The Leverage Equation: How to Work Less, Make More, and Cut 30 Years Off Your Retirement Plan (Financial Freedom for Smart People)

beyerdynamic DT 270 PRO Compact Circumaural Studio Headphones for Recording, Monitoring & Content Creation

beyerdynamic DT 770 PRO 80 Ohm Over-Ear Studio Headphones in Gray. Enclosed Design, Wired for Professional Recording and Monitoring

beyerdynamic DT 700 PRO X Closed-Back Studio Headphones with Stellar.45 Driver for Recording and Monitoring on All Playback Devices

beyerdynamic DT 770 Pro 250 ohm Professional Studio Headphones (Limited Black Edition)

beyerdynamic DT 990 PRO Over-Ear Studio Monitor Headphones - Open-Back Stereo Construction, Wired (80 Ohm, Grey)

beyerdynamic DT 990 Pro Over-Ear Studio Monitor Headphones - Open-Back Stereo Construction, Wired (80 Ohm, Black (Limited Edition))

beyerdynamic DT 770 Pro Studio Headphones - Over-Ear, Closed-Back, Professional Design for Recording and Monitoring (80 Ohm, Grey)

beyerdynamic DT 770 Pro 80 ohm Limited Edition Professional Studio Headphones, Black