Sirius XM Radio Inc. (SIRI) Chief Executive Officer Mel Karmazin said he will leave on Feb. 1 after clashing with John Malone, the billionaire who plans to take control of the satellite-radio operator. Karmazin, 69, will also leave the board, according to a statement yesterday. Maloneâ€™s Liberty Media Corp., which owns almost 50 percent of New York-based Sirius, is awaiting U.S. Federal Communications Commission approval to take control. The two sides have dueled verbally over Karmazinâ€™s future, with Liberty Media CEO Greg Maffei saying last month the former CBS and Viacom executive was replaceable. Karmazin, who clashed with Viacom Chairman Sumner Redstone earlier in his career, has said he was probably too expensive for Liberty. â€œYou have two really big media moguls,â€ David Bank, an analyst with RBC Capital Markets, said in a Bloomberg Television interview. â€œMel didnâ€™t have a fantastic experience working forSumner Redstone. Our sense was probably that he didnâ€™t want to work for another big media mogul. He wanted to be the decision-maker himself, and the future of the company is going to be driven by Malone.â€ A company spokesman said Karmazin declined to participate in an interview. He announced his impending resignation to Sirius employees in an e-mail last night, touting the companyâ€™s accomplishments in his eight years as CEO. Sirius rose 0.7 percent to $2.89 at the close in New York. The shares have increased 59 percent this year. [h=2]Decision Maker[/h]Malone, 71, helped Sirius avoid bankruptcy in 2009, lending the company $530 million. That deal earned Liberty billions, gave it a 40 percent stake in Sirius and put Malone on a path to control. Malone said in July he plans to spin off Sirius after gaining control. Liberty, based in Englewood, Colorado, plans to eventually execute a Reverse Morris Trust and distribute the shares to its investors while avoiding paying taxes on the separation. Differences with Karmazin emerged in March, when Liberty sought FCC approval to exercise control of Sirius without majority ownership of the stock. The executive opposed that move, and it was denied. Liberty reapplied in August, saying it intended to raise its stake to more than 50 percent. It has been adding shares since and is awaiting the end of the public-comment period.