User manual ALPINE SPX-Z15M

[. . . ] Read this manual carefully before starting operation and use this system safely. We cannot be responsible for problems resulting from failure to observe the instructions in this manual. This manual uses various pictorial displays to show how to use this product safely and to avoid harm to yourself and others and damage to your property. Here is what these pictorial displays mean. [. . . ] If the TW-HP section is set to bypass in favor of an electronic crossover, the off-axis feature will no longer function, but basic level adjustment will still be possible. wF-LP: In addition to functioning as a selectable low-pass filter , this section also provides part of the phase correction and response compensation of the network. By shifting the phase appropriately within the crossover region, it is possible to achieve "phase linkage" with the tweeter, producing a seamless blend or transition between the two drivers. This relationship is affected by the distance and angle of both drivers relative to the listener, but also by their proximity to each other. Since in this case, most of the manipulation of the overlapping region is being done in the tweeter high-pass filter, less variation of the woofer low-pass is necessary. Subsequently there are basically two possibilities for the LPF: LP1 = low Q 1st-2nd order roll off (starting at 6dB/oct. SIGNAL LINK: The signal link jumpers provide a parallel connection between the input sides of the two terminal blocks, allowing a single input connection to be made without the use of extra terminals or wiring. Caution: These jumpers must be removed when used in a bi-amp configuration to prevent possible damage to amplifiers. System Description In this system type, the woofer and tweeter are mounted close together. While the kick panel is one of the more common locations to achieve this, it is certainly not the only one. What is most significant, is that by mounting the two drivers in close proximity with a minimized off-axis angle at the greatest distance possible from the listening position, it provides one of the best arrangements for optimum imaging in the vehicle. Since there are varying degrees of axis and pathlength that will be achievable for each driver in typical installations, four basic configurations are provided to accommodate the most common cases. Type-1A is the default setting of the network, and assumes essentially on-axis positioning with equal pathlength of both woofer and tweeter to the listening position. Type-1A (Option) is as above, but provides a more shallow roll-off and lower Q for the tweeter high-pass filter as an alternative. Type-1B is optimized for installations where build out for better on-axis positioning is possible, and the tweeter is mounted vertical over the woofer. Type-1C is for particular cases where flat to the surface mounting is required, and the tweeter is mounted over the woofer necessitating some delay for proper alignment of the two drivers. Network Jumper Setting Type-1A: Pathlength to the listening position is considered to be equal in this case, with relative on-axis positioning of both drivers. The woofer low-pass is a semi1st Order with a very gradual slope of 3-4dB/ oct. As a result, the acoustic crossover point between the two drivers is 2. Highlighted tweeter level jumpers are the recommended settings for each configuration, but some user adjustment may be desirable. Transfer function simulations only illustrate the effect of the filter upon the input signal, and therefore do not represent the actual frequency response of the system. If separate channels of amplification are used (bi-wire mode), the appropriate signal link jumpers must be removed. [. . . ] Both drivers are considered to be 45° off-axis at an average distance of approximately 1 meter. In this case, a medium Q 3rd Order high-pass filter is employed in conjunction with an inverted connection to the tweeter. Proper integration between the two is then achieved with a low Q quasi-2nd Order low-pass on the woofer, resulting in an acoustic crossover point of 2. Highlighted tweeter level jumpers are the recommended settings for each configuration, but some user adjustment may be desirable. [. . . ]