This iphone 4, 4S, 5 and 5S stand with speaker / horn was a nice design to see what you can do with 3d printing. To use the speaker / horn the sound of your iphone gets louder without using any power. This design is printed on Makerbot Replicator 2 with makerware.
Instructions
Holder:
Infill 10%
Shells 2
Layer 0.25mm
Horn:
Infill 0%
Shells 1
Layer 0.25mm
Horn big:
Infill 0%
Shells 1
Layer 0.1mm
Cover:
Infill 100%
Shells 1
Layer 0.25mm
Credits:
mikie10