Have you ever tried to hold your phone on the end such that your palm cups the speaker and it amplifies the sound? And it really does increase the sound by a huge margin. This design is basically inspired from that simple thought of cupping the phone speaker to amplify the sound. The sound coming from the speaker on the back fires on the hollow body which multiplies the intensity of sound creating a more resonating experience. The front speaker is for the highs and the rear one takes care of the low end.This is a follow up to my last project I worked on. The physical Amplification speaker. Made some improvements. Did some research and exploration on form. The curved surface helps amplifying sound better. The speaker detaches and can be used as a mini portable backpack speaker.