Sennheiser HD 660S 2 Open-Back Review: Who It Fits and Who Should Skip It
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This sennheiser HD 660s 2 open back review covers the Sennheiser HD 660S 2, an over-ear, open-back headphone designed for high-fidelity audio. It features 42 mm transducers with an ultra-light aluminum voice coil to deliver detailed sound. The wired connection ensures a stable signal without latency. These headphones are built for immersive listening, offering a spacious soundstage and precise frequency response. They are crafted in Germany and Ireland for durability. The design prioritizes comfort with breathable ear cushions for long sessions. This model is intended for listeners who value clarity and natural sound reproduction in a stationary setting.
What stands out
- 42 mm transducers with ultra-light aluminum voice coil
- Open-back acoustic design for a spacious soundstage
- Wired connectivity for stable, latency-free audio
- Frequency range from 27.5 Hz to 45–60 Hz bass response
- Weight of 10.6 ounces for balanced over-ear fit
Who it fits
Good fit for
This headphone suits audiophiles, music producers, and desktop listeners who prioritize sound accuracy. The open-back design creates a natural, spacious soundstage ideal for critical listening. The wired connection eliminates wireless interference, which benefits studio work and gaming. The plush ear cushions support long listening sessions without fatigue. If you use a dedicated audio setup or desktop computer, these headphones deliver the clarity and detail needed for high-resolution music and precise audio monitoring.
Who should skip it
You should look elsewhere if you need wireless freedom. This model uses a wired connection, so it requires a cable to function. It is not suitable for commuting or moving around. The open-back design allows sound to escape, so it will disturb others in quiet environments. It also offers no noise isolation. If you need to block out background noise or use the headphones in public spaces, this open-back design will not meet your needs. Consider closed-back alternatives instead.
Verdict: The Sennheiser HD 660S 2 is a precise, wired open-back headphone built for accurate sound reproduction. It fits listeners who want a spacious soundstage and do not need wireless connectivity or noise isolation.
Key specs explained for Sennheiser HD 660S 2
Driver Size: 42 mm
This size balances detail and bass response. The 42 mm transducers help produce deep, controlled sub-bass down to 27.5 Hz while maintaining clear highs. You get rich mids and precise imaging. This setup suits listeners who want full-range accuracy without excessive size. Compare this to smaller drivers that may lack low-end impact or larger ones that prioritize volume over detail.
Form Factor: Over-ear, open-back
Over-ear cups cover your ears for isolation and comfort. The open-back design lets sound escape, creating a natural, spacious soundstage. This makes instruments and voices feel positioned around you rather than inside your head. It is ideal for quiet home listening or studio work. Avoid these for noisy commutes or shared spaces where sound leakage matters.
Connectivity: Wired
A wired connection provides a direct signal path with no latency or interference. You get consistent audio quality without worrying about battery life or pairing issues. This stability benefits critical listening, gaming, and professional monitoring. You need a compatible audio interface or amplifier to drive these effectively. Wireless alternatives may introduce compression or dropouts.
Weight: 10.6 ounces
This weight is moderate for over-ear headphones. The aluminum voice coil helps keep the assembly light while maintaining rigidity. You can wear these for long sessions without significant fatigue. The plush ear cushions distribute pressure evenly. Compare this to heavier models that may cause neck strain or lighter ones that might feel less substantial during intense listening.
Design and Build Quality
The Sennheiser HD 660S 2 features an open-back over-ear form factor. According to the listing, these headphones are crafted with expertly crafted materials in Germany and Ireland. This manufacturing choice suggests a focus on durability and elegance. The build aims to support long-lasting performance for music lovers and production work. You get a premium feel that matches the audiophile-grade sound profile.
The design includes breathable, plush ear cushions. This layout ensures fatigueless listening during extended sessions. The open-back architecture allows for a spacious soundstage, which enhances immersive music experiences. You can use these headphones for gaming, professional tasks, or desktop listening without discomfort. The fit is described as comfortable, making them suitable for various users.
Physical dimensions are listed as 7 inches in width and height, with a length of 3 inches. The color is black, and the model number is 700240. The size is categorized as medium. Weight is specified at 10.6 ounces. This mass is manageable for stationary use. The wired connectivity ensures a stable signal. You do not need to worry about battery life or wireless interference. The design prioritizes audio fidelity and physical comfort over portability.
Setup And Everyday Use
Setting up the Sennheiser HD 660S 2 is straightforward because the headphones use a wired connection. You simply plug the cable into your audio source. This wired setup ensures a stable signal without the need for Bluetooth pairing or charging. There are no software updates or companion apps to manage. You connect the device and listen immediately. The open-back design means you do not need to worry about seal integrity. Sound escapes from the back of the ear cups. This requires a quiet environment. You cannot use these headphones on a busy commute or in noisy public spaces. The signal remains clear and direct through the wire.
