SKU: 38163149676

Sennheiser HD 660S2 Open-Back Audiophile Wired Headphones - Black

Sale price$305.98 Regular price$339.98
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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16

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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:
  1. 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
SKU: 38163149676

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Daniel C
Natrona Heights, US
★★★★★ 5
New Favorite Work Shoe
Size: 9.5, Color: Black/Ivory
These Cole Haan Grand Crosscourt Daily shoes have quickly become my new favorite work shoes. They’re incredibly comfortable right out of the box, with just the right amount of cushioning and support to get through long days on my feet. I love that they look sleek and professional while still feeling casual enough to wear anywhere. The build quality is top-notch—durable materials and solid construction that make them feel like they’ll last a long time. Overall, these shoes strike the perfect balance between comfort, style, and practicality. I can honestly say I look forward to wearing them every day. Highly recommend for anyone who spends a lot of time on their feet but doesn’t want to sacrifice style.
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Reviewed in the United States on February 9, 2026
E
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Edward Diaz
Battle Creek, US
★★★★★ 5
Well Made for price and style
Size: 10.5, Color: Black/Ivory
Great fit and very flexible. I also recommend buying shoe savers when purchasing this product. To help with toes wrinkles. The pair itself is stylish and very comfortable. Any purchase of this product will be greatly satisfied.
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Reviewed in the United States on April 16, 2026
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Pierre
Carnegie, US
★★★★★ 5
Nice shoes
Size: 11.5, Color: Black/Ivory
The are very comfortable, and look great.
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Reviewed in the United States on April 8, 2026
J
Verified Purchase
Jeffrey Clemons
Phoenix, US
★★★★★ 4
Comfortable
Size: 9.5, Color: British Tan/Ivory
Great foot support. Wore all day with not foot or back pain.
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Reviewed in the United States on April 29, 2026
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Walter R Moore
Phoenix, US
★★★★★ 5
Quality at affordable prices.
Size: 11.5, Color: British Tan/Ivory
Best old guy shoes. They look great and have support for feet. You don't want cheap department shoes. You will pay for that in your later years.
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Reviewed in the United States on April 11, 2026

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