Unsupported Browser

The web browser that you are currently using is no longer supported, and as such features of this website may not work as expected. We advise you to update to a currently supported browser (such as Chrome, Edge, or Firefox) to improve your security, speed, and overall experience.

Trustscore 4.8
Log in / Sign up

As a AV.com member you can quickly check out, view and track your previous orders, and choose to receive our latest offers and deals.
  • Home Cinema
      thumbnail

      Home Cinema Packages

    • thumbnail

      Amps & Receivers

      • AV Receivers
      • Subwoofer Amplifiers
    • thumbnail

      Home Cinema Speakers

      • Packages
      • Atmos Speakers
      • Centre Speakers
      • Satellite Speakers
      • Soundbars
      • Subwoofers
      • Speaker System Builder
    • thumbnail

      Home Cinema Accessories

      • Cables
      • Projector Mounts
      • TV Brackets
      • Soundbar Brackets
      • Speaker Stands
      • Speaker Wall Brackets
      • Remotes

      Home Cinema Clearance

    •  

      Popular Brands

      • Popular Brand
      • Popular Brand
  • Hi-Fi
      thumbnail

      Hi-Fi Systems

      • Turntable Systems
      • Portable Media Players
      • Radios
      • Hi-Fi System Builder
    • thumbnail

      Hi-Fi Separates

      • Amplifiers
      • Cassette Players
      • CD Players
      • DACs
      • Streaming Separates
    • thumbnail

      Hi-Fi Speakers

      • Bookshelf Speakers
      • Floorstanding Speakers
      • Active Speakers
      • Wireless Speakers
      • Subwoofers
      • Hi-Fi Speaker Bundles
    • thumbnail

      Record Players

      • Turntables
      • Turntable Systems
      • Accessories
      • Vinyl Storage
      • Cartridges
      • Record Cleaning
    • thumbnail

      Hi-Fi Accessories

      • Hi-Fi Furniture
      • Audio Cables
      • Speaker Stands
      • Speaker Wall Brackets
      • Spikes & Feet
      • Remotes
      • Acoustic Treatment
      • Grounding Hi-Fi Equipment

      Hi-Fi Clearance

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
      • Popular Brand
  • Speakers
      thumbnail

      Home Cinema Speakers

      • Speaker Packages
      • Dolby Atmos Speakers
      • Centre Speakers
      • Satellite Speakers
      • Soundbars
      • Subwoofers
      • Speaker System Builder
    • thumbnail

      Wireless Speakers

      • Smart Speakers
      • Multi-Room
      • Bluetooth Speakers
      • Portable Speakers
    • thumbnail

      Hi-Fi Speakers

      • Bookshelf Speakers
      • Floorstanding Speakers
      • Active Speakers
      • Subwoofers
      • Hi-Fi Speaker Bundles
    • thumbnail

      Installation Speakers

      • In Ceiling Speakers
      • In Wall Speakers
      • On Wall Speakers
      • Outdoor Speakers
    • thumbnail

      Speaker Accessories

      • Speaker Cables
      • Spikes & Isolation Pads
      • Speaker Hoods
      • Speaker Stands
      • Speaker Switching Units
      • Speaker Wall Plates
      • Acoustic Treatment

      Speaker Clearance

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
      • Popular Brand
  • Cables
      thumbnail

      Audio Cables

      • Speaker Cables
      • Headphone Cables
      • Coaxial Cables
      • Optical Cables
      • Stereo Phono / RCA Cables
      • Aux Cables
      • Subwoofer Cables
      • XLR & DIN Cables
    • thumbnail

      Custom Made Cables

      • Custom Made Speaker Cables
    • thumbnail

      Video & Data Cables

      • Aerial / Satellite Cables
      • Ethernet Cables
      • HDMI Cables
      • USB Cables
    • thumbnail

      Power Cables

      • Power Supplies
      • Power Distribution Units
    • thumbnail

      Cable Accessories

      • Adapters & Couplers
      • Cable Terminations
      • Cabling
      • Cable Ties

      Cable Clearance

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
  • Headphones
      thumbnail

      All Headphones

      • Wireless Headphones
      • Noise Cancelling
      • Closed Back
      • Open Back
      • Over Ear
    • thumbnail

