Listen to your favourite tracks on the go with the Volakno VK-1101-BK Earphones.

Featuring 10 m wireless range, you'll be able to listen to your songs loud and clear. The high sensitivity and wide frequency range lets you hear the high notes without any annoying distortion. And the build-in microphone allows you to answer calls on the go.

With a battery life that lasts up to 9 hours, you can enjoy listening on your daily commute to work.

These headphones can be folded, making them completely portable and easy to carry to the gym. They have extensive playtime, with up to 24 hours of playtime. Hands Free Calling is included, so you can easily pick up calls while working out. You can also control the sound on your headphones, making it easy to jog with.

You can listen to the radio, as well as pair your phone and listen to any of your Apps, e.g., Spotify, iTunes and Google Play, to keep you pumped and moving while you work out. There is a slot for your SD Card, so you can add a playlist to your radio.

It’s always important to get the essentials right. That’s why Sennheiser has created the new CX 80S to ensure an enjoyable sound experience, elegant design and durable build quality – brought together with the audio specialist’s signature attention to detail.

Sennheiser’s new wired in-ear headphones take an essential, purist approach: they offer a balanced sound without unwanted extremes in either high or low frequencies – just a refreshingly natural listening experience.

The earphones’ stylish compact design reflects a purity of purpose. They are lightweight for brilliant portability and created to ensure simple everyday ease of use. The inline smart remote makes it easy to manage calls and music playback. Meanwhile, a choice of three sizes of ear tips makes it effortless to achieve an excellent fit to assure comfort and superb isolation from ambient noise, for more enjoyable listening in any environment.

Headphone
-Speaker size: 40mm
-Frequency Response: 20 – 20KHz
-Impedance: 32Ω
-Sensitivity: -96 ±3db
-Max Input Power: 20mw
-Built-in Aux input: 3.5mm stereo jack

The Volkano AEON Sereis Bluetooth Earphones features Hands free Calling functionality, Magnetised Earbuds and an Aluminium Housing with a Flexible neck Band, Up to 6 Hours Play time and In-line Volume Control with 3 different Earbud Cap Sizes

The HD 400S features a one-button smart remote conveniently located on the cable, which allows you to control music and take calls with ease, and the sturdy folding design makes these headphones durable and compact enough to be taken anywhere. Sennheiser dynamic drivers deliver a well-extended sound response with dynamic bass.

What's in the box?
- HD 400S around-ear headphones
- RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug

Step up to great wireless sound with the HD 450BT from Sennheiser. Whether relaxing at home or on the go, they offer an exceptional combination of versatility and superior sound.
Created by audio specialist Sennheiser to deliver a superior sound experience with deep dynamic bass, they feature active noise cancellation to ensure enjoyment without distraction.
Sound quality is assured by the latest wireless technology including Bluetooth 5. 0 and AAC, AptX codec support with AptX Low Latency for perfectly synchronized audio when watching videos.
The Sennheiser Smart Control App makes it easy to customize the sound via the equalizer or engage podcast mode for improved intelligibility of speech content.
A great companion for travel, the HD 450BT has a superb 30-hour battery life with fast USB-C charging, a Voice Assistant button for Siri and Google Assistant interaction, and a robust folding design for take-anywhere durability.

Meet the HD 450BT Wireless Headphone
Step up to great wireless sound with the new HD 450BT from Sennheiser.
Thanks to a winning combination of superior sound quality, advanced Bluetooth technology, and an excellent 30-hour battery life, this versatile wireless headset is a companion for enjoying better audio.
Whether listening to a podcast or on the go with your favorite song, you can count on the new HD 450BT to be your ultimate companion for wireless audio – whatever you listen to.

Active Noise Cancellation
Thanks to Sennheiser’s active noise cancellation and a closed back design, the HD 450BT delivers captivating sound that can be enjoyed without distraction – even in loud environment
   
Superior Sound
Created to deliver a superior sound experience with deep dynamic bass.
Exceptional quality is assured by high-quality wireless codec support, including AAC and AptX, with AptX Low Latency to keep audio perfectly in sync with on-screen action when watching videos.
   
