Сообщение от
Apos
Немного подумавши решил,
правильно
Offтопик:
слушай если с аглицким проблеммы то скажи (я пока до Канатчины не доехал имел с аглицким большой проблеММ), всё я не переведу точно, но пару вырезок доносящих суть могу тиснуть без проблем
Offтопик:
I mounted four 269-469, 2x2, on a baffle and liked the sound a lot, except this configuration in Voight pipes produced poor image. Lobbing - interference between drivers - is the reason. This is where line arrays help. Instead of mounting 4 speakers 2X2, I mounted them in a vertical array. The sound was fuller, imaging was still very sharp. I added 2 more drivers nd confirmed what I have already heard with 4-element array: high-frequency roll-off. Interference, again, was causing this. The drivers in the middle appear close to the listener than the top most and the bottom most drivers by more than an inch, which is enough to cancel out high-frequency waves.
That is why experiencing the advantages of true tall line arrays for many is so troublesome. If anyone could build arrays as tall as listening distance, that would additionally raise the efficiency of the speakers, because tall arrays are known to radiate in cylindrical space, with sound decaying 3dB/d, which is better than 6dB/d a conventional point-source provides. There are commercial tall arrays but those do need driver selection to compensate for the loss, or use delay lines which are complex. There is another, much simpler and holistic solution - baffle curving. JBL professional sound papers describe curved line arrays. These are increasingly popular and can be seen at concerts. However, these curved arrays are to increase dispersion in a large hall.
I refer to another way of curving tall line arrays - concave curving. In this arrangement all drivers in a line are equidistant from listener ears. Two line arrays would be on a surface of a sphere, see a pic in [3]. When you sit in the listening spot, each driver is positioned straight at your face.
Сообщение от
gross
ссылку на подобный рупор
рупор #1 (100° H x 50° V)и рупор #2 (120° H x 30° V) или около того
Добавлено через 31 минуту
Сообщение от
Vlad Bo
А «пуля» не расширяет диаграмму направлености на ВЧ?
не должна, насколько я понимаю задача пули сделать поле излучения более равномерным путем экранирования участков диффузора излучающих в противофазе (зонное излучение) если при этом и расширяется диаграмма?? то эффект должен быть незначительным. Должны бы чуть улучшится внеосевые. Надо спрашивать у MaxMan он вроде ковырялся с пулями не мало
Добавлено через 51 минуту
Сообщение от
gross
Фактически это должны быть топовые головки, типа 4,5", скоректированные
Ну с этим трудно спорить , но
Vifa PL11WG ~$50
Vifa MG10SD ~45
Seas H1152 ~ $50
Fostex FF107 FF127 ~$32-$40 и минимум 24 штуки, на данный момент, для меня просто не реально
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