---
product_id: 348193650
title: "HD 660 S Open Headphones"
brand: "sennheiser"
price: "238.88 OMR"
currency: OMR
in_stock: true
reviews_count: 5
category: "Sennheiser"
url: https://www.desertcart.com.om/products/348193650-hd-660-s-open-headphones
store_origin: OM
region: Oman
---

# 150Ω impedance for versatile use 40mm dynamic drivers Detachable OFC copper cables HD 660 S Open Headphones

**Brand:** sennheiser
**Price:** 238.88 OMR
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game — hear every detail, feel every beat.

## Quick Answers

- **What is this?** HD 660 S Open Headphones by sennheiser
- **How much does it cost?** 238.88 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/348193650-hd-660-s-open-headphones)

## 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

- • **Precision engineering:** Hand-selected drivers matched within 1 dB for consistent, accurate stereo imaging.
- • **Effortless versatility:** 150Ω impedance lets you plug into both mobile Hi-Res players and stationary setups without compromise.
- • **Audiophile-grade clarity:** Experience pristine vocals and instrumentals with ultra-low distortion drivers.
- • **Future-proof connectivity:** Robust, tangle-free detachable cables crafted from highly conductive OFC copper minimize noise and maximize durability.
- • **Tailored comfort for marathon sessions:** Lightweight design with aluminum frame and pads that mold to your head over time.

## Overview

The Sennheiser HD 660 S are open-back, dynamic headphones designed for discerning audiophiles seeking exceptional sound fidelity. Featuring 40mm drivers with ultra-low harmonic distortion, 150Ω impedance for flexible device compatibility, and hand-matched drivers for precise stereo accuracy, these headphones deliver a natural, balanced sound signature. Their lightweight aluminum frame and break-in comfort make them ideal for extended listening, while detachable, high-quality OFC copper cables ensure durability and minimal noise interference.

## Description

Buy Sennheiser HD 660 S Open Headphones online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Needs an equalizer to make the bass more punchy - 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.
Review: A Serious Audiophile collectible. What a beauty! - I'm not an experienced reviewer, and still fairly inexperienced with this tier of headphones. But maybe my experience with these headphones as an average audio enthusiast might help some likeminded individuals decide if these are worth checking out or not. The setup and sources I use Primary Source/DAC/Amp: Fiio X5 mkiii Music sources: Spotify Premium, HiFi, Flac, 320 kbps Build quality No complaints here. Even though the exterior is mostly plastic, the frame of the headband is made from aluminum, and does not feel cheap or vulnerable at all. The plastic allows these headphones to be very light, which contributes greatly to the comfort. The HD 6-- series have been known to endure for decades when properly taken care of, and I have not found any reason to doubt that. Comfort This might be the most significant selling point for me. They are definitely not very comfortable right out of the box, since the clamping force is initially quite prominent. Also the pads are fairly stiff, which in combination with the clamping force, puts a fair bit of strain on the arms of my glasses. They still were more comfortable than many headphones I've owned before though. As time progressed, the headband loosened up, and the pads had worn in, forming to the shape of my head. Since then, they haven't been uncomfortable at all anymore, and I've been able to keep them on for endless hours without feeling strained. Like many others have said, you just forget that you're wearing headphones after a while. Power requirements They are rated at a nominal impedance of 150 ohms, and are advertised to not require a dedicated amp for good results. While I do agree that these sound absolutely fine with my iphone X and galaxy s9+, but i primarily use a Fiio X5 mkiii player and that has definitely shown a worthwhile improvement. Not only to achieve satisfactory levels of volume, but also to remain free from distortion at much higher volume levels than my on-board audio. It just sounds more effortless and linear overall. Sound Bass The bass on these is tight, quick and punchy. Without EQ, the amount of bass is leaning more towards being bass-light, which isn't optimal for bass-heavy genres like modern hip-hop and various electronic subgenres. There is still a decent amount of mid-upper bass, which is sufficient to nicely complement instrumental/vocal focused genres like rock, jazz, soul, classical etc. With EQ, the bass can be elevated quite a lot without sounding distorted or awfully off. Also, with tracks that have a lot of loud bass going on, the bass does start to audibly struggle quite a bit, and can at times sound a bit distorted. Overall, it's not capable of being a bass-cannon, but for my likings, it's capable enough. Midrange This is regarded to be the main reason why the 6-- series has been so popular for over 20 years, and rightfully so. Vocals sound impressively clear and forward, definitely the most realistic representation of vocals I have heard on any headphone. Even realistic to a degree where you can almost feel the breath of the singer. Intrumentals are also presented with magnificent detail and separation. Opposed to the HD 600 and 650, these don't sound veiled at all. Vocals are very much in-your-face, instrumentals right behind it, without feeling like anything overshadows anything. Very impressive! Treble I am quite treble-sensitive, which contributed greatly to why I like the 660 S more than the 600 or 650. To my ears, the treble is already leaning towards the brighter side, but the EQ conveniently smoothens it out just enough to hit the sweet spot for me. The slightly recessed treble does translate into a mild loss of fine details and sparkle in that area, but for my own listening enjoyment, this tradeoff is worth it for me. Soundstage The soundstage on the HD 660 S is decent, but not impressive. It's still wider than any closed back headphones I have tried, and there is enough width to get a proper sense of separation and distance. It sounds a bit wider than the 600/650 to my ears, but this might be because there appears to be a bit more air in between different sounds. On the 600/650, adjacent sounds can sound a bit more like they are transitioning into one another, while the 660 S sounds like there is much less of a transition, and more air in between sounds. Final verdict The HD 660 S does a lot of things exceptionally well, and has not revealed any major flaws. The combination of comfort, the beautifully balanced sound signature that never fatigues, the resolving capabilities, the flexibility to EQ this to a wide variety of different sound signatures all make this a headphone that is very difficult to criticize.

