Most speakers that are specifically designed for the center channel are magnetically shielded in advance, but if you use full range floor standing speakers or unshielded speakers for the center, you will inevitably encounter the unpleasant phenomenon of "color spots" on your TV screen. This effect is possible when the distance between the front speakers and the TV is too small.
Instructions
Step 1
Use any magnetically conductive material for shielding, such as steel., In the form of a cylinder or glass. This can be either a pipe cut with a suitable diameter and wall thickness (by the way, it should be within 1-3 mm), or a steel flask or glass, which can be found at the factory, where there is an appropriate material or means for its manufacture. The inner diameter of the glass should be 5-20 mm larger than the diameter of the dynamic magnet.
Step 2
You can also use regular thick foil. Just keep in mind that the foil should not be aluminum, it is easy to check with an ordinary magnet. So if it is not possible to get a piece of pipe or a steel "glass", mold a structure of the desired shape from strong foil, folding the foil several times for strength and stability.
Step 3
Apply a layer of polyurethane foam to the inner walls of the magnetically conductive structure. The thickness of this layer should be selected in such a way that the entire structure can fit tightly on the magnetic system of the speaker of the speaker.
Step 4
Thoroughly coat the speaker magnet system with glue. It is recommended to use the "Moment" glue, which has been proven in battle, to avoid peeling over time or fragile adhesion, which can lead to a rattling sound.
Step 5
Slide the prepared magnetically conductive structure onto the greased speaker magnet system. It should be noted that the end part of the structure should either be very tightly glued to the speaker, or be 2-3 mm away from it in order to avoid possible bounce when reproducing sound. Thus, the overall mass of the speaker system will be increased thanks to the steel shield, thereby significantly improving the sound at low frequencies, but reducing the internal volume of the speaker.
