Following the success of last year’s 805 Maserati Edition loudspeaker, the British audio company Bowers & Wilkins has again partnered with the Italian automaker. The P5 Maserati Edition Mobile Hi-Fi headphones ($400) feature a handsome blue-leather lining for the headband and ear pads, gold-plated connector, and the same drivers as in the original P5 headphones, which use neodymium magnets and Bowers & Wilkins’ Mylar diaphragms to faithfully reproduce audio. Additional touches include detachable ear pa…