Perfect Travel Companion
A great companion for travel, the HD 450BT has a superb 30-hour battery life with fast USB-C charging, a Voice Assistant button for Siri and Google Assistant interaction, and a robust folding design for take-anywhere durability.
   
Personalise your Sound
The free Sennheiser Smart Control App (available on Apple & Android devices), with selectable sound modes, allows you to tailor the sound experience to your travel playlist.
Besides battery status and firmware updates, the app features a podcast mode that optimizes the intelligibility of podcasts, audio books, and other speech content.

Bring your studio sound home. The HD 200 PRO offers powerful and detailed sound for every monitoring task and for every budget. It combines with an efficient ambient noise reduction with a high resolution. Focus on your mix – at home, in your studio or during live events.

Bring Your Studio Sound Home.
As a creator, a musician or the one who is responsible for proper live sound, you need to focus on your job. The HD 200 PRO is much more than a headphone. It's designed as an in depth monitoring tool for your music. It offers a detailed, powerful sound whilst stopping any ambient noise from distracting you – be it at home, in the studio or on stage.

Outstanding, powerful sound reproduction.

You won't forget the very first time you tried the HD 200 PRO. It recreates sound in an extremely high resolution, offers every detail and every weighting you changed. If you need to validate your work, your mix, your chords – this is your tool. You're getting professional level, above-budget monitoring power with exceptional dynamics. It works with your laptop, your mixing console or electric piano and enhances your acoustic working space. And of course the HD 200 PRO are great to get some inspiration from your favorite music.

Superior fit and comfort for long sessions.

You might wear them for a long, long time, for hours and nights. The HD 200 PRO won't become a burden, because we designed it with more than 70 years of experience. So we lowered the tension of the headband and chose materials with direct contact carefully. The result: The earpads feel feather-light and perfectly enclose every ear. You might even forget you're wearing them.

Ambient noise reduction for all monitoring tasks in the studio, live and at home

Speaking of the comfort and earpads: As a monitoring tool, the HD 200 PRO will protect you from any noise that might distract you. The ambient noise reduction helps to create a clean space for your music.

Sport. For many, it's an absolutely essential way of life. Did you know, that music can help you in your activities? Music helps to keep your cadence correct - something running to heart rate monitor and a specific pace is difficult to do.

High Clarity with Strong Bass
Wireless Bluetooth 5.4
Over-ear Headphones
Aux-in
Soft and Comfortable Cushions
40mm Dynamic Driver

Specifications
Bluetooth Version: 5.4
Driver Size: 40MM
Impedance: 16 OHM
Sensitivity: 103DB ± 3DB
Max. Input Power: 20MW
Frequency Response: 20HZ-20KHZ
Wireless Operating Range: Up to 10M
Built-in Rechargeable Battery: 200MAH
Working Time: Up to 10 Hours @ 60% Volume
Charging Time: 2.5 Hours
Audio Line-in: 3.5mm Jack

Sport. For many, it's an absolutely essential way of life. Did you know, that music can help you in your activities? Music helps to keep your cadence correct - something running to heart rate monitor and a specific pace is difficult to do.

HUAWEI FreeArc

Comfort in Every Move
140° Optimal Triangle for Secure Fit1 | Sterling Sound | IP57 Water Resistance

Curved for Your Comfort
HUAWEI FreeArc is ergonomically crafted for a secure fit, as Huawei's first open-ear earbuds with earhooks, with graceful curves and a breathable and comfortable listening experience.

C-bridge Design
The earbuds' C-bridge design is based on ergonomic analysis of over 10,000 auricle curves, and painstakingly optimised to ensure that it is as comfortable to wear as it is captivating to listen on.

Ultra-thin Shape-Memory Alloy
HUAWEI FreeArc is made of a 0.7 mm high-performance Ni-Ti alloy, which offers tried-and-tested durability, and a seamlessly flexible form that adapts to various shapes of ears.

Skin-friendly Liquid Silicone
The lightweight earbuds are 81.5% covered by soft liquid silicone4 and certified by SGS Smart Green Medal Certification, remaining comfortable to wear over the long haul.

140° Optimal Triangle Design
The earbuds are engineered to stay fixed on your ears during workouts, thanks to a 140° optimal triangle support1 and gravity balance design.

