Choosing between two legendary headphones can be a delightful dilemma for audiophiles. The Sennheiser HD 6XX and HD 660S, both revered for their exceptional sound quality, often find themselves at the center of this debate. If you’re looking to elevate your listening experience, understanding the nuances that set these two titans apart is crucial.
The HD 6XX, a Massdrop collaboration, has carved out a significant niche with its unique tuning and value proposition. Meanwhile, the HD 660S represents Sennheiser’s evolution, offering a refined sound signature designed for the discerning listener. This comparison aims to demystify their differences.
We’ll delve into their sonic characteristics, comfort, build, and ultimately, help you decide which of these audiophile darlings is the perfect match for your ears and your music.
Specs at a Glance
| Feature | hd 6xx | hd 660s |
|---|---|---|
| Type | Open-Back | Open-Back |
| Driver Type | Dynamic | Dynamic |
| Impedance | 300 Ohms | 150 Ohms |
| Sensitivity | 103 dB | 104 dB |
| Frequency Response | 10 – 41,000 Hz | 10 – 41,000 Hz |
| Weight | ~260g | ~260g |
| Cable Connector | Proprietary (Sennheiser) | 3.5mm (1/4″ adapter included) |
| Ear Cup Material | Velour | Velour |
| Headband Material | Padded Leatherette | Padded Leatherette |
| Connectivity | Wired | Wired |
| Detachable Cable | Yes | Yes |
| Soundstage | Wide | Moderate |
Feature-by-Feature Breakdown
Driver Technology
- Hd 6xx: Features Sennheiser’s proprietary 38mm dynamic drivers, known for their open-back design and excellent transient response. This contributes to a natural and spacious soundstage, though some might find them slightly less dynamic than newer models.
- Hd 660s: Utilizes a newly developed 38mm dynamic driver with a lower impedance (150 ohms) compared to the HD 6XX (300 ohms). This driver offers a more refined and detailed sound, with improved bass control and a slightly more forward presentation, making it easier to drive.
- Winner: hd 660s
Impedance
- Hd 6xx: Boasts a high impedance of 300 ohms. This means it requires a dedicated headphone amplifier to reach its full sonic potential and achieve optimal volume levels. Without an amp, the sound can be perceived as thin and lacking impact.
- Hd 660s: Features a lower impedance of 150 ohms. While still benefiting from an amplifier, it is significantly easier to drive and can produce acceptable volume levels even from certain higher-end portable music players or sound cards.
- Winner: hd 660s
Sound Signature/Tuning
- Hd 6xx: Renowned for its balanced and neutral sound profile with a slight emphasis on the mid-range, making vocals and instruments sound very natural. The treble is smooth and non-fatiguing, while the bass is present but not overpowering. It’s a classic, well-regarded tuning for many genres.
- Hd 660s: Offers a slightly more energetic and engaging sound with a bit more sparkle in the treble and a more impactful bass response compared to the HD 6XX. The mid-range remains strong, but the overall tuning leans towards a more modern, consumer-friendly sound that can be more exciting for certain music.
- Winner: hd 660s
Soundstage and Imaging
- Hd 6xx: Possesses an excellent, wide, and natural soundstage for an open-back headphone. Instruments are well-separated and placed accurately within the soundscape, providing an immersive listening experience.
- Hd 660s: While still good, the soundstage on the HD 660s is generally considered to be slightly narrower and more intimate than the HD 6XX. Imaging is precise, but the sense of spaciousness is a step down.
- Winner: hd 6xx
Comfort and Build Quality
- Hd 6xx: Features a classic, lightweight plastic construction with velour earpads that offer good comfort for extended listening sessions. The clamping force is moderate, and they are known for their durability.
- Hd 660s: Shares a very similar build and comfort profile to the HD 6XX, with the same comfortable velour earpads and lightweight design. The materials feel robust and premium, contributing to a high-quality feel.
