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While this flexibility has obvious advantages, too many choices can also be confusing. Achieving the most phase coherent and flat summation possible requires controlling the amount of inherent phase shift of each filter, and is directly related to the selection of filter order, Q and cut-off frequency. Page 14 Jumper Group Function WF-LP: While functioning as a low-pass filter for the woofer, this section also provides a wide degree of adjustments for optimizing performance and system integration.
Since it is often difficult to position the woofer and midrange close together or at equal distances, it is critical to achieve phase linkage between them to avoid localization, image smear, poor staging, etc. Al- though such an installation may not often be practical in situations other than the demo- board, it is certainly possible given the custom fabrication techniques available today. Phase link- age is accomplished with a low Q 2 high-pass filter on the tweeter, 1 pass and 4 Order high-pass on the Page 17 Network Jumper Setting Type-1B: While the mounting configuration is the same as Type-1A, this network set- ting provides a variation for when personal taste, positioning or vehicle acoustics neces- sitates more high frequency output from the midrange and tweeter.
Rear deck installa- tion is one particular example where the extreme off-axis positioning will require such level compensation due to the natural roll However, due to the mounting arrangement and surface orientation, it also results in significant differences in distance and angle of all three drivers relative to the listener. Located at a moderate vertical distance down from the tweeter and basi- cally flush to the panel, the midrange is 8.
Utilizing the kick panel and door locations is the most common method, though it is certainly not the only one. Therefore, the acoustic center of the woofer is considered to be the closest driver by approximately Page 23 Network Jumper Setting Type-3B: Despite the fact that the midrange and tweeter are mounted in the same plane and in close proximity, their orientation re- sults in the acoustic center of the midrange being farther away.
Therefore, the midrange is considered to be 8. Although speakers may be mounted in a wide variety locations in this case, it is recommended that traditional techniques be used regarding both positioning and placement. La liaison de phase est accomplie par un filtre passe-haut 2 dre avec coefficient Q faible sur le tweeter, un filtre passe-bas de This manual is also suitable for:.
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