The Sennheiser HD 660S2 headphones are on sale for $349.99 on Woot (originally $679.95). They feature an open-back design for ...

The HD 620S are the latest addition to Sennheiser ... you are hearing – there is no sound leakage, unlike open-back headphones. We suspect the higher-than-usual clamping force of the headband ...

Learn more about how we select deals. SAVE 51%: The open-back Sennheiser HD 599 headphones are on sale for just $96.99 at Amazon, down from the usual price of $199.95. That's a savings of $102.96.