---
product_id: 156262072
title: "Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black"
brand: "sennheiser"
price: "€ 0.26"
currency: EUR
in_stock: true
reviews_count: 7
url: https://www.desertcart.hr/products/156262072-sennheiser-hd-660-s-open-dynamic-lightweight-circumaural-headphones-low
store_origin: HR
region: Croatia
---

# Low impedance for effortless high-fidelity playback Open-back dynamic drivers for immersive sound Detachable cables with balanced 4.4mm Pentaconn plug Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black

**Brand:** sennheiser
**Price:** € 0.26
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game — hear what others are missing!

## Quick Answers

- **What is this?** Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black by sennheiser
- **How much does it cost?** € 0.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/156262072-sennheiser-hd-660-s-open-dynamic-lightweight-circumaural-headphones-low)

## Best For

- sennheiser enthusiasts

## Why This Product

- Trusted sennheiser brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable, stylish design:** Copper material and water-resistant build combine longevity with sleek, professional aesthetics.
- • **Effortless compatibility:** Low impedance ensures seamless pairing with a wide range of audio devices, from high-end DACs to portable players.
- • **Customizable connectivity:** Includes detachable cables and adapters (6.35mm & 4.4mm balanced) for versatile, tangle-free use.
- • **Audiophile-grade sound clarity:** Experience pristine, natural audio with the HD 660 S’s improved transducer design.
- • **Lightweight comfort for marathon listening:** At just 260 grams, these circumaural headphones deliver premium comfort without fatigue.

## Overview

The Sennheiser HD 660 S are premium open-back, dynamic circumaural headphones designed for audiophiles seeking exceptional sound clarity and comfort. Featuring low impedance for easy device compatibility, detachable cables including a balanced 4.4mm Pentaconn plug, and a lightweight copper build, these headphones deliver immersive, natural audio with durable, stylish construction.

## Description

Free delivery and returns on eligible orders of £20 or more. Buy Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black at desertcart UK.

