He changed the music industry when he represented Sam Cooke in negotiations with RCA , winning the artist control of his own master recordings . Allen Klein , who inked contracts for dozens of musicians , died at age 77 . Klein 's company , ABKCO , built up catalog of artists to more than 2,000 songs . Known for his tough management style , many blame him for the Beatles ' break - up .
Allen Klein , who inked contracts for dozens of musicians , died at age 77 . Klein 's company , ABKCO , built up catalog of artists to more than 2,000 songs . Known for his tough management style , many blame him for the Beatles ' break - up .