A benchmark for total audio immersion, the HD 650 reproduces the subtle details in your tracks with the same confidence as the highlights. With a fluid signature tuned for hours of fatigue-free listening, it is the headphone to reach for when the music matters most.

The (high) definition of smooth.

With expertly balanced acoustics, luxurious construction and timeless design, the HD 650 has all of the perks of a high-performance sports car and none of the quirks. This open-back headphone is beloved by studio professionals and audiophiles alike for its musical, non-fatiguing sound while still offering intimate levels of detail. Upon the first note, your recordings reveal their true potential, and each moment of the performance becomes an opportunity to react all over again. Whether for audio editing, mixing, mastering or critical listening, the HD 650 is an instant upgrade.

Imaging your Imagination

The HD 650s signature sound starts with Sennheiser's in-house acoustics. Audio pros know that the best components perform at their peak when nothing stands in their way. Its no surprise that the response and dimensional soundstage of the HD 650 are smoothits open earcups provide each and every soundwave ample room to expand as they would in nature. The 42mm transducer deploys a 38mm diaphragm with aluminum voice coil specifically tuned for extended, critical listening: overall treble and low-frequency presence are effortless while midrange is reproduced with lifelike composurenone sacrificing their organic roots to get there. Modern high-resolution sample rates benefit especially well from the HD 650s willingness to reveal subtle nuances without resorting to over-hyping the treble range.
Each transducer manufactured is measured against rigid specifications and paired with a perfect match for consistent representation of the entire frequency spectrum in both channels. By reducing variances between left and right channels, the headphone reproduces mastering-grade sound independent of room acoustics or loudspeaker positioning..

Made For More

Everything about the HD 650 was made with more in mind: more details discovered, more musicality, and definitely more time for monitoring. Made in Ireland at a state-of-the-art production facility, the HD 650 combines the best of modern transducer manufacturing with the attention to detail required to handle a wide variety of acoustic materials. Sennheiser's production tolerances are extremely tight, ensuring that your HD 650 experience is consistent with those all over the globe, whenever or wherever it was purchased. For example, the resonators feature stainless steel mesh to guarantee uniform performance after manufacturing. Even better, most parts on the HD 650 are modular, making it a dream to keep operational as your go-to reference monitoring solution. From the velour pads to the earcup grille pattern, each component was crafted to guarantee a next-level personal sound experience so you can enjoy your music even more.

Its All About Connection

Your HD 650 comes with a detachable, impedance-matched cable with ultra-low capacitance. The ¼-inch / 6.3mm stereo connector offers the audiophile-standard plug for connection to devices such as headphone amplifiers and A/V receivers, digital audio players, computer-based workstations, analog gear, and more. At 9.8 feet / 3m long, it offers unencumbered listening on gear deep within your shelves, studio, or desktop. A flexible adapter is included to reduce the 6.3mm to 3.5mm / -inch for plugging into countless other audio devices.

Specifications