During "X" tour, Ed was suggested to use Sennheiser new gear by the monitor engineer Chris Marsh: “Digital 9000 Series has changed our lives,” says Chris. “We had been looking at ways of moving Ed’s guitar away from being wired, but we hadn’t found a good enough wireless system for him to lose the cable, which he’d been using since the very beginning. That was until we tried Digital 9000; unlike others we tried, we found it sounded even better than the cable".

Travis Scott Uses This Microphone And Other Sennheiser Wireless Microphones When He Performs

"For the duration of the tour, Beyoncé and Jay Z have relied on Sennheiser’s Digital 9000 wireless microphone system, which was purchased specifically for the tour by Eighth Day Sound Systems, Inc. at the recommendation of front-of-house engineer Stephen Curtin and monitor engineer James Berry – both veterans of the tour," states this article.

In this article on Sennheiser.com, front-of-house engineer Dave Bracey states: “This is the first time that Adele, Joe [Campbell, monitor engineer] and I have used Digital 9000,” Dave explains. “Adele had used a different Sennheiser mic for her previous tour, which she really liked. We were going to try out several alternative mics with her during rehearsals, but after we listened to the 9000 we knew we already had the winner. So we compared Adele’s previous Sennheiser mic to the Digital 9000 with a 9235 capsule with her and the 9000 sound was twice as good. It was such a leap forward straight away that we knew it was the right choice. Its whole sonic character is amazing."

The attached article via Sennheiser mentions that Pitbull and his team to begin touring with the Sennheiser Digital 9000 system.