Acoustibox Grille Boxes Acoustiboxes are made by Hammer Metalworks. In 2002, Acoustiboxes were designed as an original construction concept. The main features are better construction, covered insulation edges, square sitting, no pins and better insulation compression. Get In touch Now! Custom-Made to Meet Your Needs Based on your requirements, we can build a custom solution for you. Ex-stock boxes are available in standard sizes.We are sheet metal fabricators who manufacture top entry and side entry grille boxes with round or oval spigots. Contact us