This is a design I made to "amplify" the sound coming from your phone's bottom speaker. In reality this design focuses the sound coming from the phone by placing the speaker port right at the focal point of a very specific parabolic curve. Think of it like a flashlight. But with sound. You will be impressed with how much this concentrates the sound in one direction!
The design also incorporates a channel to allow you to charge your phone while in use. How convenient!
Right now I've modeled these for some various sizes of iPhones and cases. But you can message me and I will modify my models for your own phone/case combination.
Print as if a bathtub with support material. It will have to be cut out later.