Lightweight S-shaped Curves
Gentle S-shaped curves mean less pressure on the tragus, larger contact area, and a snugger, more secure fit with the bud placed in the auricle.

Standout Water Resistance
HUAWEI FreeArc is Huawei's first pair of IP57 water resistant earbuds, and packs special water-resistant mics, which help keep rain and sweat at bay during running, cycling, yoga, and a lot more.

Enchanting Look and Feel

Sterling Sound Straight to Your Ears
The innovative open-ear design keeps you aware of sounds in your surroundings, whether you're working out, at work, or just walking about.

Punchy Bass, Richer Details
Listen to your favourite songs as they're meant to be heard, full of booming bass, soaring vocals, and high-frequency sounds with richer details, provided by a 17 × 12 mm highly-sensitive driver unit, symmetrical acoustic structure, dynamic bass algorithm, and adaptive equal-loudness algorithm.

Direct Sound
Sound leakage is minimised by a sophisticated reverse sound waves system built inside the acoustic bean, meaning sounds are transmitted precisely into ear canal, making for a private listening⁠ experience.

I Crystal-clear Calls
Stay heard even when calling from outdoors, with enhanced sound pickup and noise cancellation, made possible by a prime dual-mic layout and triple call noise cancellation.

Ultra-long-range Connection
Listen to music and field calls phone-free with the powerful long-range connections made possible by Huawei's innovative dual-resonator antenna. Stay connected around a 400 m runway4 or in a 100 m² office.

Listening Made Easy

Charge Faster, Listen Longer
Listen to music for up to 28 hours with a fully charged charging case, or up to 7 hours with just the earbuds alone. You can even enjoy 3 hours of listening on a quick 10-minute charge.

Effortless Controls
Manage playback and incoming calls, with the rich array of touch controls at your fingertips.

Dual-device Connection
Connect the HUAWEI FreeArc to two devices such as phones, tablets, PCs, or watches, and seamlessly switch audio between them, whether the device runs iOS, Android, or Windows.

Audio Sharing
Connect two pairs of HUAWEI earbuds to the same HUAWEI phone or tablet to listen along with a friend or loved one.

AI Life App
Download the AI Life app for more fun and fantastic features, or the HUAWEI Audio Connect app to manage listening on iOS devices.

HUAWEI FreeArc

Comfort in Every Move
140° Optimal Triangle for Secure Fit1 | Sterling Sound | IP57 Water Resistance

Curved for Your Comfort
HUAWEI FreeArc is ergonomically crafted for a secure fit, as Huawei's first open-ear earbuds with earhooks, with graceful curves and a breathable and comfortable listening experience.

C-bridge Design
The earbuds' C-bridge design is based on ergonomic analysis of over 10,000 auricle curves, and painstakingly optimised to ensure that it is as comfortable to wear as it is captivating to listen on.

Ultra-thin Shape-Memory Alloy
HUAWEI FreeArc is made of a 0.7 mm high-performance Ni-Ti alloy, which offers tried-and-tested durability, and a seamlessly flexible form that adapts to various shapes of ears.

Skin-friendly Liquid Silicone
The lightweight earbuds are 81.5% covered by soft liquid silicone4 and certified by SGS Smart Green Medal Certification, remaining comfortable to wear over the long haul.

140° Optimal Triangle Design
The earbuds are engineered to stay fixed on your ears during workouts, thanks to a 140° optimal triangle support1 and gravity balance design.

Lightweight S-shaped Curves
Gentle S-shaped curves mean less pressure on the tragus, larger contact area, and a snugger, more secure fit with the bud placed in the auricle.

Standout Water Resistance
HUAWEI FreeArc is Huawei's first pair of IP57 water resistant earbuds, and packs special water-resistant mics, which help keep rain and sweat at bay during running, cycling, yoga, and a lot more.

Enchanting Look and Feel

Sterling Sound Straight to Your Ears
The innovative open-ear design keeps you aware of sounds in your surroundings, whether you're working out, at work, or just walking about.

Punchy Bass, Richer Details
Listen to your favourite songs as they're meant to be heard, full of booming bass, soaring vocals, and high-frequency sounds with richer details, provided by a 17 × 12 mm highly-sensitive driver unit, symmetrical acoustic structure, dynamic bass algorithm, and adaptive equal-loudness algorithm.