## Features

- Reference-class open dynamic headphones for music enthusiasts: crisp bass, excellent mid-frequency response, and a natural treble for an exceptional sound experience
- New improved transducer design for very low harmonic distortion: enhanced control of the diaphragm movements and light voice coils ensure the highest impulse fidelity
- Hand-selected headphone drivers with precise left and right matching tolerances ( 1 dB) for consistent accuracy
- 150 ohms nominal impedance to allow direct connection to both stationary audio sources and mobile HiRes players
- Robust para-aramid reinforced, detachable cables made from highly conductive OFC copper, with very low handling noise

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07WX541ZJ |
| Additional Features | Tangle Free Cord |
| Age Range Description | Adult |
| Antenna Location | Music Listening |
| Audio Driver Size | 40 Millimeters |
| Audio Driver Type | Dynamic Driver |
| Battery Charge Time | 5 32nds |
| Best Sellers Rank | #56,746 in Electronics ( See Top 100 in Electronics ) #1,041 in Over-Ear Headphones |
| Brand | Sennheiser |
| Built-In Media | HD 660 S, Cable with 6.35 mm plug, Cable with 4,4 mm Pentaconn plug (balanced), Adaptor 6.35 to 3.5 mm, Manual, Storage box |
| Cable Features | Detachable |
| Carrying Case Color | Black |
| Carrying Case Material | Plastic |
| Color | Black |
| Colour | Black |
| Compatible Devices | Audio Devices |
| Connectivity Technology | Wired |
| Control Method | Remote |
| Control Type | Noise Control |
| Controller Type | wired |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 out of 5 stars 1,133 Reviews |
| Ear placement | Open Ear |
| Earpiece Shape | Over Ear |
| Enclosure Material | Plastic |
| Form factor | Over Ear |
| Frequency Range | 20 Hz - 20,000 Hz |
| Global Trade Identification Number | 04044155249569 |
| Headphone Folding Features | Over Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | Open Ear |
| Impedance | 150 Ohms |
| Is Autographed | No |
| Is Electric | Yes |
| Item Type Name | open, dynamic headphones for audiophiles |
| Item Weight | 260 Grams |
| Manufacturer | Sennheiser |
| Model Name | HD 660 S |
| Model Number | HD 660 S |
| Noise Control | None |
| Noise control | None |
| Number of Items | 1 |
| Series Number | 508826 |
| Specific Uses For Product | Dry Sanding, Personal, Business, Amateur |
| Style Name | Single |
| Subject Character | no subject character |
| Theme | No Theme |
| Unit Count | 1 Count |
| Warranty Description | 1 |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology | Wi-Fi |

## Product Details

- **Brand:** Sennheiser
- **Colour:** Black
- **Ear placement:** Open Ear
- **Form factor:** Over Ear
- **Impedance:** 150 Ohm

## Images

![HD 660 S Open Headphones - Image 1](https://m.media-amazon.com/images/I/71tk+vMP4DL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Needs an equalizer to make the bass more punchy
*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.

