---
product_id: 529596679
title: "HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty"
brand: "sennheiser"
price: "KSh113195"
currency: KES
in_stock: true
reviews_count: 8
category: "Sennheiser"
url: https://www.desertcart.co.ke/products/529596679-hd-660s2-open-back-hi-res-audiophile-headphones-ultra-light
store_origin: KE
region: Kenya
---

# 300Ω impedance for audiophile-grade clarity Extended sub-bass impact for deep, distortion-free lows 38mm ultra-light aluminum voice coil for pristine sound HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty

**Brand:** sennheiser
**Price:** KSh113195
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your audio game—hear what others miss!

## Quick Answers

- **What is this?** HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty by sennheiser
- **How much does it cost?** KSh113195 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/529596679-hd-660s2-open-back-hi-res-audiophile-headphones-ultra-light)

## 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

- • **Bass That Moves You:** Redesigned voice coil and airflow transducer double sub-bass output without distortion—feel every beat.
- • **Engineered for Endurance:** Lightweight 260g frame with plush velour ear cushions ensures fatigue-free comfort during marathon sessions.
- • **Precision German Engineering:** Expertly crafted components assembled in Ireland guarantee consistent, premium build quality.
- • **Immersive Soundstage Experience:** Open-back design recreates natural, speaker-like spatial audio for critical listening.
- • **Versatile Connectivity & Peace of Mind:** Includes balanced and unbalanced cables plus a 2-year warranty for seamless, worry-free use.

## Overview

The Sennheiser HD 660S2 are open-back audiophile headphones featuring a 300 Ohm impedance and a 38mm ultra-light aluminum voice coil that delivers an extended frequency response from 8Hz to 41.5kHz. Designed with advanced airflow-optimized transducers and plush velour ear cushions, they provide deep, distortion-free sub-bass and exceptional comfort for long listening sessions. German-engineered and Irish-assembled, these headphones come with balanced and unbalanced cables plus a 2-year warranty, making them a top-tier choice for discerning music professionals and enthusiasts.

## Description

From the manufacturer Sennheiser HD 660S2 Dive deeper into legendary sound. Enjoy your music on a completely new level. An intimate, relaxed sound signature combines with outstanding precision and exceptional comfort — and now, extended sub bass — for a deeply moving experience. Double the sub bass heightens your listening experience. Enjoy your music on a completely new level. How do you one-up a line of legends? High-end Sennheiser headphones like the HD 600, HD 650, and HD 660S are known for their balanced, natural sound. The HD 660S2 shares this legacy with a revised 300-ohm coil for cleaner impulse response, a compliant surround for lower resonant frequency, and optimized airflow for better sensitivity. They feel as great as they sound The velour earpads can only be described as a tactile pleasure. With the right amount of tension for proper acoustic positioning and supple padding, the headband won’t draw attention away from your music, either. As an open-back design, the HD 660S2 gives your ears an extremely comfortable climate. Natural, non-fatiguing sound for gamers and streamers. Do you recognize the feeling of listening to harsh sounds that annoy you for long periods of time? The HD 660S2 has been developed for detailed yet fatigue-free treble reproduction to keep you focused all day long. With comfort this good, you’ll be ready to extend your gaming sessions even further.

Review: Best entry audiophile headphones - Been using for 6 months now, even with rough use its been holding up better than my gaming headphones (Logitech G pro X). It was able to run off my motherboard audio(supremefx audio chip with 9 resistors) But even with full volume it only gave out what my Dac & Amp gives in 15-20 volume Pros: long lasting comfort for my big head with ample earcup size, no matter how high the volume is, the headphones don’t crackle or cut out the sounds, you may need a appropriate Dac and amp to support these headphones (the one I use it Fiio K11 R2R). Can be run off iphone with iphone’s headphone dongle too. Cons: the size adjustment Sometimes feels very hard to adjust which in turn feels like breaking, but the build quality is insane for what its worth, and even with getting the headphone get hit or banged on table, i dont see any visible scratches after 6 months. The velour earpads need some maintenance tho If u r a bass lover, open back headphones are not for you But if you try these out, u wouldn’t want to go back to closed back or bassy headphones much
Review: Amazing detail & wide soundstage from a closed back - Amazing detail in sound. The HD820 headphones are very comfortable with moderately good sound isolation. The headphones originally had an issue with the right side driver emitting soft rattle with heavy bass frequencies. Contacted Sennheiser (Sonova India) and got a replacement under warranty. The experience with Sennheiser Service (Sonova India) was seamless. Everyone along the chain were prompt in responding & updated me on the status. The Rep assisted me by guiding me on how to send them to the service centre in Delhi. Everything went seamless. With this service experience with Sennheiser India, i now have more confidence in buying more Sennheiser products. I constantly keep track for deals on Sennheiser Headphones. Started my Audiophile Journey with Sennheiser MXW1 (World's 1st Wireless Earbuds) in 2008 and bought several Sennheiser Headphones all over the world since. No matter what country i was in i was able to find Sennheiser products easily compared to any other brand. The journey continues.