      Earphones

      • Wireless Earphones
      • Wired Earphones
    • thumbnail

      Amplifiers

      • Headphone Amps
      • DACs
      • Media Players
    • thumbnail

      Gaming Headsets

      • Gaming Headphones
      • Gaming Earphones
    • thumbnail

      Headphones Accessories

      • Headphone Adapters
      • Headphone Cables
      • Headphone Spares
      • Headphone Stands

      Clearance Headphones

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
  • Furniture
      thumbnail

      TV Units

      • TV Cabinets
    • thumbnail

      Brackets & Mounts

      • TV Brackets
      • Soundbar Brackets
      • Speaker Wall Brackets
    • thumbnail

      Speaker Stands

      • Desk Speaker Stands
      • Satellite Speaker Stands
      • Bookshelf Speaker Stands
    • thumbnail

      Hi-Fi Furniture

      • Hi-Fi Cabinets
      • Hi-Fi Racks & Stands
      • Vinyl Storage
    • thumbnail

      Other Furniture

      • Home Office

      Furniture Clearance

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
  • Accessories
      thumbnail

      System Tweaks

      • Bags and Cases
      • Cleaning Accessories
      • Spikes & Isolation Feet
      • Stopper Caps
      • Power Supplies
      • Power Conditioning
      • Grounding Equipment
      • Remotes
      • DACs
      • Wireless Accessories
    • thumbnail

      Turntable Accessories

      • Turntable Cartridges
      • Turntable Headshells
      • Phono Stages
      • Replacement Styli
      • Turntable Tonearms
      • Record Cleaning / Care
      • Vinyl Storage
    • thumbnail

      Speaker Accessories

      • Speaker Cables
      • Spikes & Isolation Feet
      • Speaker Hoods
      • Speaker Stands
      • Speaker Switching Units
      • Speaker Wall Plates
      • Acoustic Treatment
    • thumbnail

      Headphone Accessories

      • Headphone Adapters
      • Headphone Cables
      • Headphone Spares
      • Headphone Stands
    • thumbnail

      Cable Accessories

      • Cable Terminations
      • Cable Ties
      • Banana Plugs
      • Cabling
      • Adapters & Couplers

      Clearance Accessories

    • Popular Brands

      • Popular Brand
      • Popular Brand
      • Popular Brand
      • Popular Brand
  1. Home >
  2. Headphones >
  3. All Headphones >
  4. Open Back >
  5. Sennheiser HD 660S2 Open Back Headphones

Sennheiser HD 660S2 Open Back Headphones

  • Sennheiser HD 660S2 Open Back Headphones Side View
    Loading zoom
  • Sennheiser HD 660S2 Open Back Headphones Front View
    Loading zoom
  • Sennheiser HD 660S2 Open Back Headphones Side View 2
    Loading zoom
  • Sennheiser HD 660S2 Open Back Headphones Close Up View
    Loading zoom
  • Sennheiser HD 660S2 Open Back Headphones Close Up View 2
    Loading zoom
  • Sennheiser HD 660S2 Open Back Headphones Side View
  • Sennheiser HD 660S2 Open Back Headphones Front View
  • Sennheiser HD 660S2 Open Back Headphones Side View 2
  • Sennheiser HD 660S2 Open Back Headphones Close Up View
  • Sennheiser HD 660S2 Open Back Headphones Close Up View 2
  • Video 1
prev next
View PDF
View PDF
LYT_TEXT_PREV_IMAGE
LYT_TEXT_NEXT_IMAGE
558,73 €Price Includes
VAT @ 19%
1 in stock
Item in stock and available for dispatch

We currently have this product in stock and available for dispatch.

Stock Location

German Distribution Hub:1

"Get it" shows the next available date that we will be able to deliver this item to you on, depending on the delivery option you select, and the stock availability of anything else that you add to your shopping basket.

Get it by 12th May (Fulfilled from Germany)
FREE Delivery available
Free delivery available on this item
This product can be delivered to you for free. Just add it to the basket to see the full range of services you can choose from.

The available delivery options are based on where you would like your order delivered and the contents of your basket.
Add to Basket

5-year warranty & 30-day money back guarantee included if returned unused and sealed

5-year warranty & 30-day money back guarantee included if returned unused and sealed
You can purchase from AV.com with complete confidence and peace of mind. All of our products are new unless stated and come with a 30-day money-back guarantee and a 5-year warranty as standard.

