The Sennheiser HD 600 are great for neutral sound and deliver a well-balanced frequency response that's well-aligned with our target. Instruments and vocals are clear and crisp, and their open design gives these headphones a spacious and immersive soundstage. However, like most open-back audiophile headphones, they lack rumble and slam in the bass range. They control their own sound profile well, with only some small peaks in their treble range that add brightness. Their impedance and sensitivity means you'll need an amp or soundcard to drive them, though.