X-Ray Specs

HD 600 was developed to give listeners an impartial scale of everything before it in the audio chain.

Purpose-built to vanish when the listener presses “play”, the HD 600 is the benchmark reference headphone for both analyzing and enjoying your hi-fi setup. This disappearing act starts with an innovative, systematic approach to sound reproduction using transparency as the driving principle. Leveraging Sennheiser’s progressive production techniques and computer-based transducer optimization, it perfectly fuses the art of sound with the science of it.

Opening Up Your Mind

The foundation of the HD 600 transducer system is an acoustically transparent open-back earcup that lets every single sound wave expand freely — a Sennheiser innovation pioneered and perfected for the most natural personal listening experience.

Sound emanating from our exclusive 42mm driver is free from turbulence and distortion thanks to a specialized acoustic silk that controls airflow—one of the finest materials available for this task—while requiring hand assembly. By using ultralight aluminum voice coils, the 38mm diaphragm exhibits rapid rest and response times for clinical detail that never sounds harsh or hyped. Across the entire audible spectrum of sound, this combination of driver size and integrity delivers an articulate response that is honest to the source—the kind of listening experience required to absorb the details with confidence.

The 300-ohm impedance of the HD 600 presents a unified backdrop that allows the nuances in your music collection to leap forward like you have never heard before. Each transducer is measured against rigid standards for consistent performance across 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.

Quality Control

There’s a reason many have trusted their HD 600 for decades: Sennheiser worked tirelessly to build a headphone with luxurious comfort and lasting durability.

The HD 600 is assembled in Ireland at a state-of-the-art production facility with the attention to detail required to handle a wide variety of acoustic materials. Our production tolerances are extremely tight, ensuring that your HD 600 experience is consistent with those all over the globe, whenever or wherever it was purchased — a necessity for professional users. For example, the resonators feature stainless steel mesh to guarantee uniform performance after manufacturing.

The velour HD 600 padding is supple to the touch for extended listening at your hi-fi stack. Even the earcup grille pattern was crafted specifically for this transducer system, guaranteeing a pristine personal sound experience.

Most parts on the HD 600 are modular, making it a dream to keep operational as the go-to reference headphones, regardless of your listening space’s acoustics. It’s all backed by Sennheiser’s two-year warranty. 

It’s All About Connection

Your HD 600 comes with a detachable, impedance-matched cable with ultra-low capacitance.

At 9.8 feet / 3m long, the included cable offers unencumbered listening on gear deep within your shelves or in a favourite listening chair.

The ⅛-inch / 3.5mm stereo connector offers the standard plug for connection to modern listening devices. A premium adapter is included to increase the 3.5mm to 6.3mm / ¼-inch for plugging into countless other audio devices such as headphone amplifiers, A/V receivers, digital audio players, analog gear, and more. 

What’s Included

• HD 600 headphones
• 3-meter 1/8″ (3.5 mm) cable
• Adapter to 1/4″ (6.3 mm) stereo jack plug
• 2-year warranty