iPhone speaker_Back loaded horn type

Updated versionI've adjusted the tolerance of the side panel holes for easier assembly and updated the phone depth options to 11mm and 12mm. Please select the version that best fits your phone. Additionally, I've added two types of phone spacers to help fine-tune the depth as needed.This speaker is designed using the iPhone 12 Pro with an Apple Silicone Case as the reference model, which has a total depth of 10mm. If you're using your phone without a case, you may need a 1.2mm or 2.2mm spacer for a proper fit. These spacers have been included in the updated design. Back-Loaded Horn Type Smartphone Speaker Experience powerful, high-quality sound anywhere with this Back-loaded Horn type smartphone speaker. Designed specifically for smartphones, this speaker delivers confident and rich sound without the need for electric power. Its back-loaded horn structure amplifies sound naturally, producing deep bass and crisp highs that fill the room with remarkable clarity. Assembly is e