И сразу нешутошный вопрос к производителю:
А как там электроны поживают на высоких скоростях высоких частот? На крутых поворотах?
Так оно и есть на самом деле. Делал пищалку электродинамическую из изодинамической для Sony SS-757.
Посмотреть вложение 30278 Посмотреть вложение 30280 Посмотреть вложение 30279
Так вот почему квадратные катушки то не делают! Чтобы не было обмана покупателя,- электроны на углах будут улетать к производителю,- этого не может допустить честный изготовитель динамиков!
ПС. катушка точ такая же, только у Игоря она более аккуратная))
Что-то там рекламное было про размытие неравномерностей. Вроде того, как объясняют лучшее звучание овальных диффузоров.
Этож не паханое поле маркетинга,- столько форм катушек можно пропиарить! И пчелиный сот и звездами - пять лучей (Назад в СССР!), шесть лучей - маде_ин_Израиль! Если постараться, то Мебиусом восьмеркой, с разнополярными магнитиками замудрить можно!
Тут походу ктото косякнул конкретно:
Круглую катушку поставили -дебилы, *ля! (с)
Да и обмоток надо было три...
Вот это наверное я "изобретаю"
Только размерчики катушек поболее для басовика должны быть, но принцип тот же.
Multi-cell Flat Diaphragm Speakers
This speaker is related to the electrodynamic loudspeaker in that it uses magnetic fields to move an element, however its shape is different. This speaker has the coil directly mounted on the diaphragm. Below is an example of a
flat panel style diaphragm speaker. The copper coils have been wrapped around the base of the clear plastic bulges in the photos below. The long permanent magnets create separate 'cells' and the whole diaphragm ends up moving uniformly. This is a heavier speaker than the flat panel speakers above. This type of speaker requires a tranformer because each small cell has a lower impedance than a standard speaker with single exciter.
Orthophase
I also learned of the Orthophase flat panel speaker cell made in France. They could be stacked in a column of many cells. In July, 1961, I inquired to Mr. Georges Gogny in Paris, France about the specifications and cost for these drivers. These speaker cells were 4” X 8” and could be arranged in a column that would cover the frequency range from 1000 to 25,000 Hz. However, with the addition of more cells, the lower frequencies could be extended. Each cell had a diaphragm made of a thin, rigid, flat section of expanded, very light weight plastic foam. The magnet structure, in the left picture, was made up of ceramic magnets along raised steel strips so the conductive tape, in the right picture, lay in the strong magnetic field. The diaphragm was able to move uniformly back and forth. The impedance of each cell was 0.35 ohms. At that time, the cost for each cell was 212 N.F. or $42.50 each a plus the cost of importing. Unfortunately, a set of 16 cells was beyond my budget.
The Orthophase family of systems was reviewed in the December 1964 issue of High Fidelity magazine. The smallest system had a single cell and a dynamic woofer. Other systems had more cells. The systems did not have the cells arranged in a column but were side by side. The OR-12 had 12 cells and no woofer. The cells were arranged in a rectangle and the cabinet height was only 27 inches. That sold for $785. Because the cell impedance was so low, a matching transformer was necessary to present an 8-ohm impedance for the amplifier. The exception was the OR-12 that had no transformer. The cabinets were open back, similar to an electrostatic speaker system. The systems were only moderately efficient.