Review: Superior sound but at a price - There were several reasons to add these "Sennheiser HD 660S Over-Ear Open Dynamic Headphones - Black" to a small but growing personal mini-collection. The packaging is essentially to expectations, card sleeve enclosing a solid box in which are the 'phones, cables and data booklet. The only issue is that the box is a VERY TIGHT fit in the sleeve and difficult to remove without damage to the sleeve, not that all will care about that! Once extracted, a thick lump of dense foam packaging within the box pushed its two sections outwards and the cause of the difficulty. Included cables are a 4.4mm balanced and a 3.5mm unbalanced, both 3m long and rubberized. There is an option for a balanced XLR cable should that ever be needed. As best known, coiled versions are not available as potential alternatives to those provided as they have a reputation for kinking. Rather than the gold-plated brass headphone adapter most manufacturers include, there is a short adapter cable ending in a plastic-bodied socket. The connectors linking with the earpieces are not obviously keyed other than being labelled L and R, respectively, on the outside. The earpieces lack any obvious labelling for side (L or R). The cable connectors are marked but the lettering is small, black on black and barely rise beyond the general surface. The key is the gold S logo on each unit which should be oriented to the rear. The headband is the expected thick, broad band with deep velour-covered foam pads to either side of centre with sufficient adjustment for different head sizes, hairstyles etc. The ear-pads are also velour-covered which should be longer-lasting than the 'leather' found on lesser models and that usually need replacing within two years; these should last several years. Both sets of padding are sufficiently thick and comfortable. While immediately comfortable to wear, and likely to be just as comfortable after several hours, they are quite lightweight as plastics are used extensively, a significant surprise at the price paid. Were construction of carbon-fibre, glass-fibre or a honeycomb composite as used in the aviation industry (subject to suitability); the weight would be similar but perception of construction standards would probably be higher. Regardless, construction is to an adequately high standard although a hard case may be desirable should they need to be transported between home and studio or between venues; the 'phones are not designed to fold so is likely to be large and preferably internally sculpted to fit. At home, a suitable headphone stand (a polystyrene head?) could be a worthwhile addition. Designed for audiophile, professional studio or monitoring purposes the HD660s' perfectly flat mid-range and lower-treble - the portion of the audio range most relevant when monitoring or producing - is outstanding and probably exceeds almost everything within their price range. Overall frequency response is quoted as 9 Hz to 41500 kHz but without a specified variation at the extremes. Sub-bass performance out-of-the box is less impressive. The HD660s generally requires a headphone amplifier and that is how it will be later used; a burn-in period using a radio's headphone socket as a source will follow almost immediately with the 'phones buried under a pile of cushions to deaden the leaking sound over the minimum of two or three days' continuous play it involves - it isn't necessary to listen, especially if in a bedroom at night! The amplifier owned offers two functions dedicated to an older Sennheiser model that is now manufactured by another company and rebranded. That model has widely recognized performance issues that the amp can resolve. Although not specifically intended to support them, it was suggested by an independent professional audio lab that there is a shortlist of Sennheiser models that each benefit when partnered with the amp; the HD660s is one, supported not equally but even better! That information was previously unknown. Having purchased the amp to use with other owned headphones, it was initially thought not to be fully functional as its benefits were not audible with either. Questions were raised with the manufacturer and some clarification followed but additional questions were raised but not yet resolved. Once support for the HD660s was known via another source, their purchase was initiated. Personal curiosity about the amp's benefits needed to be satisfied and results for both functions are highly favourable, very evident even for older ears. With both working in consort, low-bass performance is improved, the sound rounder and more characterful helped by a slight rise and smoothness in the high-treble area while the expanded sound-stage is dramatic having eliminated the sense from the HD660s alone that performers who previously appeared to essentially be shoulder-to-shoulder were now spread across a wide area with a well-defined left, right and centre, not each in a single location but with individual isolation. After burn-in, performance should be smoother and more impressive. As a headphone amplifier is almost indispensable, purchasers should undertake their own research to ascertain which best meets their budget and usage requirements as prices range from sub-£100 to low-thousands! Personal choice, initially incidental and with no expectation that the HD660s were soon to be purchased, may have resulted in the perfect partner without breaking the bank! Without doubt, these are the best headphones ever heard although not the first to be of a professional audio standard. There was unsatisfied expectation that there may be an individual performance print-out of the actual unit's audio spectrum, distortion levels etc to demonstrate just how closely the two ear units matched; a similar chart was provided with professional 'phones purchased in the '70s and binned when its gel-filled, non-replaceable ear-cushions solidified over several months one summer.
Review: Good, but not the best for that price range - Overall these are a solid choice if great sound (with some eq), lightweightness, tight fit, balanced connection and strong mids are your thing. They sound great with every genre. They sound nice and loud enough directly without an amp from my Samsung Galaxy S10, but with an amp they really shine. They are very open, which is very nice when using them in a (video)call. Listening to your own voice almost sound natural. That said I also bought recently a pair of Beyerdynamic DT1990pro for basically the same price and apart from the points already mentioned the Beyers are better in every aspect: Better build, better comfort, better accessories (extra pair of ear pads and carry case), better cables. Better sound with more detail, crispier highs and very detailed bass. And yes their biggest problem/flaw is that harsh 8khz spike. So they also need to have some eq. With a strong treble lift on the HD660s both headphone can almost sound identical, but the DT1990pro still has better soundstage, resolution and presence. I let my wife decide which one she wants, but after an initial impression, she also wants the DT1990pro. Just to be clear, the differences are marginally, both headphones are amazing and better than anything we had at hand before like Bose QC15 and QC35II and Beyerdynamics DT 770 pro 80ohm. The QC35II are still my no 1 choice for outdoor and overall comfort, but listening to music on these is hard after experiencing the HD660S or DT1990pro. It's like driving a VW Golf and then Mercedes C-Class ... Update after a month of use: The initial quite strong clamping force is not so much an issue any more and I can almost forget wearing them. I would say they became more comfy than the dt1990pro, especially being lighter and more "airy". BUT: last week I upgraded to the HifiMan Arya Stealth, which are way better than both of them in sound and comfort. Build quality and cable is still better on the dt1990pro. But if you planning to use headphones as your primary sound source the almost 1000 pound price difference is worth it. The sound is drastically better, especially compared to the hd660s and the fact the that earcups are so big and deep that they don't touch the ears at all is amazing. These are truly S-Class ...