- Winner: Tie
Connectivity/Cables
- Hd 6xx: Typically comes with a single 10-foot (3-meter) cable with a 1/4-inch (6.35mm) termination. An adapter to 3.5mm is usually included.
- Hd 660s: Bundles two cables: one 10-foot (3-meter) cable with a 1/4-inch (6.35mm) termination and a shorter 4.9-foot (1.5-meter) cable with a balanced 4.4mm Pentaconn connector. This offers more versatility for different setups.
- Winner: hd 660s
Bass Response
- Hd 6xx: Offers a natural and articulate bass response that is well-integrated into the overall sound. It’s detailed and controlled but may lack the sheer impact and rumble that some listeners prefer for genres like EDM or hip-hop.
- Hd 660s: Provides a more impactful and slightly more extended bass response than the HD 6XX. It has better sub-bass presence and a generally more engaging low-end, making it more satisfying for bass-heavy music.
- Winner: hd 660s
Treble Response
- Hd 6xx: Features a smooth and refined treble that is detailed without being sibilant or fatiguing. It contributes to the headphone’s relaxed and natural listening experience, though some may find it a touch reserved.
- Hd 660s: Presents a slightly brighter and more energetic treble than the HD 6XX. It offers a touch more air and sparkle, which can enhance clarity and detail retrieval, but it could be perceived as slightly less forgiving on poorly mastered tracks.
- Winner: hd 660s
Winner by Category
| Category | Winner |
|---|---|
| Soundstage | hd 6xx |
| Detail & Clarity | hd 660s |
| Bass Response | hd 660s |
| Mid-Range | hd 660s |
| Treble | hd 660s |
| Comfort | Tie |
| Build Quality | Tie |
| Ease of Driving | hd 660s |
| Value (often) | hd 6xx |
What They Have in Common
- Open-Back Design: Both headphones feature an open-back construction, which contributes to a more natural and spacious soundstage, allowing sound to escape and air to circulate. This design is ideal for critical listening in quiet environments.
- Dynamic Drivers: They utilize dynamic driver technology, known for its ability to produce a wide range of frequencies and a good balance of bass, mids, and treble. This ensures a detailed and engaging listening experience across various music genres.
- Comfortable Fit: Both models are praised for their exceptional comfort, featuring plush velour earpads and a well-padded headband that distribute weight evenly for long listening sessions without fatigue.
- Sennheiser Build Quality: You can expect the robust and durable build quality that Sennheiser is renowned for. Both headphones are constructed with high-quality materials designed to last.
- Similar Frequency Response: They share an identical stated frequency response range, indicating a similar potential for reproducing the full spectrum of audible sound, from deep bass to very high treble.
- Wired Connectivity: Both are strictly wired headphones, prioritizing audio fidelity and eliminating the complexities and potential compromises of wireless connections.
Hd 6Xx Vs Hd 660S Buying Guide
For the Budget-Conscious Audiophile
If your primary concern is getting the most bang for your buck without significant compromise, the HD 6XX often emerges as the victor. Its legendary sound signature, lauded for its natural tonality and expansive soundstage, is available at a more accessible price point, especially during Massdrop/Drop promotions. This makes it an excellent entry into high-fidelity audio for those mindful of their spending. (See Also: Nest Cam Vs Ring )
For the Modern, Versatile Listener
The HD 660S is designed for those who value a slightly more refined and modern sound profile. While it retains much of the Sennheiser DNA, it offers a touch more clarity and a slightly warmer bass response, making it a versatile choice for a wider range of music genres. Its easier impedance also means it can be driven effectively by a broader array of sources, including portable devices.
For the Seekers of Detail and Imaging
While both headphones excel in detail retrieval, the HD 660S might appeal more to listeners who prioritize pinpoint imaging and a slightly more forward presentation of instruments. Its tuning can make individual elements in a mix stand out with greater precision. However, the HD 6XX’s more relaxed and natural soundstage can also be interpreted as a form of detail, offering a more cohesive and immersive listening experience.
