Home / Studio & Recording / Headphones / Sennheiser HD 300 PROtect Closed-back ActiveGard Volume-limited Monitor Headphones Sennheiser HD 300 PROtect Closed-back ActiveGard Volume-limited Monitor HeadphonesGHS3,122.50 Closed-back Monitoring Headphones, with ActiveGard Automatic Limiting Technology, and Folding Earcups Out of stock SKU: HD300PRO Categories: Accessories, Headphones, Studio & Recording Tags: hd300, headphones, sennheiser Product ID: 5267