Hey Guys! Here is the long awaited HTC One M7 GramoAmp. It works basically like any iPhone Horn. You place your phone in the holder, and you're good to go. Idon't know about you, but I've been waiting for ages for this thing! For you who don't know what a Smartphone Gramophone Amplifier is, then this part is for you: A Smartphone Gramophone Amplifier is a thing, that amplifies the audio output of your smartphone. Ot doesn't need any power, as mentioned in the firstpart of the description, you just place your phone in the phone holder and you're good to go. EnjoyThe file called: HTC_One_M7_Amp.stl is the main part, the file called: Gramo.stl is the horn. Print one of the HTC_One_M7_Amp.stl Print two of the Gramo.stl Assemble them, this part doesn't need a "Step by step Tutorial" Enjoy!