HD 660S 2 - Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil

Shipped and sold by Sennheiser Consumer Audio
4.7 (22)
$599.95
50/mo.* suggested payments for 12-months totaling $599.95 with Macy's Card. *
OR
Color:Black

Product Details

Web ID: 15883557

From thundering timpani, to the melodic sound of a guitar, the impressive singing voice of your favorite artist, or the beat of electronic dance music, nothing creates drama like powerful bass. Ideal for music lovers, the non-fatiguing, high-end HD 660S2 now delivers even more impact and emotion.

  • Product Features

    • Natural, relaxed, high-fidelity sound with extra sub bass: Ultra-light aluminum voice coil with 300-ohm impedance for excellent impulse response and an intimate sound with great timbre
    • Airflow-optimised 42mm high-performance transducers: Improved ventilation due to a uniquely powerful vented magnet system for minimal distortion and air displacement control through steel mesh damping
    • Double the sound pressure at the lowest octaves: You can feel the lowest note on the piano (27.5 Hz) or the kick of the bass drum (45-60 Hz) as if you were there, at the recording studio
    • Exceptional comfort and build quality: The open-back design offers exceptional breathability and the plush ear cushions deliver maximum comfort - for long listening sessions
    • Outstanding quality designed in Germany, made in Ireland: With a frequency response of 8 Hz - 41,500 Hz and detachable, long cables for comfortable desktop use
    • Wipe clean
    • Imported

  • Product Dimensions

    • 9.53 x 7.17 x 3.94 inches
    • 1.41

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Ratings & Reviews

4.7/5

22 star ratings, 21 reviews

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24 days ago
from Pismo Beach CA

Way better than expected

I bought the 660S2 HP expecting mid level performance in this day and age of 3K to 6K top of the line HP. Was very surprised when I A/B'd this set with Hifiman Susvaras. Bass response was very good; attack and decay was better in the Sennheisers vs the Susvara. The Sennheisers were considerably warmer sounding than the Susvara, but in a musical way, not muddy or smearing. The Susvara has a bit more "air" and inner detail, but not 6K worth. I did not experience a broad sound field with either HP. Subtle detail like the bells in John Klemmers Touch were a bit more evident in the Susvara but still very much present in the 660s. Driving the Sennheisers was considerably easier than the Susvaras as has been noted elsewhere, but cabling is less critical with the more sensitive Sennheiser's higher 300 ohm impedance; wire gage makes less of a difference if you have longer wire runs as opposed to the low sensitivity 60 ohm Susvara. I found I had to crank my class A HP amp up full volume with the Susvara leaving little headroom. The Sennheisers were easily driven with that amp with plenty of headroom. I generally I was very surprised at how good the Sennhesiers are, and they are probably 80 to 90% of the performance of the Hifiman product, some may find them overall better.

Recommends this product

Customer review from Sennheiser

2 months ago
from NJ

desert island headphones indeed

incredible feel pure sound I can hear all the different parts to the music comfy lackluster packaging - but I bought headphones, I don’t care about how they’re stored

Recommends this product

Customer review from Sennheiser

3 months ago
from Minneapolis, MN

Sennheiser knows what they are doing, Bravo!

Solid construction. you can feel the quality. Don't let the plastic deter you from buying these. The clamping force is a little much, but I have a large head. I used my headphone holder, with a couple of folded cloths, to widen the clamping and it now fits perfect. You can wear these all day with no ear fatigue or head pain. The sound is amazing. The sub bass is present without being muddy. I EQ with my HD600 but the 660S2 does not need it. They pair will with my Schiit Valhalla 2 tube amp. Not only is this an upgrade to the HD600 (for me), but the 660S2 stands on its own as a great, open-back headphone

Recommends this product

Customer review from Sennheiser

5 months ago

Awesome Buy

Bought this as an early Christmas gift for myself and was not disappointed by it one bit. Definitely worth the buy.

Customer review from Sennheiser

5 months ago
from Baltimore, MD

Novice+ Audiophile Experience

I just purchased my HD660S2 on Black Friday, upgrading from Sennheiser PXC 550 II. I'm a lifetime music lover that just in recent years got interested in hires lossless music. The 660s2 along with Questyle M15i DAC using 4.4mm balanced output is a tremendous sound quality difference with Qobuz music. I can hear a lot of little nuances in the music that wasn't noticeable previously. It was a great investment that I had on my radar for a few years.

Recommends this product

Customer review from Sennheiser

7 months ago
from Washington

Break in is not an option

Pushing them with a McIntosh 7200 and honestly my first hour was pure buyer’s remorse. After 10 hours not so muffled but hoping for more clarity especially in the treble range. Bass is not the problem. So hopefully more time may help but we’ll see. You’ll need an extension if you’re going to be couch lounging. What’s with the useless black bag? Really?

Recommends this product

Customer review from Sennheiser

8 months ago

Great look and great sound 👍

Look great with outstanding sound ,i love it…😁👍👍

Customer review from Sennheiser

1 year ago

Best one so far

I went to these from some DT 990 Pro's 250ohm. and lemme tell you something. its been about 2 months but im still sold that these will be my forever headphones. I have never felt that way about headphones. They sound FULL, very full. Super detailed and clean, and pretty good sub bass. I have them paired with a FiiO k5 pro

Customer review from Sennheiser