Sound Quality & Design Philosophy
The HD 600 represents Sennheiser's legendary open-back design with its famous natural, reference-quality sound signature that's been praised by audiophiles for decades. Its open design creates an expansive soundstage with excellent imaging. The HD 620S takes a different approach with its closed-back design, offering punchy bass response and excellent noise isolation while maintaining Sennheiser's signature clarity and detail retrieval.
Practical Usage & Environment
The HD 600's open-back design makes it ideal for quiet listening environments like dedicated listening rooms or studios, but sound leaks both in and out. The HD 620S excels in versatile scenarios - from noisy offices to commuting - thanks to its closed-back isolation. The HD 620S also works better with mobile devices and doesn't require as much amplification as the HD 600.
Build Quality & Comfort
Both headphones feature Sennheiser's excellent build quality with replaceable parts and long-term durability. The HD 600 uses the classic plastic construction that's proven reliable over decades. The HD 620S incorporates more modern materials while maintaining the comfortable fit Sennheiser is known for. Both offer excellent long-session comfort with well-padded headbands and ear cups.
