1.planeness
The connection of drum paper, bounce and frame must be flat and tight to ensure safety. When the drum paper has a concave surface, consider whether the drum paper contacts the frame surface when working.
2. Height setting
Design or select the appropriate iron frame based on the effective height of elastic wave and drum paper. There should be a small hole between the drum paper and the elastic wave at the three-point connection, generally 0.3-0.8mm, and the drum paper is too tight. After that, the neck glue was separated, and the sound connection was poor. It will cause serious problems such as drum paper pressure, uneven carcass height, sinking of elastic wave, and increased probability of bad sound. In addition, the height of the elastic wave surface to the bottom and internal space. For horn speakers with large power and amplitude, if the height is not enough, the elastic wave neck will contact the iron sheet or riveted embossed points during vibration, resulting in similar AB defects. Disadvantages.
3. Thermal design
When the horn is working, the silver cone will generate high heat, and the hot air is mainly concentrated in the cavity below the bounce. If the internal space between the bottom of the iron frame and the elastic wave is not enough, the heat accumulation will not spread, which will increase the aging speed of the strip speaker and lead to power failure. Therefore, design needs to be considered. The space at the bottom of the iron frame can be appropriately expanded or holes can be designed at the bottom of the iron frame. If it is a plastic frame, the excessive temperature generated by the iron sheet will lead to plastic softening deformation and "defects". Heat insulation materials are added between the sheet and the plastic frame.