SKU: 20111700814

Sennheiser HD 660S2 Open Back Headphones

Sale price$179.55 Regular price$199.50
Save 10%

Pay in installments of $49.88 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Sennheiser HD 660S2 Open Back HeadphonesSennheiser HD 660S2 Open Back Headphones The HD 660S2 is the newest version of Sennheiser's legendary "HD 600" series. They feature the same iconic design as their predecessors but with some noticeable sonic tweaks, in particular to enhance the lower bass frequencies with the 660S2s now dropping down to 70Hz. Musical Precision Like their predecessors, the HD 660S2 headphones are crafted for the discerning listener. Each speaker is hand selected and

Sennheiser HD 660S2 Open Back Headphones

The HD 660S2 is the newest version of Sennheiser's legendary "HD 600" series. They feature the same iconic design as their predecessors but with some noticeable sonic tweaks, in particular to enhance the lower bass frequencies with the 660S2’s now dropping down to 70Hz.

Musical Precision

Like their predecessors, the HD 660S2 headphones are crafted for the discerning listener. Each speaker is hand-selected and meticulously paired to ensure consistent sound quality across both channels. The precision-engineered stainless-steel diaphragms deliver an incredibly realistic, true-to-life audio experience.

Open-Back Design for Expansive Sound

With an open-back design, the HD 660S2 headphones provide a wide, more natural, airy sound, getting you as close to a live performance as possible.

Balanced Input Capability

Equipped with both balanced and unbalanced cables, the HD 660S2 optimizes the performance of high-quality headphone amplifiers and audio players with balanced outputs. Balanced cables reduce interference, preserving the purity of the sound. The standard cable features a 6.35mm plug, with a 3.5mm adapter included for convenience.

Built for Comfort

When audio quality is this exceptional, extended listening sessions are inevitable. The HD 660S2 ensures lasting comfort with its ergonomic, elliptical ear cups that naturally conform to your ears. The breathable, soft earpads enhance comfort without becoming sticky or uncomfortable during long use.

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: 20111700814

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 25 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
Kelly
Port Orchard, US
★★★★★ 5
Boston terrier
Size: 6 Inch, Color: Red
My bostie loves to grab the tabs and toss this around! Well made. Can be chewed on and it holds up. Fun toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
J
Verified Purchase
Jill Metzger
Massapequa, US
★★★★★ 5
Wonderful
Size: 9 Inch, Color: Red
Just bought my second one for my German shepherd. 1st one I bought a year ago. She managed to pop it within a few days. She still was able to play with it by grabbing ahold of the straps. Takes it everywhere. We call it her tether ball. Should've seen her when we got the new one out of the box. Hasn't left it alone since.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
M
Verified Purchase
maggie medina
Charlottesville, US
★★★★★ 4
Keeps him busy. Puppy proof
Size: 6 Inch, Color: Independence Day
Thankfully I bought 2. One of the pumps broke as I was trying to blow up. That is the reason i did not give then 5 stats. This is a great toy for my puppy. Keeps him entertained and is pretty sturdy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 5
Great for dog self play
Size: 6 Inch, Color: Red, Size: 6 Inch, Color: Red
So much fun for my puppy. Easy to grab and throw for him to play alone. Durable for a medium dog. This is his favorite toy. I also bought one for my friends cattle dog puppy who went bonkers with it. Yet her dog liked to chew the tags off. So I wouldn’t recommend for chewers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
D
Verified Purchase
Dawn L
Cuba, US
★★★★★ 5
Fun to fetch
Size: 5 Inch, Color: Red, Size: 5 Inch, Color: Red
Perfect size for my 1 yr old Cavapoo that is ball obsessed. This ball is fun to toss around in the yard to exercise and wear out my energetic boy. Perfect for after my work day when I don’t have the energy to match his energy level. He gets to run and chase and I can enjoy his playtime too. Overall the ball is durable and I have confidence it will last for a very long time. We have 2 sizes, small and medium, for my 30 pound athletic pup. He enjoys both equally.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026

recommand products