They’ve claimed the hearts of some big-name players in recent years. Is this the end of the humbucker? For decades, the humble humbuckers have been the pickup for metal and beyond. But P-90s have risen through the ranks in recent years, and they’ve got some high-profile advocates.   Among them is Modern Metal Academy’s own John Browne, who once told us that P-90s were the closest he’s gotten to seeing God. But what are they, why are they suddenly in vogue, and should you get