Sennheiser HD 600 Audiophile Open-Back Dynamic Wired Headphones $256 at Amazon $256 $500 Amazon has the Sennheiser HD 600 Audiophile Open-Back Dynamic Wired Headphones for $256 with free shipping. Features a 20 to 20,000Hz frequency response, 300ohms of impedance and lightweight aluminum voice coils. $256 retail: $500 Posted by DrBatman05/28/2026 at 04:50 PM PT