Open-back vs. Closed-back Headphones: What's the Difference?
Best Closed-Back Headphones: Main Discussion
OPPO PM-3 Closed-Back Planar Magnetic Headphones
Sennheiser HD 280 Pro Circumaural Closed-Back Monitor 506845 B&H
Amazon.com: Shure SRH1540 Premium Closed-Back Headphones with 40mm Neodymium Drivers for Clear Highs and Extended Bass, Built for Professional Audio/Sound Engineers, Musicians and Audiophiles (SRH1540) : Musical Instruments