User manual JBL P-52C

[. . . ] Having access to the receipt is also valuable for insurance purposes and when it comes time to resell your vehicle. Tweeter Installation The tweeter has been supplied with both surface- and flush-mount brackets. Figures 1 and 2 show the proper way to flush- and surface-mount the tweeter. The mounting hole diameter of the flushmount frame is 1-7/16". Figure 1 Autosound at Its Best Your JBL Component System is built to meet the same rigorous standards of construction and performance that have long established JBL's renowned home and professional speaker systems. [. . . ] This is most easily achieved by placing the speakers as far forward as possible. This means that high frequencies are reduced as you move off the tweeter's axis. The angle mounts will allow the tweeters to be pointed across the car to the listener on the opposite side. This will make each listener slightly off-axis to the tweeter that is closest to that listener, which helps to compensate for the fact that the listener is always closer to one tweeter than to the other (see Figure 6). The best system integration is achieved when the tweeter is mounted close to the midwoofer speaker. This helps smooth the transition from the midrange and tweeter at the crossover point. Choosing mounting locations that satisfy all of the above criteria will provide the most satisfying performance. Left Figure 6 Right System Design There are a variety of system options available with the Component System. The simplest configuration is to use them full range with their built-in passive crossovers by connecting them to the output of a head unit or an amplifier (Figures 7 and 8). A more advanced system design can be achieved by adding a Decade, TM GT, Power, GTi, or equivalent subwoofer to your component system. In this case the component system will be used as high and midbass frequency drivers and should have their extremely low frequencies blocked by electrical means. Active or passive crossovers can be used in order to achieve the best system fidelity and widest dynamic range. Crossover frequency recommendations are given in the Specifications. Power Tweeters Amplifier output set at full range or high passed at f > 80Hz Power Midwoofers Left Channel Right Channel Power component system connected to speaker outputs of a high powered head unit Left Right Figure 7 Power Tweeters Power Midwoofers Left Channel Power component system connected to amplifier Figure 8 05 A Note on Power Handling As a result of their high efficiency, all JBL loudspeakers will produce reasonable volume levels in the automotive environment using very little amplifier power. However, the use of a small amplifier to attain very high volume levels could lead to over-driving the amplifier. This will generate high distortion levels which can easily damage loudspeakers, even if the rated power of the amplifier is below the rated maximum power handling of the loudspeaker!As a general rule, do not turn up the volume control past the point where you hear distortion in the form of either signal distortion from an overdriven amplifier or mechanical noise from an overstressed speaker. For the best performance and system reliability, you should select an amplifier with an output rating greater than the maximum power likely to be used to generate the desired volume levels. If you want your system "Loud + Clear, " we suggest that you step up to a JBL power amplifier which has an RMS power rating equal to, but not exceeding the Maximum Recommended Amplifier Power listed in the specifications of your specific JBL speaker. This margin of reserve power will ensure that the amplifier will not attempt to deliver more power than its design allows. [. . . ] CAUTION: Fuel tanks are located directly beneath the rear deck in some cars. Check for adequate speaker basket clearance before considering this location! WARNING: Playing loud music over 120dB can permanently damage your hearing. The maximum volume levels achievable with JBL components and high power amplification may exceed safe levels for extended listening. [. . . ]