Daily use focuses on stationary listening. The 42 mm transducers and ultra-light aluminum voice coil deliver detailed highs and deep sub-bass. You can hear piano lows down to 27.5 Hz. The headphones weigh 10.6 ounces. They are medium-sized. The over-ear form factor with plush ear cushions allows for long sessions. The open-back design promotes breathability. This helps reduce heat buildup during extended use. The build quality is crafted in Germany and Ireland. This suggests durability for regular desktop use. You can use them for music production, gaming, or podcasting. The spacious soundstage provides an immersive experience. However, the open design means others nearby can hear your audio. You must ensure you are in a private space. The wired connection eliminates latency issues common in wireless devices. This makes them suitable for professional tasks where timing matters. You get precise imaging and rich mids. The setup is minimal, and the daily routine is simple. You plug in and enjoy high-fidelity audio.
What You Need To Know
You need a dedicated amplifier for these Sennheiser HD 660S 2 headphones. The 42 mm drivers require sufficient power to deliver their full frequency range, especially the deep sub-bass down to 27.5 Hz. Without adequate amplification, the sound may feel thin or lack impact. You should also verify your audio source supports high-resolution wired audio. The open-back design means you will hear surrounding noise, and others may hear your music. This makes them unsuitable for noisy environments or shared spaces. Care for the plush ear cushions to maintain comfort during long sessions. Keep the aluminum voice coil clean and avoid dropping the unit. Compared to closed-back or wireless options in Headphones & Earbuds, these prioritize acoustic purity over convenience. They fit best in quiet, controlled listening environments where you can appreciate the spacious soundstage. Check your desk space for the cable management needed for a wired setup.
Check before you buy
- Verify you have a powerful enough amplifier for full bass response.
- Ensure your listening environment is quiet enough for open-back design.
- Check that your audio source supports wired high-fidelity output.
- Confirm you have space for cable management on your desk.
The product at a glance
Sennheiser HD 660S 2 Open-Back Headphones
Best for: Critical listening and studio monitoring
- Form Factor
- Over-ear, open-back
- Connectivity
- Wired
- Driver Size
- 42 mm
- Color
- Black
- Dimensions
- 3 × 7 × 7 inches
- Weight
- 10.6 ounces
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The Sennheiser HD 660S 2 are open-back, wired headphones designed for high-fidelity audio. They feature 42 mm transducers with an ultra-light aluminum voice coil, delivering detailed highs and deep bass down to 27.5 Hz. Weighing 10.6 ounces, they offer a spacious soundstage and plush ear cushions for long listening sessions. These headphones suit listeners who prioritize natural, immersive sound quality.
Pros
- 42 mm transducers with ultra-light aluminum voice coil
- Open-back design provides a spacious soundstage
- Frequency response extends to 27.5 Hz for deep bass
- Plush ear cushions ensure comfort during long sessions
- Wired connectivity eliminates latency and charging needs
Cons
- Open-back design allows sound leakage
- Wired connection limits mobility
- No included carrying case or wireless option
Good fit if
- You want accurate, natural sound for music production
- You prioritize comfort during long listening sessions
Skip if
- You need to block out background noise
- You require wireless connectivity for mobility
Verdict: Sennheiser HD 660S 2 Open-Back Headphones fit listeners who value precise audio reproduction and comfort over portability. They are ideal for stationary use in quiet environments.
Specifications side by side
| Spec | Sennheiser HD 660S 2 Open-Back Headphones |
|---|---|
| Form Factor | Over-ear, open-back |
| Connectivity | Wired |
| Driver Size | 42 mm |
| Acoustic Design | Open-Back |
| Color | Black |
| Dimensions | 3 × 7 × 7 inches |
| Weight | 10.6 ounces |
| Size | Medium |
| Model | 700240 |
Frequently asked questions
Is the Sennheiser HD 660S 2 good for studio monitoring?
Yes. The listing states these headphones are best for critical listening and studio monitoring. They fit listeners who value precise audio reproduction. This design prioritizes accuracy over portability. You should use them in quiet environments for stationary use. The open-back design supports detailed sound analysis for professional tasks.
What are the physical dimensions of the Sennheiser HD 660S 2?
The headphones measure 7 inches in width and height, with a length of 3 inches. These dimensions classify the size as medium. The model number is 700240. The color is black. These physical specs help you determine if the ear cups fit your head shape comfortably during long listening sessions.
How much do the Sennheiser HD 660S 2 headphones weigh?
They weigh 10.6 ounces. This weight contributes to the medium size classification. The heft suggests a substantial build. You get a secure fit that does not feel flimsy. The weight distribution helps with long-term comfort during stationary listening sessions in your home studio or office.
Are the Sennheiser HD 660S 2 open-back or closed-back?
They are open-back. This acoustic design allows air to pass through the ear cups. It creates a natural, spacious soundstage. You must use them in quiet environments. Sound will leak out, and outside noise will enter. This makes them unsuitable for noisy public spaces or shared rooms.
Can I use the Sennheiser HD 660S 2 for gaming?
They are ideal for stationary use. The open-back design provides precise imaging. This helps you locate sounds accurately. However, sound leakage means others can hear your game audio. You should only use them in a private room. The focus is on critical listening rather than portable gaming.
What color options are available for the Sennheiser HD 660S 2?
The listed color is black. This neutral shade fits most home studio setups. The black finish complements the professional aesthetic. You get a consistent look for your audio gear. The color choice does not affect the acoustic performance or the comfort of the ear pads.