3D-printed Gramohorn II boosts your BoomSound
As part of its "Here's to Creativity" program in the UK, HTC has teamed up with designer Justin Wolter to introduce a new (and very expensive) stereo acoustic amplifier for the HTC One. A follow-up to the monaural iPhone original, the Gramohorn II is a 3D-printed megaphone-for-your-phone, which boosts volume and bass from the HTC One's BoomSound speakers through resonance and amplification. The cradle captures the output from the One's already thunderous output through two gramophone-like chambers, amplifying output without the need for any electronics.
However the Gramohorn doesn't come cheap — you're looking at £999 (around $1600) for a plaster resin build, or £4999 ($8040) in "a selection of milled metals" for the custom-made dock.
Engadget reports that separate cradles can also be used to pair the Gramohorn II with an HTC One Mini or One Max, if that's your thing.