Direct Sound
Sound leakage is minimised by a sophisticated reverse sound waves system built inside the acoustic bean, meaning sounds are transmitted precisely into ear canal, making for a private listening⁠ experience.

I Crystal-clear Calls
Stay heard even when calling from outdoors, with enhanced sound pickup and noise cancellation, made possible by a prime dual-mic layout and triple call noise cancellation.

Ultra-long-range Connection
Listen to music and field calls phone-free with the powerful long-range connections made possible by Huawei's innovative dual-resonator antenna. Stay connected around a 400 m runway4 or in a 100 m² office.

Listening Made Easy

Charge Faster, Listen Longer
Listen to music for up to 28 hours with a fully charged charging case, or up to 7 hours with just the earbuds alone. You can even enjoy 3 hours of listening on a quick 10-minute charge.

Effortless Controls
Manage playback and incoming calls, with the rich array of touch controls at your fingertips.

Dual-device Connection
Connect the HUAWEI FreeArc to two devices such as phones, tablets, PCs, or watches, and seamlessly switch audio between them, whether the device runs iOS, Android, or Windows.

Audio Sharing
Connect two pairs of HUAWEI earbuds to the same HUAWEI phone or tablet to listen along with a friend or loved one.

AI Life App
Download the AI Life app for more fun and fantastic features, or the HUAWEI Audio Connect app to manage listening on iOS devices.

HUAWEI FreeArc

Comfort in Every Move
140° Optimal Triangle for Secure Fit1 | Sterling Sound | IP57 Water Resistance

Curved for Your Comfort
HUAWEI FreeArc is ergonomically crafted for a secure fit, as Huawei's first open-ear earbuds with earhooks, with graceful curves and a breathable and comfortable listening experience.

C-bridge Design
The earbuds' C-bridge design is based on ergonomic analysis of over 10,000 auricle curves, and painstakingly optimised to ensure that it is as comfortable to wear as it is captivating to listen on.

Ultra-thin Shape-Memory Alloy
HUAWEI FreeArc is made of a 0.7 mm high-performance Ni-Ti alloy, which offers tried-and-tested durability, and a seamlessly flexible form that adapts to various shapes of ears.

Skin-friendly Liquid Silicone
The lightweight earbuds are 81.5% covered by soft liquid silicone4 and certified by SGS Smart Green Medal Certification, remaining comfortable to wear over the long haul.

140° Optimal Triangle Design
The earbuds are engineered to stay fixed on your ears during workouts, thanks to a 140° optimal triangle support1 and gravity balance design.

Lightweight S-shaped Curves
Gentle S-shaped curves mean less pressure on the tragus, larger contact area, and a snugger, more secure fit with the bud placed in the auricle.

Standout Water Resistance
HUAWEI FreeArc is Huawei's first pair of IP57 water resistant earbuds, and packs special water-resistant mics, which help keep rain and sweat at bay during running, cycling, yoga, and a lot more.

Enchanting Look and Feel

Sterling Sound Straight to Your Ears
The innovative open-ear design keeps you aware of sounds in your surroundings, whether you're working out, at work, or just walking about.

Punchy Bass, Richer Details
Listen to your favourite songs as they're meant to be heard, full of booming bass, soaring vocals, and high-frequency sounds with richer details, provided by a 17 × 12 mm highly-sensitive driver unit, symmetrical acoustic structure, dynamic bass algorithm, and adaptive equal-loudness algorithm.

Direct Sound
Sound leakage is minimised by a sophisticated reverse sound waves system built inside the acoustic bean, meaning sounds are transmitted precisely into ear canal, making for a private listening⁠ experience.

I Crystal-clear Calls
Stay heard even when calling from outdoors, with enhanced sound pickup and noise cancellation, made possible by a prime dual-mic layout and triple call noise cancellation.

Ultra-long-range Connection
Listen to music and field calls phone-free with the powerful long-range connections made possible by Huawei's innovative dual-resonator antenna. Stay connected around a 400 m runway4 or in a 100 m² office.

Listening Made Easy

Charge Faster, Listen Longer
Listen to music for up to 28 hours with a fully charged charging case, or up to 7 hours with just the earbuds alone. You can even enjoy 3 hours of listening on a quick 10-minute charge.

