The weekly - from Stuff publishers Haymarket - launched in September. As well as backstage news and interviews relating to the ITV talent show, the magazine covered the wider music industry, fashion and showbiz gossip.
X had been intended as a year-round publication but poor sales at point-of-purchase and low subscription takeup are believed to have prompted the decision to make this week's issue - its 14th - the last.
A message posted on X's official Twitter yesterday read: "The final issue of X Mag is out on Weds. Thanks to all who worked with us and to everyone who wrote/tweeted/emailed - it's been brilliant. x"
Meanwhile, X's senior editor Peter Robinson wrote on the Popjustice forums: "Thanks to everyone who bought the magazine and in some cases enjoyed it enough to subscribe."
A spokesperson for Fremantle and Syco told DS: "We can confirm X magazine will be closing after the final of The X Factor broadcast this month. We are reviewing its status ahead of next year’s series and looking at what options there are for the magazine moving forward."