Amp for iPhone 5/5s/5c w/ Lifeproof case

I created this model with 123D Design to fit my iPhone 5 that has a lifeproof case. The sound is pretty good. I printed this with 100 micron layer resolution, 30% infill, with 3 walls, .35 nozzle, PLA, non heated bed, in 3 hours and 45 minutes.