Weve come across all kinds of electronics-free acoustic amplifiers in the iPhone accessories market, but stereo horns for a non-Apple device? Thats a double-first for us. For the debut act of HTCs Heres To Creativity campaign to support young artists in the UK, the phone maker commissioned designer Justin Wolter to come up with an HTC One edition of his mono Gramohorn, which was originally made for — you guessed it — the iPhone.