### ⭐⭐⭐⭐⭐ A Serious Audiophile collectible. What a beauty!
*by V***A on 9 June 2020*

I'm not an experienced reviewer, and still fairly inexperienced with this tier of headphones. But maybe my experience with these headphones as an average audio enthusiast might help some likeminded individuals decide if these are worth checking out or not. The setup and sources I use Primary Source/DAC/Amp: Fiio X5 mkiii Music sources: Spotify Premium, HiFi, Flac, 320 kbps Build quality No complaints here. Even though the exterior is mostly plastic, the frame of the headband is made from aluminum, and does not feel cheap or vulnerable at all. The plastic allows these headphones to be very light, which contributes greatly to the comfort. The HD 6-- series have been known to endure for decades when properly taken care of, and I have not found any reason to doubt that. Comfort This might be the most significant selling point for me. They are definitely not very comfortable right out of the box, since the clamping force is initially quite prominent. Also the pads are fairly stiff, which in combination with the clamping force, puts a fair bit of strain on the arms of my glasses. They still were more comfortable than many headphones I've owned before though. As time progressed, the headband loosened up, and the pads had worn in, forming to the shape of my head. Since then, they haven't been uncomfortable at all anymore, and I've been able to keep them on for endless hours without feeling strained. Like many others have said, you just forget that you're wearing headphones after a while. Power requirements They are rated at a nominal impedance of 150 ohms, and are advertised to not require a dedicated amp for good results. While I do agree that these sound absolutely fine with my iphone X and galaxy s9+, but i primarily use a Fiio X5 mkiii player and that has definitely shown a worthwhile improvement. Not only to achieve satisfactory levels of volume, but also to remain free from distortion at much higher volume levels than my on-board audio. It just sounds more effortless and linear overall. Sound Bass The bass on these is tight, quick and punchy. Without EQ, the amount of bass is leaning more towards being bass-light, which isn't optimal for bass-heavy genres like modern hip-hop and various electronic subgenres. There is still a decent amount of mid-upper bass, which is sufficient to nicely complement instrumental/vocal focused genres like rock, jazz, soul, classical etc. With EQ, the bass can be elevated quite a lot without sounding distorted or awfully off. Also, with tracks that have a lot of loud bass going on, the bass does start to audibly struggle quite a bit, and can at times sound a bit distorted. Overall, it's not capable of being a bass-cannon, but for my likings, it's capable enough. Midrange This is regarded to be the main reason why the 6-- series has been so popular for over 20 years, and rightfully so. Vocals sound impressively clear and forward, definitely the most realistic representation of vocals I have heard on any headphone. Even realistic to a degree where you can almost feel the breath of the singer. Intrumentals are also presented with magnificent detail and separation. Opposed to the HD 600 and 650, these don't sound veiled at all. Vocals are very much in-your-face, instrumentals right behind it, without feeling like anything overshadows anything. Very impressive! Treble I am quite treble-sensitive, which contributed greatly to why I like the 660 S more than the 600 or 650. To my ears, the treble is already leaning towards the brighter side, but the EQ conveniently smoothens it out just enough to hit the sweet spot for me. The slightly recessed treble does translate into a mild loss of fine details and sparkle in that area, but for my own listening enjoyment, this tradeoff is worth it for me. Soundstage The soundstage on the HD 660 S is decent, but not impressive. It's still wider than any closed back headphones I have tried, and there is enough width to get a proper sense of separation and distance. It sounds a bit wider than the 600/650 to my ears, but this might be because there appears to be a bit more air in between different sounds. On the 600/650, adjacent sounds can sound a bit more like they are transitioning into one another, while the 660 S sounds like there is much less of a transition, and more air in between sounds. Final verdict The HD 660 S does a lot of things exceptionally well, and has not revealed any major flaws. The combination of comfort, the beautifully balanced sound signature that never fatigues, the resolving capabilities, the flexibility to EQ this to a wide variety of different sound signatures all make this a headphone that is very difficult to criticize.

### ⭐⭐⭐⭐⭐ Una combinazione col DAC e Amp
*by F***O on 5 March 2020*

Dopo più di un mese d'uso, amo le cuffie di più. All'inizio, penso che non abbia molto il bass, infatti lo è, ma ci vuole un po' di tempo per abituare e per riconoscere che le cuffie sono molto bilanciate in tutte tre bass, mid e trebbe. Il bass è abbastanza per farlo sentire ma non supera il mid; il trebbe è chiaro e nitido. Senza dubbio, come le altre recensioni hanno confermato, HD660s sono assolutamente precise, fano sentire ogni cosa viene stato registrata in maniera perfetta, non confusa e bilanciata. La mia combinazione è Schiit Modi Multibit DAC, Schiit Vali 2 come amp. Ma la cosa che renderebbe tutto straordinaria è la valvola che si usa con il Vali 2. Tre esempi: quella stock (va insieme con il Vali) è una canadese 6BZ7 che da il suono naturale, abbastanza brillante, ma il bass è inferiore, non è chiaro. Tutto cambia con la Mullard E189CC (quella militare), il suono è stato molto migliorato, il bass è forte e chiaro, il mid è preciso, il trebbe è brillante come la fama di Mullard. L’ultimo esempio è quella di Philips, la E188CC SQ. Tutto è perfetto! Niente da dire. La qualità di questa valvola è incredibile. Il suono è vivace, chiaro, bilanciato. Il suono della chitarra diventa così precisa come si sede davanti il musicista. Il soundstage è molto ambio, rende la musica assolutamente musicale e piacevole sentire ma la musica non diventa superficiale ma reale. Con il tempo, le cuffie diventano comode fino a punto che non si rende conto più le sta mettendo.

## 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

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-21*