Effortless Controls
Manage playback and incoming calls, with the rich array of touch controls at your fingertips.

Dual-device Connection
Connect the HUAWEI FreeArc to two devices such as phones, tablets, PCs, or watches, and seamlessly switch audio between them, whether the device runs iOS, Android, or Windows.

Audio Sharing
Connect two pairs of HUAWEI earbuds to the same HUAWEI phone or tablet to listen along with a friend or loved one.

AI Life App
Download the AI Life app for more fun and fantastic features, or the HUAWEI Audio Connect app to manage listening on iOS devices.

Type C Interface
Type interface design is compatible with mobile phone for stable connection

Button Control
One-Button control for easy operation from music to calls

Large Composite dynamic Driver
Complete with 10mm Dynamic Driver which is smaller than Similar Sized Earphones

Durable Cable Considerate Detail
High Flexibility material, anti-entanglement, anti-pull, reliable and durable for you to enjoy music

Crystal clear call quality for you chat at will
Built-in omni-directional, high sensitivity, high definition microphone to accurately pick up human voice even on noisy environment

Specifications
-Cord Type: TPE
-Connector Type: Type C
-Driver Size: 10mm
-Frequency Response: 20Hz-20KHz
-Impendence: 32Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤5% at 1KHZ
-Sound Pressure Level (SPL): 103dB ±3dB at 1KHZ

Type C Interface
Type interface design is compatible with mobile phone for stable connection

Button Control
One-Button control for easy operation from music to calls

Large Composite dynamic Driver
20% Larger Driver than similarly Sized earphones
*Market Average size of driver is 10mm at time of Production

Durable Cable Considerate Detail
High Flexibility material, anti-entanglement, anti-pull, reliable and durable for you to enjoy music

Crystal clear call quality for you chat at will
Built-in omni-directional, high sensitivity, high definition microphone to accurately pick up human voice even on noisy environment

Specifications
-Cord Type: TPE
-Connector Type: Type C
-Driver Size: 12mm
-Frequency Response: 20Hz-20KHz
-Impendence: 16Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤3% at 1KHZ
-Sound Pressure Level (SPL): 100dB at 1KHZ

Type C Interface
Type interface design is compatible with mobile phone for stable connection

Button Control
One-Button control for easy operation from music to calls

Large Composite dynamic Driver
Complete with 10mm Dynamic Driver which is smaller than Similar Sized Earphones

Durable Cable Considerate Detail
High Flexibility material, anti-entanglement, anti-pull, reliable and durable for you to enjoy music

Crystal clear call quality for you chat at will
Built-in omni-directional, high sensitivity, high definition microphone to accurately pick up human voice even on noisy environment

Specifications
-Cord Type: TPE
-Connector Type: Type C
-Driver Size: 10mm
-Frequency Response: 20Hz-20KHz
-Impendence: 32Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤5% at 1KHZ
-Sound Pressure Level (SPL): 103dB ±3dB at 1KHZ

Type C Interface
Type interface design is compatible with mobile phone for stable connection

Button Control
One-Button control for easy operation from music to calls

Large Composite dynamic Driver
Complete with 10mm Dynamic Driver which is smaller than Similar Sized Earphones

Durable Cable Considerate Detail
High Flexibility material, anti-entanglement, anti-pull, reliable and durable for you to enjoy music

Crystal clear call quality for you chat at will
Built-in omni-directional, high sensitivity, high definition microphone to accurately pick up human voice even on noisy environment

Specifications
-Cord Type: TPE
-Connector Type: Type C
-Driver Size: 10mm
-Frequency Response: 20Hz-20KHz
-Impendence: 32Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤5% at 1KHZ
-Sound Pressure Level (SPL): 103dB ±3dB at 1KHZ

Type C Interface
Type interface design is compatible with mobile phone for stable connection

Button Control
One-Button control for easy operation from music to calls

Large Composite dynamic Driver
Complete with 10mm Dynamic Driver which is smaller than Similar Sized Earphones

Durable Cable Considerate Detail
High Flexibility material, anti-entanglement, anti-pull, reliable and durable for you to enjoy music

