The ATH-R50x professional open-back reference headphones deliver a natural listening experience with an expansive soundstage making them ideal for critical listening mixing and mastering across stereo surround and immersive formats. Inspired by the original ATH-R70x their re-engineered drivers produce powerful bass and accurate upper midrange ensuring clear vocals and lead instruments while maintaining overall balance. The pure open-back design provides detailed dynamic audio without artificial tuning while the fully open earcups enhance comfort. Combined with a lightweight yet durable construction and a redesigned headband the ATH-R50x is a versatile choice for both professional and home studios.FeaturesExpansive Natural SoundstageRe-Engineered 45mm Drivers for PrecisionDynamic & Detailed AudioLightweight & ComfortableVersatile Professional Performance2 Detachable Single-Sided Cables IncludedPure Open-Back DesignFully open-back sound relies solely on the performance of the driver with each diaphragm movement directly translating into sound. The ATH-R50x open-back design allows unrestricted airflow that prevents any distortion or artificial enhancement to the sound. The headphones deliver pure sound directly from the transducer for an authentic open-back experience. Lightweight DesignThe headband on the lightweight ATH-R50x (207 g) is designed to keep you comfortable for hours. The replaceable velour earpads and cooling open-back earcups add to the comfort allowing you to stay fully immersed in the audio even through the longest listening sessions.What’s in the BoxATH-R50x Open-Back Reference HeadphonesDetachable Cable (9.8’ / 3.5 mm (1/8”) gold-plated stereo mini-plug)Detachable Cable (3.9’ / 3.5 mm (1/8”) gold-plated stereo mini-plug)6.3 mm (1/4”) Stereo AdapterCarrying PouchManualSpecificationsType: Open-back referenceDriver Diameter: 45 mmFrequency Response: 5 to 40000 HzMaximum Input Power: 1600 mWSensitivity: 9

Since their release in 2015 the 99 Classics have undeniably left a big impact on the headphone cultural landscape. In this sense they have become iconic a symbol. The second generation features a number of meaningful enhancements while preserving the spirit of the original.FeaturesNeutral Balanced Engaging bass with Clear Mids and Highs40 mm Dynamic DriversBuilt Using Premium Materials (Walnut Wood Spring Steel Cast Zinc)Detachable Memory Foam Ear PadsDual-Twisted Kevlar-Wrapped OFC CableCustom 3.5 mm to USB-C Adapter with Integrated DAC/AMPWorld-Class Ergonomic Design for All-Day ComfortSame Iconic SilhouetteEverything that made the original headphone an instant classic is still present – the magnetic and inviting sound the seamless comfort the use of premium materials the timeless design aesthetic – it’s all here. However upon closer inspection and audition the enhancements become more apparent.Tuning DirectionThe 2nd Gen 99 Classics moves the signature closer to a balanced neutral target. Bass remains engaging yet slightly more restrained allowing midrange and treble details to emerge with greater clarity. The result is a more versatile headphone that retains the musical warmth of the original while offering improved overall balance and detail retrieval.Driver MatchingA refined matching process using a mixed cosine function combined with level-adjustment algorithms reduces inter-driver variance in the mid and high frequencies. The result is improved stereo image stability and a more consistent listening experience across pairs.Increased Ear Cup VolumeThe internal cup volume has been increased. A larger volume shifts cavity resonances downward and reduces standing-wave interactions enhancing control in the low-frequency region and aligning with the new tuning goals.Acoustic Sealing & Bass PortThe 2nd Gen introduces precision sealing at all key junctions. This improved sealing enables the use of a dedicated bass vent integrated into the jack

Despite the HD 660S’s standing as one of the world’s popular audiophile headphones, some customers nevertheless wanted one very specific enhancement: even deeper bass. Because whether it’s a thunderous crescendo of timpani or the pulsating beat of electronic dance music, there is nothing like accurate, powerful sub bass to infuse your listening with drama. Audiophiles—and anyone looking for comfortable, non-fatiguing, high-end headphones—can now get even more impact and emotion from the HD 660S2. The headphone’s warm, relaxed tone is reflected by their timeless styling with elegant bronze accents. With its open-back design and outstanding comfort, the HD 660S2 is also destined to be a favorite for long listening sessions. This version builds on all the strengths of its formidable predecessor. The same world-class precision and resolution still let you pick out individual instruments like with no other headphone. Or experience the joy of discovering sonic details in recordings you’ve known for years—now underscored with more and deeper low end. Indeed, the standard-setter for extended listening has now become the standard-setter for extended bass as well. Enhancing this heralded audio design without detracting from its many strengths was, however, a daunting task. So, our engineers set out to systematically identify and exploit every opportunity in their quest to improve on the acclaimed HD 660S design. We adjusted the compliance of the surround, for instance, dropping the resonance frequency to 70 Hz. Considerable effort went into optimizing the airflow around the transducer. The coil in the HD 660S2 has also been revised to match the legendary HD 600 & 650, resulting in an impedance of 300 ohms. The coil offers a high magnetic force and electrical damping for a clean impulse response. It also increases sensitivity over the entire frequency spectrum by using the magnet’s air gap more efficiently. Taken together, these efforts and more have paid off in spades. Sound pressure at the lowest octaves has doubled. Now, you can feel the music more than ever before—with all the depth and weight that ultra-low frequencies invoke. The lowest A on the piano (27.5 Hz) or the pounding root note of a bass drum (45-60 Hz) are just as big, expansive, and imposing as if they were live. The unique combination of impactful bass combined with the warm tuning and smooth treble will be a revelation for audiophile listeners. It’s an even better way to lose yourself in comfortable, non-fatiguing, high-end sound—while feeling its full low-end power.