For the Long-Term Investment and Community Support
The HD 6XX benefits from a massive and active community, meaning ample resources for modding, troubleshooting, and resale. Its established reputation as a benchmark for affordable audiophile headphones assures a solid long-term investment. The HD 660S, being a newer model, has a growing following, but the sheer volume of shared experience with the HD 6XX is currently unmatched. (See Also: Lose It Vs Weight Watchers )
Who Should Buy What?
Buy hd 6xx If…
- You prioritize a wide and immersive soundstage for enjoying music in a quiet, dedicated listening space.
- You prefer a slightly warmer and more relaxed sound signature that is forgiving of less-than-perfect recordings.
- You are looking for a headphone that is often available at a more accessible price point through Massdrop/Drop.
- You don’t mind a slightly higher impedance and have a headphone amplifier to drive them optimally.
Buy hd 660s If…
- You desire a more analytical and detailed sound with better separation and clarity, especially in the mid-range.
- You listen to a variety of music genres and appreciate a more neutral and accurate sound reproduction.
- You need a headphone that is easier to drive from various sources, including some portable devices, due to its lower impedance.
- You appreciate a slightly more forward and engaging presentation of vocals and instruments.
Frequently Asked Questions
Which headphone is easier to drive?
The Sennheiser HD 660S is generally easier to drive due to its lower impedance (150 ohms) compared to the HD 6XX (300 ohms). While both benefit from a dedicated headphone amplifier for optimal performance, the HD 660S can achieve satisfactory listening volumes with a wider range of source devices, including some smartphones and laptops. The HD 6XX, with its higher impedance, will more readily benefit from a more powerful amplifier to reach its full sonic potential.
Is the HD 6XX or HD 660S better for gaming?
Both headphones offer excellent soundstage and imaging, which are crucial for gaming. However, the HD 660S might have a slight edge for some gamers due to its slightly more forward treble and clearer separation of sounds, which can help in pinpointing enemy footsteps or distant gunfire. The HD 6XX’s more relaxed presentation can also be beneficial for long gaming sessions, offering a more natural and less fatiguing experience.
Which headphone has a better bass response?
The HD 660S generally offers a slightly more pronounced and impactful bass response than the HD 6XX. While the HD 6XX’s bass is well-controlled and natural, the HD 660S provides a touch more warmth and extension, making it more engaging for genres that rely heavily on low-end frequencies. However, neither headphone is a basshead’s dream; their bass is refined and serves the overall balance rather than dominating the sound. (See Also: Bose Quiet Comfort Vs Airpods Pro )
Can I use the HD 6XX or HD 660S with my phone?
You can technically use both headphones with your phone, but the experience will vary significantly. The HD 660S, with its lower impedance, will produce a more audible volume from most phones. However, to truly appreciate the sound quality of either headphone, a dedicated headphone amplifier is highly recommended. Phones typically lack the power to drive these headphones to their full potential, resulting in a less dynamic and detailed sound.
Which is better for vocal listening?
Both headphones are renowned for their exceptional vocal reproduction, a hallmark of Sennheiser’s open-back designs. The HD 6XX is often praised for its incredibly natural and intimate vocal presentation, making singers feel present in the room. The HD 660S also excels with vocals, offering a touch more clarity and presence, which can make certain vocalists sound more defined and dynamic. The choice often comes down to personal preference for a slightly warmer or brighter vocal tonality.
Final Verdict
The Sennheiser HD 6XX and HD 660S are both exceptional headphones, but they cater to slightly different preferences. The HD 6XX offers a legendary, natural soundstage and is a fantastic value. The HD 660S provides a more refined, modern sound with slightly better bass extension and imaging. For most, the HD 6XX represents a more compelling overall package given its price and iconic status.
Winner: Hd 6XX