(TrendHunter.com) Mark Levinson, a high-end electronics brand beloved by audiophiles, has announced the launch of its first headphone, the No 5909. After spending the last 50 years focusing primarily on hi-fi... (TrendHunter.com) Mark Levinson, a high-end electronics brand beloved by audiophiles, has announced the launch of its first headphone, the No 5909. After spending the last 50 years focusing primarily on hi-fi...