## Features

- GERMAN‑DESIGNED, IRISH‑ASSEMBLED – Expertly engineered components from Germany assembled in Ireland, ensuring consistent build precision and quality
- EXTENDED SUB‑BASS IMPACT – Redesigned voice coil and optimized airflow double low-frequency output for deep, impactful bass without distortion
- 38MM ULTRA‑LIGHT ALUMINUM VOICE COIL – Delivers improved impulse response and pristine clarity across the 8Hz–41.5kHz range.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
- AIRFLOW‑OPTIMIZED TRANSDUCERS – Advanced vented magnet system and steel-mesh damping reduce distortion while maintaining tight bass and airy mids
- HIGH IMPEDANCE & OPEN DESIGN - 300 Ohm open-back dynamics produce a neutral, relaxed, high-fidelity listening experience ideal for critical listeners
- PREMIUM COMFORT FOR ENDURANCE LISTENING – Lightweight (~260 g), velour ear pads, and ergonomic headband ensure fatigue-free comfort even during extended use
- SPEAKER‑LIKE SOUNDSTAGE – Designed to recreate the openness and space of high-end speakers, capturing natural sound imaging
- INCLUDES PREMIUM ACCESSORIES – Comes with both 4.4 mm Pentaconn balanced and 6.3 mm unbalanced cables plus 3.5 mm adapter for versatile connectivity and carry case
- BACKED BY A 2-YEAR WARRANTY – Enjoy peace of mind with Sennheiser’s trusted quality assurance and after-sales support.
- SPECIFCATIONS - Transducer principle : dynamic, open,Impedance : 300 Ohms, Frequency response (speaker) : 8 Hz - 41,500 Hz, Sound pressure level (SPL) : 104 dB (1 V), Total harmonic distortion (THD) <0,04 % (1kHz/100 db SPL) Adapter: 6.3 mm (1⁄4 inch) to 3.5 mm, Cable length : 1.8 M

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BT7XXYTB |
| Age Range Description | Adult |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #126,025 in Electronics ( See Top 100 in Electronics ) #336 in Over-Ear Headphones |
| Box Contents | 6.3 mm cable (1.8 m), 4.4 mm cable (1.8 m), 6.3mm to 3.5mm adapter, HD 660S2 headphones, Protective Case |
| Brand | Sennheiser |
| Brand Name | Sennheiser |
| Cable Features | Detachable |
| Colour | Black, |
| Compatible Devices | Cellphones, Gaming Consoles, Laptops, Music Production Equipment, Portable Media Player, Tablets |
| Control Method | Touch |
| Control Type | Media Control |
| Country of Origin | Ireland |
| Customer Reviews | 4.5 out of 5 stars 581 Reviews |
| Ear Placement | Over Ear |
| Earpiece Shape | Over Ear |
| Enclosure Material | Aluminium |
| Form Factor | Over Ear |
| Frequency Range | 27.5 Hz - 41,500 Hz |
| Frequency Response | 41500 Hz |
| Global Trade Identification Number | 00810091270370, 04260752330374 |
| Headphone Form Factor | Over Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | Over Ear |
| Impedance | 300 Ohms |
| Impedance Unit of Measure | 300 Ohms |
| Importer Contact Information | Sennheiser Electronics India Private Limited, 104 A,B,C Time Tower, Mehrauli-Gurgaon Rd, Sector 28, Gurugram, Haryana 122002 |
| Is Autographed | No |
| Item Type Name | Audiophile Headphone |
| Item Weight Unit of Measure | 260 Grams |
| Manufacturer | Sennheiser, Sennheiser electronic gramsbH & Co. kilograms. Am Labor 1. DE - 30900 Wedemark Germany |
| Manufacturer Contact Information | Sennheiser electronic gramsbH & Co. kilograms. Am Labor 1. DE - 30900 Wedemark Germany |
| Model Name | HD 660S2 |
| Model Number | 700240 |
| Network Connectivity Technology | Wired |
| Noise Control | None |
| Number of Items | 1 |
| Packer Contact Information | Sennheiser electronic gramsbH & Co. KG. Am Labor 1. DE - 30900 Wedemark Germany |
| Product Features | Audiophile Stereo Headphones |
| Series Number | 660 |
| Theme | music |
| UPC | 810091270370 |
| Unit Count | 1 Count |
| Warranty Description | 2 Year Warranty |