Crystal clear call quality for you chat at will
Built-in omni-directional, high sensitivity, high definition microphone to accurately pick up human voice even on noisy environment

Specifications
-Cord Type: TPE
-Connector Type: Type C
-Driver Size: 10mm
-Frequency Response: 20Hz-20KHz
-Impendence: 32Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤5% at 1KHZ
-Sound Pressure Level (SPL): 103dB ±3dB at 1KHZ

In The Tradition of Presenting Stunning Audio Performance

XXL Driver
-20% Larger Driver than similarly Sized earphones
*Market Average size of driver is 10mm at time of Production

Xtra Bass
-Large driver uses same power to produce clearer audio and Stronger Bass

Specifications
-Cord Type: TPE
-Driver Size: 12mm
-Frequency Response: 20Hz-20KHz
-Impendence: 16Ω ±15% at 1kHZ
-Maximum Power Input: 5mW
-Total Harmonic Distortion: ≤3% at 1KHZ
-Sound Pressure Level (SPL): 100dB at 1KHZ

The open back HD 599 delivers impressively natural spatial performance. Topping Sennheiser’s 500 series, the full sized premium headphone offers near-audiophile levels of sound quality and exceptional wearing comfort thanks to the large ear cups and soft replaceable ear pads.

As successor to our popular HD 500 series, the Sennheiser HD 5 model range offers high quality and value in any aspect. Powered by Sennheiser’s proprietary transducer technology including the “ Ergonomic acoustic refinement” (E.A.R.) design, which channels the audio signal directly into your ears. Featuring a contemporary design that is both attractive and ergonomic. A real treat for all, who listen to their music with a sense of discovery.

SENNHEISER HD 599

You want to treat your ears to audiophile sound quality? This is the Sennheiser HD 5 model for you. With an impressively refined and natural sound and an uncompromising build. You’ve reached your goal.

ENTER THE ROOM OF LISTENING PLEASURE

With the HD 599 you step into the world of audiophile sound. There you will experience outstanding natural spatial performance, brought to you by high-end proprietary Sennheiser transducers. You may have listened to headphones that are quite good. The HD 599 will show you what lies beyond that. Be warned: there is no turning back.

ALSO THE COMFORT IS SUPERIOR

The HD 599 features an open-back over-ear design. Thanks to the large ear cups with soft replaceable ear pads there is no pressure on your ears, only sound. So nothing will stop you from listening to track after track, discovering what the HD 599 will show you that you haven’t even heard yet.

AUDIOPHILE SOUND CLAD IN BEAUTY

Quality you can hear, see and feel – that’s what the HD 599 is about. Its design is premium. From the brown stitches on the headband to the matte metallic detailing on the ear cups and headband. Combined with its timeless ivory color scheme, these subtle touches contribute to the HD 599’s immediate impression of substance and quality.

Occupying a unique position in the HD 500 series, the HD 569 is an excellent addition to your home entertainment system, but its closed-back, around-ear design makes it equally suitable for use in any listening environment. Proprietary Drivers from Sennheiser provide clear, powerful sound reproduction with thrilling bass response, and the closed-back ear cups reduce ambient noise to a minimum for undisturbed listening pleasure. At the same time, this design also guarantees that you won’t be disturbing others – even at higher volumes. In addition, the convenient single-button remote on the cable makes it easy to take calls and control music playback on your portable device, so you’ll definitely want to take this headset with you, when you’re out and about. Enjoy Sennheiser sound quality wherever you are with the HD 569.

- Detachable cable and 1-button remote
- Sennheiser Transducers for optimum Sound experience
- Comfortable ear pads for long listening sessions
- Replaceable ear pads
- Closed circumaural headphones for noise isolation
- Single button remote for call management

Due to their low weight and the option of one-ear listening, the HD 25 Plus headphones are indispensable for mobile monitoring. The closed-back HD 25 Plus are purpose-designed, professional monitoring headphones offering high attenuation of background noise.

Capable of handling very high sound pressure levels and of extremely robust construction, these headphones perform exceptionally well in loud environments, e.g. ENG, sound reinforcement, studio monitoring and audio equipment testing. Ideal monitoring headphones for cameramen and DJs, these are a pair of true sound professionals’ working headphones.