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Description
Sennheiser HD 660S2 Open-Back Audiophile Wired Headphones - BlackProduct Description: Sennheiser HD 660S2 wired headphones deliver detailed high fidelity audio with an open back design, natural soundstage, and enhanced low frequency extension. The precision matched 38mm dynamic transducers reproduce clear vocals, detailed instruments, and controlled bass for critical listening, music production, home audio, and audiophile entertainment. With a 300 ohm impedance, the HD 660S2 is designed for use with capable
Product Description:
Sennheiser HD 660S2 wired headphones deliver detailed high-fidelity audio with an open-back design, natural soundstage, and enhanced low-frequency extension. The precision-matched 38mm dynamic transducers reproduce clear vocals, detailed instruments, and controlled bass for critical listening, music production, home audio, and audiophile entertainment.
With a 300-ohm impedance, the HD 660S2 is designed for use with capable headphone amplifiers, DACs, audio interfaces, and premium home stereo equipment. Lightweight construction, soft velour ear cushions, and an ergonomic over-ear fit provide lasting comfort during extended listening sessions.
The headphones include both a standard 6.3mm cable and a balanced 4.4mm cable, plus a 3.5mm adapter and protective carrying pouch.
Key Features:
- Premium open-back audiophile headphones
- Detailed, natural sound with enhanced sub-bass response
- Precision-matched 38mm dynamic transducers
- Ultra-light aluminium voice coils
- Wide frequency response from 8Hz to 41,500Hz
- 300-ohm impedance for high-quality amplified listening
- Open ear cups provide a spacious, natural soundstage
- Over-ear design with soft velour ear cushions
- Lightweight 260g construction
- Includes standard and balanced audio cables
- Detachable cable design
- Made in Ireland
- Ideal for critical listening, home audio, mixing, and music enthusiasts
Specifications:
- Brand: Sennheiser
- Product Type: Wired Audiophile Headphones
- Model: HD 660S2
- Colour: Black
- Headphone Style: Over-Ear
- Acoustic Design: Open-Back
- Transducer Type: Dynamic
- Transducer Size: 38mm
- Frequency Response: 8Hz–41,500Hz
- Impedance: 300 Ohms
- Sound Pressure Level: 104dB at 1kHz / 1Vrms
- Total Harmonic Distortion: Less Than 0.04%
- Cable Length: 1.8m
- Connections: 6.3mm Stereo and 4.4mm Balanced
- Adapter: 6.3mm to 3.5mm
- Wireless Connectivity: No
- Noise Cancellation: No
- Weight: Approximately 260g
- Included Components: HD 660S2 Headphones, 6.3mm Cable, 4.4mm Balanced Cable, 3.5mm Adapter and Carrying Pouch
- Condition: New
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 625 reviews
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Product Reviews
★★★★★ 5
Reliable protection that stays put during workouts!
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
I’ve tried many expensive name-brand sunscreens, but this Amazon Basics version performs just as well, if not better. It’s become my go-to for morning runs and trips to the beach because it actually stays on even when I’m sweating.
Why I gave it 5 stars:
Non-Greasy Formula: Unlike other sport sunscreens, this one absorbs quickly and doesn't leave that heavy, sticky film on my skin.
Actually Water Resistant: I’ve used it for laps in the pool and long hikes; as long as I reapply as directed, I haven't had a single sunburn.
No "Sting": One of the best things is that it doesn't run into my eyes and sting when I start to sweat—a huge plus for runners.
Great Value: You get a generous 8-ounce bottle for a fraction of the price of "premium" brands. The fact that it’s formulated without Oxybenzone is an added bonus for peace of mind.
If you’re looking for effective, no-frills sun protection for an active lifestyle, you can't beat this. It’s a staple in my gym bag now!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
★★★★★ 5
Great value and very practical
Style: SPF 50, Size: 8 Fl Oz (Pack of 6)
This sunscreen is a great value for the price. The SPF 50 protection works well and the lotion applies smoothly without feeling too greasy. It absorbs nicely and provides good coverage for outdoor activities.
I especially like using these bottles to refill the sunscreen dispensers at my Airbnb for guests. It’s convenient, reliable, and affordable when you need multiple bottles available.
Overall, it’s a solid everyday sunscreen and a very practical option if you need good protection at a reasonable price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 4
good price for good product. applies well, shake and store upright
Style: SPF 50, Size: 8 Fl Oz (Pack of 1), Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
I believe it is equal to the name brands
It is 50 SPF Sun Protection Factor so it offers strong UV A and UV B protection which are the 2 ranges of sun rays that do the skin damage and burning.
It is an easily absorbed lotion that when rubbed goes into the skin and is not visible. It is thick and goes on with a non shiny, non greasy, solid thick feeling which is what we need for it to stay on as long as possible.
It feels good after being rubbed in in that it feels dry and not overly greasy or with no shine and sheen.
It is a good product and offers burn protection to me in some clear-sky strong sun uses.
Reapply after entering the pool water or swimming laps and after an hour (all sunscreen labels say reapply after 80 minutes which I believe is per recommendations of the federal FDA or some medical studies).
I reapply often and I still get tanned but I do not want to burn.
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Reviewed in the United States on August 9, 2025
★★★★★ 5
Survived the sun like a pasty legend
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
I bought this sunscreen because I’m basically a human marshmallow — one hour in the sun and I’m toasted. This Amazon Basics Sport SPF 50? It’s like armor for the pale and easily crisped. I slathered it on before a full day of hiking, sweating, and pretending I enjoy direct sunlight, and guess what? No burn. Not even a pink glow. Just victory.
It goes on smooth, doesn’t feel greasy, and somehow stayed put through sweat, water, and my dog licking my arm. It’s fragrance-free, which means I didn’t smell like a coconut smoothie or a chemical spill — just clean and protected.
Pros:
• High SPF that actually works
• Sweat and water resistant — like, impressively so
• No greasy residue or weird smell
• Affordable and comes in a big ol’ bottle
• Didn’t turn me into a lobster (the bar is low, but still)
Minor feedback:
It’s not fancy or trendy, but honestly, I’m here to not burn — not win a skincare award. Also, it takes a bit of rubbing in, but once it’s on, it’s locked and loaded.
Final thoughts:
If you want solid sun protection without the drama, this stuff delivers. Whether you’re hiking, swimming, or just trying to survive summer, it’s a reliable sidekick. Would absolutely buy again — my skin demands it.
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Reviewed in the United States on November 7, 2025
★★★★★ 5
Great Sunscreen at a Great Price!
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
Love this sunscreen. I live in FL and like to walk most mornings, and need a good sunblock. This Amazon Basics is far better than my previous, far more expensive brand. It's a great price for great quality. I've been using it on my body & face, it's non-greasy, absorbs well, and really seems to offer very good sun protection. And I really appreciate the next day shipping on my past two orders, Amazon. Thanks for the great product & great service!
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Reviewed in the United States on April 20, 2026
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