link to the speaker-https://alii.pub/6u32cp?erid=2SDnjdEWs5z

Реклама: ООО "АЛИБАБА.КОМ (РУ)" ИНН: 7703380158

An acoustic system that uses the energy of the back side of the speaker diffuser. As you know, the back or reverse side of the dynamic head reproduces the same sound wave as the front, but rotated 180 degrees. The task of the transmission line is to expand the reverse wave from the speaker by 180 degrees for the frequency of the audio signal that needs to be increased by adding sound waves from the front and rear sides of the speaker diffuser