Adam Ben Ezra’s All-Bass Cover of AMC’s “Mad Men” Theme Opening Credits Song. Bass Is All You Need. RealTDragonNovember 1, 2010 All you need is bass, here is Adam Ben Ezra’s All-Bass version cover of AMC’s “Mad Men” opening credits song. It contains some splendid cuts, angles, and bass instruments. The song has such a catchy upbeat vibe.