a relatively long cable between the preamplifier and main amplifier is required by such a hook-up, the benefit of a short amplifier-to-loudspeaker connection will often outweigh the drawbacks. [. . . ] If the problem remains in the same speaker, then the fault is in the loudspeaker. If the problem moves to the other speaker, the cause is in another component or cable. The voice coil assembly is located with extreme precision and the clearance is very small. Any attempt to move the assembly by hand can easily force the voice coil out of alignment and cause distortion or failure. [. . . ]