Once the product is delivered, you'll have 30 days to decide that you definitely want to keep it. If you decide it's not suitable, you can return it to us for an exchange or a refund, providing the product is unused and sealed in its original packaging.

We do everything we can to make sure the right item reaches you in perfect condition. If your order arrives damaged, or is incorrect, let us know within 14 days of receiving it and we'll arrange for a free collection.

If your goods develop a fault within the warranty period, we'll quickly repair or replace the item for you. If the fault occurs within the first 180 days of your ownership, we'll collect the goods and deliver them back to you free of charge.

We're unable to accept returns of any custom-made items designed to work together as a unique package. Some items are only eligible for the money-back guarantee if they are returned to us unused and sealed in the original packaging.

For full information on our returns policy, please refer to our returns and refunds information page.

If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.

Eligibility for Money Back Guarantee

Important: For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered." Details of exclusions are shown within the product descriptions. Products include:
- Monitors and Headphones
- Earplugs and Ear Protection
- Reeds and mouthpieces for woodwind and brass instruments
- Mouth and Lip-Care Products
- CDs, DVDs and Software

We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on AV.com.

In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.

When returning an order please ensure products are appropriately packaged and protected, to prevent them from getting damaged.

Summary of returns policies and timescales

This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.

UK & Europe EU Standard AV.com Standard AV.com Optional
Return Period 14 days 30 days up to 180 days
Standard delivery charges refunded? Yes Yes Yes, up to 30 days
Upgraded delivery charges refunded? Standard costs only Standard costs only Standard costs only
Free collection on cancellation No No Yes, up to 30 days
Free collection if defective, delivered damaged or incorrect item Yes, within 14 days Yes, within 14 days Yes, within 30 days

We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.

10-year warranty & 180-day money back guarantee included if returned unused and sealed

10-year warranty & 180-day money back guarantee included if returned unused and sealed
You can purchase from AV.com with complete confidence and peace of mind. All of our products are new unless stated and come with a 30-day money-back guarantee and a 5-year warranty as standard.

If you purchase our extended warranty for this product, we'll extend the money-back guarantee period to 180 days and the warranty period to 10 years.

Once the product is delivered, you'll have 180 days to decide that you definitely want to keep it. If you decide it's not suitable, you can return it to us for an exchange or a refund, providing the product is unused and sealed in its original packaging.

We do everything we can to make sure the right item reaches you in perfect condition. If your order arrives damaged, or is incorrect, let us know within 14 days of receiving it and we'll arrange for a free collection.

If your goods develop a fault within the warranty period, we'll quickly repair or replace the item for you. If the fault occurs within the first 2 years of your ownership, we'll collect the goods and deliver them back to you free of charge.

We're unable to accept returns of any custom-made items designed to work together as a unique package. Some items are only eligible for the money-back guarantee if they are returned to us unused and sealed in the original packaging.

For full information on our returns policy, please refer to our returns and refunds information page.

If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.

Eligibility for Money Back Guarantee

Important: For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered." Details of exclusions are shown within the product descriptions. Products include:
- Monitors and Headphones
- Earplugs and Ear Protection
- Reeds and mouthpieces for woodwind and brass instruments
- Mouth and Lip-Care Products
- CDs, DVDs and Software

We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on AV.com.

In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.

When returning an order please ensure products are appropriately packaged and protected, to prevent them from getting damaged.

Summary of returns policies and timescales

This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.

UK & Europe EU Standard AV.com Standard AV.com Optional
Return Period 14 days 30 days up to 180 days
Standard delivery charges refunded? Yes Yes Yes, up to 30 days
Upgraded delivery charges refunded? Standard costs only Standard costs only Standard costs only
Free collection on cancellation No No Yes, up to 30 days
Free collection if defective, delivered damaged or incorrect item Yes, within 14 days Yes, within 14 days Yes, within 30 days

We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.

10 YEAR EXTENDED WARRANTY SCHEME

Once the product is delivered, you have 180 days to decide that you definitely want to keep it. If you decide it is not suitable for any reason, you can return it back to us for replacement or full refund, including standard delivery charges.