## Features

- Słuchawki Sennheiser HD 660s

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07WX541ZJ |
| Age Range Description | Adult |
| Audio Driver Size | 40 Millimetres |
| Audio Driver Type | Dynamic Driver |
| Battery Charge Time | 5 32nds |
| Box Contents | HD 660 S, cable with 6.35 mm plug, cable with 4.4 mm Pentaconn plug (balanced), adapter 6.35 to 3.5 mm, instructions, storage box |
| Brand Name | Sennheiser |
| Cable Features | Detachable |
| Carrying Case Color | Black |
| Carrying Case Material | Plastic |
| Colour | black |
| Compatible Devices | Audio Devices |
| Control Method | Remote |
| Control Type | App Control |
| Controller Type | wired |
| Customer Package Type | Standard packaging |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,144) |
| EU Spare Part Availability Duration | 2 Years |
| Earpiece Shape | Over Ear |
| Enclosure Material | Copper |
| Frequency Range | 20 Hz - 20,000 Hz |
| Global Trade Identification Number | 04044155249569 |
| Headphone Form Factor | Over Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | Open Ear |
| Impedance | 150 Ohms |
| Is Autographed | No |
| Is Electric | Yes |
| Item Weight | 260 Grams |
| Manufacturer | Sennheiser |
| Model Name | HD 660 S |
| Model Number | HD 660 S |
| Network Connectivity Technology | Wired |
| Noise Control | None |
| Number of Items | 1 |
| Product Features | Detachable Cable, Water Resistant |
| Series Number | 508826 |
| Specific Uses For Product | Multimedia |
| Style Name | Single |
| Subject Character | no subject character |
| Theme | Music |
| Unit Count | 1.0 Count |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | Wi-Fi |

## Product Details

- **Brand:** Sennheiser
- **Colour:** black
- **Connectivity technology:** Wired
- **Ear placement:** Open Ear
- **Form factor:** Over Ear
- **Headphone jack:** 3.5 mm Jack
- **Impedance:** 150 Ohms
- **Model name:** HD 660 S
- **Noise control:** None
- **Wireless communication technology:** Wi-Fi

## Images

![Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black - Image 1](https://m.media-amazon.com/images/I/71tk+vMP4DL.jpg)
![Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black - Image 2](https://m.media-amazon.com/images/I/61nMRbjF7tL.jpg)
![Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black - Image 3](https://m.media-amazon.com/images/I/61J5hPVDvYL.jpg)

## Questions & Answers

**Q: I have had these for a few months and the ear cup is already becoming worn. They are used daily but handled with care. Can the ear cups be replaced?**
A: There are replacement earpads for both the HD660 S and its predecessor the HD650 available from the makers Sennheiser, the replacement is straightforward and videos exist on the internet for those uncertain as to how to do it.  I found them easily here on Amazon but I imagine there are many sources.

**Q: Are these good for baroque music? do they need an amp? shall i get this model or hd 600?**
A: The HD 660S are excellent headphones and they will play any music well.  Great allrounder open, dynamic and very detailed so make sure you match them up will a decent system as they will expose a poor setup.
They need a week or so to burn in so don't be disappointed when they show up and they are a bit light weight.  They will sound great after a few weeks. They are also very comfortable to wear so you can't really go wrong at the price.  Highly recommended.

**Q: Do these have good bass extension, including sub bass (like the open back audio-technica ath-r70x)?**
A: These are monitoring headphones meaning they will have a flat response as we want this to sound as natural as possible however these start from 10Hz meaning it will be able to handle lower end frequencies well.

