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The HD 6XX is a wired, open-back, over-ear headphone built by Sennheiser for Drop, a reissue of the HD 650. Its 300-ohm impedance and 10 Hz–41 kHz open dynamic drivers give a warm, mid-focused sound that scales with a proper amp. It suits listeners who want a comfortable, long-session headphone for vocals, acoustic music and critical listening at a desk. Against cheaper closed-back rivals it leaks sound and needs more power, but its build and tuning hold up against far pricier open-back models.
In stockSold by Peak Aura ShopReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Owners treat the HD 6XX as a reference for smooth, non-fatiguing sound and long-wear comfort. Most praise the mids and build; the common complaints are the need for amplification and the modest bass.
The Massdrop x Sennheiser HD 6XX is a pair of open, dynamic headphones in midnight blue. They have a frequency response of 10 Hz to 41 kHz and total harmonic distortion below 0.05%.
The headphones connect with a 6 ft (1.8 m) cable ending in a 3.5 mm connector. They have a nominal impedance of 300 ohms and weigh 9.2 oz (260 g) without the cable. They are made in Romania.