## Product Details

- **Brand:** Sennheiser
- **Colour:** Black,
- **Ear Placement:** Over Ear
- **Form Factor:** Over Ear
- **Impedance:** 300 Ohms

## Images

![HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty - Image 1](https://m.media-amazon.com/images/I/61M8UEZMQAL.jpg)
![HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty - Image 2](https://m.media-amazon.com/images/I/516yNfWkoPL.jpg)
![HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty - Image 3](https://m.media-amazon.com/images/I/51uQR0+q9kL.jpg)
![HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty - Image 4](https://m.media-amazon.com/images/I/51fHpK5F-ZL.jpg)
![HD 660S2 Open‑Back Hi-Res Audiophile Headphones, Ultra‑Light Aluminum Voice Coil, Extended Sub‑Bass, 300 Ohm Impedance & Airflow Transducer, Plush Ear Cushions, Premium Comfort, 2Y Warranty - Image 5](https://m.media-amazon.com/images/I/51x1Qj2WbML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best entry audiophile headphones
*by A***D on 8 October 2025*

Been using for 6 months now, even with rough use its been holding up better than my gaming headphones (Logitech G pro X). It was able to run off my motherboard audio(supremefx audio chip with 9 resistors) But even with full volume it only gave out what my Dac & Amp gives in 15-20 volume Pros: long lasting comfort for my big head with ample earcup size, no matter how high the volume is, the headphones don’t crackle or cut out the sounds, you may need a appropriate Dac and amp to support these headphones (the one I use it Fiio K11 R2R). Can be run off iphone with iphone’s headphone dongle too. Cons: the size adjustment Sometimes feels very hard to adjust which in turn feels like breaking, but the build quality is insane for what its worth, and even with getting the headphone get hit or banged on table, i dont see any visible scratches after 6 months. The velour earpads need some maintenance tho If u r a bass lover, open back headphones are not for you But if you try these out, u wouldn’t want to go back to closed back or bassy headphones much

### ⭐⭐⭐⭐⭐ Amazing detail & wide soundstage from a closed back
*by A***U on 24 June 2025*

Amazing detail in sound. The HD820 headphones are very comfortable with moderately good sound isolation. The headphones originally had an issue with the right side driver emitting soft rattle with heavy bass frequencies. Contacted Sennheiser (Sonova India) and got a replacement under warranty. The experience with Sennheiser Service (Sonova India) was seamless. Everyone along the chain were prompt in responding & updated me on the status. The Rep assisted me by guiding me on how to send them to the service centre in Delhi. Everything went seamless. With this service experience with Sennheiser India, i now have more confidence in buying more Sennheiser products. I constantly keep track for deals on Sennheiser Headphones. Started my Audiophile Journey with Sennheiser MXW1 (World's 1st Wireless Earbuds) in 2008 and bought several Sennheiser Headphones all over the world since. No matter what country i was in i was able to find Sennheiser products easily compared to any other brand. The journey continues.

### ⭐⭐⭐⭐⭐ Amazing
*by B***H on 2 October 2025*

Wow ,paired with Fosi DS2 balanced output and voila! What a soundstage. Everything is perfect,I didn’t know fosi has so much details and neutral soundstage. Apple Lossless sounds like never before on iPhone 14

## Frequently Bought Together

- Sennheiser HD 660S2 Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black
- FIIO K11 Desktop 1400W Power Balanced Headphone DAC & Amplifier 384kHz/24Bit DSD256 for Home Audio/PC 6.35mm/4.4mm/RCA/Coaxial/Optical (Black)
- NewFantasia 4.4mm Balanced Male 6N OCC Copper Silver Plated Cord 4.4mm Balanced Cable Compatible with Sennheiser HD650, HD600, HD580, HD660S, HD58X, Massdrop HD6XX Headphone Walnut Wood Shell

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-12*