**Q: If i am using with a hi res dap, is headphone amp still required to drive these to get best out? and would dragonfly cobalt suit?**
A: Do you mean DAC? ? The HD660s have a fairly reasonable impedance at 150 ohms but still require a headphone amp to give them more control.
The Dragonfly cobolt is a fairly good portable amp/Dac but the build quality isn’t great in some reviews I’ve heard. I use mine with a Topping D50s Dac & a JDS Labs Atom headphone amp. It isn’t portable but sounds superb for the price point

## Customer Reviews

### ⭐⭐⭐⭐⭐ Superior sound but at a price
*by L***R on 2 March 2021*

There were several reasons to add these "Sennheiser HD 660S Over-Ear Open Dynamic Headphones - Black" to a small but growing personal mini-collection. The packaging is essentially to expectations, card sleeve enclosing a solid box in which are the 'phones, cables and data booklet. The only issue is that the box is a VERY TIGHT fit in the sleeve and difficult to remove without damage to the sleeve, not that all will care about that! Once extracted, a thick lump of dense foam packaging within the box pushed its two sections outwards and the cause of the difficulty. Included cables are a 4.4mm balanced and a 3.5mm unbalanced, both 3m long and rubberized. There is an option for a balanced XLR cable should that ever be needed. As best known, coiled versions are not available as potential alternatives to those provided as they have a reputation for kinking. Rather than the gold-plated brass headphone adapter most manufacturers include, there is a short adapter cable ending in a plastic-bodied socket. The connectors linking with the earpieces are not obviously keyed other than being labelled L and R, respectively, on the outside. The earpieces lack any obvious labelling for side (L or R). The cable connectors are marked but the lettering is small, black on black and barely rise beyond the general surface. The key is the gold S logo on each unit which should be oriented to the rear. The headband is the expected thick, broad band with deep velour-covered foam pads to either side of centre with sufficient adjustment for different head sizes, hairstyles etc. The ear-pads are also velour-covered which should be longer-lasting than the 'leather' found on lesser models and that usually need replacing within two years; these should last several years. Both sets of padding are sufficiently thick and comfortable. While immediately comfortable to wear, and likely to be just as comfortable after several hours, they are quite lightweight as plastics are used extensively, a significant surprise at the price paid. Were construction of carbon-fibre, glass-fibre or a honeycomb composite as used in the aviation industry (subject to suitability); the weight would be similar but perception of construction standards would probably be higher. Regardless, construction is to an adequately high standard although a hard case may be desirable should they need to be transported between home and studio or between venues; the 'phones are not designed to fold so is likely to be large and preferably internally sculpted to fit. At home, a suitable headphone stand (a polystyrene head?) could be a worthwhile addition. Designed for audiophile, professional studio or monitoring purposes the HD660s' perfectly flat mid-range and lower-treble - the portion of the audio range most relevant when monitoring or producing - is outstanding and probably exceeds almost everything within their price range. Overall frequency response is quoted as 9 Hz to 41500 kHz but without a specified variation at the extremes. Sub-bass performance out-of-the box is less impressive. The HD660s generally requires a headphone amplifier and that is how it will be later used; a burn-in period using a radio's headphone socket as a source will follow almost immediately with the 'phones buried under a pile of cushions to deaden the leaking sound over the minimum of two or three days' continuous play it involves - it isn't necessary to listen, especially if in a bedroom at night! The amplifier owned offers two functions dedicated to an older Sennheiser model that is now manufactured by another company and rebranded. That model has widely recognized performance issues that the amp can resolve. Although not specifically intended to support them, it was suggested by an independent professional audio lab that there is a shortlist of Sennheiser models that each benefit when partnered with the amp; the HD660s is one, supported not equally but even better! That information was previously unknown. Having purchased the amp to use with other owned headphones, it was initially thought not to be fully functional as its benefits were not audible with either. Questions were raised with the manufacturer and some clarification followed but additional questions were raised but not yet resolved. Once support for the HD660s was known via another source, their purchase was initiated. Personal curiosity about the amp's benefits needed to be satisfied and results for both functions are highly favourable, very evident even for older ears. With both working in consort, low-bass performance is improved, the sound rounder and more characterful helped by a slight rise and smoothness in the high-treble area while the expanded sound-stage is dramatic having eliminated the sense from the HD660s alone that performers who previously appeared to essentially be shoulder-to-shoulder were now spread across a wide area with a well-defined left, right and centre, not each in a single location but with individual isolation. After burn-in, performance should be smoother and more impressive. As a headphone amplifier is almost indispensable, purchasers should undertake their own research to ascertain which best meets their budget and usage requirements as prices range from sub-£100 to low-thousands! Personal choice, initially incidental and with no expectation that the HD660s were soon to be purchased, may have resulted in the perfect partner without breaking the bank! Without doubt, these are the best headphones ever heard although not the first to be of a professional audio standard. There was unsatisfied expectation that there may be an individual performance print-out of the actual unit's audio spectrum, distortion levels etc to demonstrate just how closely the two ear units matched; a similar chart was provided with professional 'phones purchased in the '70s and binned when its gel-filled, non-replaceable ear-cushions solidified over several months one summer.