All Products are new unless stated, and include a minimum of 5 years warranty.

Some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging, and in the case of software, unregistered. These items include:

  • Software
  • CDs & DVDs
  • In-ear Monitors
  • Earplugs and Ear Protection
  • Mouthpieces, Reeds etc… for Woodwind and Brass instruments
  • Mouth / Lip Care Products

We are unable to accept returns of any custom made items designed to work together as a unique package, such as computer system built to a customer’s personal specifications. Exceptions may only be possible with prior agreement of the vendor, and may be subject to a cancellation fee.

€

Spread your payment with Klarna. No fees.

Pay in 30 days

Shop now. Pay in 30 days with Klarna

Key Features

  • Open-back design creates a natural sound
  • Sub-bass extension produces deep sharp frequencies
  • 38mm high-performance transducers transmits amazing sounds
  • Steel mesh damping offers expert air displacement control
  • Ergonomic headband provides luxurious comfort

Sennheiser HD 660S2 Open Back Headphones Overview

Sennheiser

View this description in German

The Sennheiser HD 660S2 Open Back Headphones are lightweight, easily portable, and house an array of world-class audio features. The potent vented magnet system dramatically reduces distortion to make for a distraction-free listening experience. The ultra-light aluminium voice coil offers 300-ohm impedance for optimal impulse response and helps to boost the sub-bass extension to produce a powerful, thundering sound.


Enjoy a delightful sound in your home thanks to the built-in 38mm high-performance transducers and the steel mesh damping which manages air displacement and eliminates distortion. The open-back design provides an intimate way of connecting to your music, with the ergonomic headband offering incredible comfort so you will not want to turn the sound off.

Product Ref: 250942

Similar Products

Previous Image
  • Cleer Next Audiophile Headphones, Titanium

    Cleer Next Audiophile Headphones, Titanium

    816,00 €
  • Audeze LCD-2 Classic Open-Back Headphones with Carry Case

    Audeze LCD-2 Classic Open-Back Headphones with Carry Case

    899,00 €
  • Audeze LCD-2 Classic Closed-Back Headphones

    Audeze LCD-2 Classic Closed-Back Headphones

    999,00 €
Next Image

Full Description

View Full Description
Open-Back Design

Open-Back Design

The Sennheiser HD 660S2 Headphones' open back design allow air to pass through the ear cups which expertly eliminates the resonance and low-frequency build-up. The steel mesh damping feature monitors the driver's geometry to manage air displacement so you can totally immerse yourself in an extraordinary, distortion-free sound. The magnetic yoke is also equipped with milled air vents to further improve the sound. The provided 6.3 mm and 4.4 mm cables let you directly connect the HD 660S2 headphones to your smart devices and multiple HiFi separates to produce a sound that is much more clearer and impactful than wireless headphones.

Intimate Sounds

Intimate Sounds

The Sennheiser HD 660S2 provides a realistic sound that is sure to make the hairs on the back of your neck stand up. The extended sub-bass brings you closer to your music and helps to offer an 8 Hz - 41,500 Hz frequency response so you can hear the deep sound of the drums and the highest guitar chord in incredible detail. The ultra-light aluminium voice coil with 300-ohm impedance elevates the audio which makes for a rewarding listening experience. The coil is also equipped with a higher magnetic force and electrical dampening for a great impulse response.

Comfortable Listening

Comfortable Listening

The irresistible sound of the Sennheiser HD 660S2 all comes from the 38mm high-performance transducers. Designed in Ireland, these transducers offer incredible resolution and audio detail that is sure to take your music to new heights. The Sennheiser HD 660S2's ergonomically crafted headband allows for maximum comfort with the robust design ensuring long durability. The Sennheiser HD 660S2 headphones are home to velour earpads that offer acoustic positioning and supple padding to keep you solely focused on the divine sound. The Sennheiser HD 660S2's light weight allows them to be easily portable so you can switch between all your devices with ease.

Key Features

  • Open Back headphone design allows for an enhanced sound
  • The vented magnet system reduces distortion, so you can hear your music as clearly as possible
  • Steel mesh damping controls air displacement allowing for total music immersion
  • Extended sub-bass enables a wide frequency range that will optimise the sound of any music genre
  • Ultra-light aluminium voice coil provides a 300-ohm impedance to refine the audio
  • 38mm high-performance transducers transmit incredible sounds
  • Ergonomic headband ensures lovely comfort while listening
  • Rigid design enables great longevity

What's in the box?

