PN21026 is a grille applied to the front of the speaker, as well as a speaker specific grille. It is an audio network that combines classic and fashionable elements. Fully consider acoustic design, and there will never be any attenuation of high or low tones. His craftsmanship is very complex and his appearance is also very beautiful. And it has a good enhancement effect on sound quality. Marshall and Fender both use this mesh fabric, which is thick, hard, and lacks elasticity.