### ⭐⭐⭐⭐⭐ Good, but not the best for that price range
*by S***H on 20 January 2022*

Overall these are a solid choice if great sound (with some eq), lightweightness, tight fit, balanced connection and strong mids are your thing. They sound great with every genre. They sound nice and loud enough directly without an amp from my Samsung Galaxy S10, but with an amp they really shine. They are very open, which is very nice when using them in a (video)call. Listening to your own voice almost sound natural. That said I also bought recently a pair of Beyerdynamic DT1990pro for basically the same price and apart from the points already mentioned the Beyers are better in every aspect: Better build, better comfort, better accessories (extra pair of ear pads and carry case), better cables. Better sound with more detail, crispier highs and very detailed bass. And yes their biggest problem/flaw is that harsh 8khz spike. So they also need to have some eq. With a strong treble lift on the HD660s both headphone can almost sound identical, but the DT1990pro still has better soundstage, resolution and presence. I let my wife decide which one she wants, but after an initial impression, she also wants the DT1990pro. Just to be clear, the differences are marginally, both headphones are amazing and better than anything we had at hand before like Bose QC15 and QC35II and Beyerdynamics DT 770 pro 80ohm. The QC35II are still my no 1 choice for outdoor and overall comfort, but listening to music on these is hard after experiencing the HD660S or DT1990pro. It's like driving a VW Golf and then Mercedes C-Class ... Update after a month of use: The initial quite strong clamping force is not so much an issue any more and I can almost forget wearing them. I would say they became more comfy than the dt1990pro, especially being lighter and more "airy". BUT: last week I upgraded to the HifiMan Arya Stealth, which are way better than both of them in sound and comfort. Build quality and cable is still better on the dt1990pro. But if you planning to use headphones as your primary sound source the almost 1000 pound price difference is worth it. The sound is drastically better, especially compared to the hd660s and the fact the that earcups are so big and deep that they don't touch the ears at all is amazing. These are truly S-Class ...

### ⭐⭐⭐⭐⭐ Review
*by J***L on 18 August 2023*

These sennheiser headphones deliver some of the best audio quality i've ever heard. Bass is practically non-existant however so I use an equalizer for that. They're very comfortable.

## Frequently Bought Together

- Sennheiser HD 660 S Open Headphones
- Replacement Audio Upgrade Cable for Sennheiser HD650, HD600, HD580, HD58X, HD660S, Massdrop HD6XX Headphones 1.2meters/4feet

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/156262072-sennheiser-hd-660-s-open-dynamic-lightweight-circumaural-headphones-low](https://www.desertcart.hr/products/156262072-sennheiser-hd-660-s-open-dynamic-lightweight-circumaural-headphones-low)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-04-23*