If you’re inclined to buy retro-inspired products, then the Gramohorn II is the thing you need. This is a passive sound amplifier (no cables, no power needed) that works only for HTC One and its BoomSound™ stereo speakers. You dock your phone into this 3D-printed beauty and the sound naturally amplifies. You get a kooky, fun addition to your home’s design, which you can order in 28 different color choices. If plaster is not your material, then order a metal version for a longer life span.