  • HD 660S2 headphones
  • 6.3 mm cable (1.8 m) & 4.4 mm cable (1.8 m)
  • 1 x 6.3 mm to 3.5 mm adapter
  • 1 x Carry pouch

Specifications

General

Transducer principle Dynamic

open
Transducer size 38 mm
Frequency response 8 Hz - 41,500 Hz
Impedance 300 Ω
Sound Pressure Level (SPL) 104 dB (1 V)
Total Harmonic Distortion (THD) < 0.04 (1 kHz, 100dB)
Style Over-ear
Weight 260 g
Adapter 6.3 mm (1⁄4 inch) to 3.5 mm
Connector 6.3 mm (1⁄4 inch) jack plug

4.4 mm balanced plug
Cable length 1.8 m
Country of origin Ireland
Magnetic field 2.5 mT
Customs tariff code 10 digit commodity code 8518300090

Packaging

Packaging type Carton box
Dimensions product packaging (L x W x H) 242 x 182 x 100 mm
Weight of headphone with packaging 638g
Dimensions of outer master carton (L x W x H) 526 x 266 x 410 mm
Number of products per outer master carton 10
Total weight of outer master carton & products 7,080g

WEEE Packaging Information

Material of single package (incl. weight) 200 g
Material of outer master carton (incl. weight) 700 g
WEEE weight (net weight) 388 g

Related Products

Previous Image
  • Fisual S-Flex Mini 3.5mm Jack Splitter

    Fisual S-Flex Mini 3.5mm Jack Splitter

    4,08 €
  • Fisual S-Flex Mini 3.5mm 4 Pole Jack Extension Cable 1m

    Fisual S-Flex Mini 3.5mm 4 Pole Jack Extension Cable 1m

    7,58 €
  • Mighty Mate MM5 Premium Black Headphone Stand

    Mighty Mate MM5 Premium Black Headphone Stand

    5,83 €
  • Grado Prestige 15cm Mini Adaptor Cable 6.3mm - 3.5mm

    Grado Prestige 15cm Mini Adaptor Cable 6.3mm - 3.5mm

    17,52 €
Next Image
Click here to buy Sennheiser HD 660S2 Open Back Headphones and your selected related products

| Reviews of our service

Showing our latest reviews
View all
×
Oops! There was an error retrieving our TrustPilot reviews. Please, try again later.
Trustpilot Logo
Trustpilot Stars
TRUSTSCORE 4.8
Apple Pay image Visa image Mastercard image Payment card image Payment card image Paypal image
MasterCard SecureCode
Verified by Visa
  • Speakers
  • Subwoofers
  • Hi-Fi Amplifiers
  • Turntables
  • CD Players
  • Headphones

AV.com

Registered address: Holgate Park Drive, York, United Kingdom, YO26 4GN (This is not AV.com's postal address, this can be found here) UK company number 03113256 VAT number 278462656 AV.com, which was previously known as AVOnline, is owned and operated by Gear4music Limited. Gear4music is owned by Gear4music (Holdings) plc, a London Stock Exchange listed business with over 500 staff and revenues of approximately £150m.
Click here to visit our Investor Website.

Accounts

Trade Account

Education Account

Log in

Information

Start your return

Cancel your order

Start your trade-in

Careers

Terms and Conditions

Finance FAQs

Privacy and Cookie Policy

Site Map

Modern Slavery Statement

Switch to Mobile site

© AV.com 2021-2025

Select your country and language to see local prices and delivery options.

  • DeutschlandDEEN
  • United KingdomEN

Our Cookies

Our site uses cookies to give you the best possible experience. You can accept all cookies or manage them below.

More information can be found at any time on our cookie policy page.

Essential cookies

We use these cookies for functions such as making payments and displaying relevant content. These can't be switched off.

Other cookies

These cookies help us to improve your shopping experience. They allow us to gather feedback on your shopping behaviour and to show content and offers relevant to you.

Our Cookies

Our site uses cookies to give you the best possible experience.
Accept all cookies to get the most out of our site or customise your preferences here