Bang & Olufsen’s Edge speaker can be rolled to adjust the volume
https://www.theverge.com/2018/8/29/17795192/bang-olufsen-edge-speaker-price-release-date-ifa-2018
Bang & Olufsen has come to IFA 2018 with a major new speaker release: the strikingly minimal and ironically titled Beosound Edge. About the size and shape of a car wheel, the Edge is built around a large 10-inch woofer and two pairs each of 4-inch midrange drivers and 0.75-inch tweeters. It outputs sound on both sides and can be used either as a floorstanding speaker or mounted on a wall. Oh, and tilting it in either direction adjusts the volume, making the entire speaker essentially a giant volume knob. There are also touch controls at the top of the speaker to change tracks.
Famous for its mastery of aluminum, B&O put a high-gloss finish on the aluminum shell of the Edge, which the company says is an effort to “blend in by standing out.” The idea is that the Edge will reflect its surroundings, so it will match your furniture and tastefully decorated home interior by mirroring them. It is an especially alien-looking thing when hung on a wall, but I can’t deny the coolness factor of being able to raise the volume by pushing the entire speaker up. The designer of the Edge is Michael Anastassiades, who B&O says took inspiration from and recreated the proportions of the old English pound coin with this speaker.