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Sony MDR-XB400 - Black

Limited Edition Luxuriously Padded On-Ear XB Series Stereo Headphones w/ Powerful 30mm Bass Drivers


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Sony MDR-XB400, XB Means eXtra eXtreme Bass

If you love R&B, hip hop, dubstep and other bass-heavy beats, the Sony MDR-XB400 XB Series headphones were made for you. The specially designed 30mm driver units and direct vibe structure tightly sealed acoustic design combine to serve up a powerful and dynamic bass response to do your music justice. Infused with comfort-enhancing features like ultra-cushy earpads crafted from pressure-relieving urethane foam, they're perfect for those extra long playlists. Featuring a lightweight design and swivel-fold ear cups for collapsible convenience on the go, these headphones are perfect for travel. Engineered to pack the earth shattering bass of a powered home subwoofer, the 24 Ohm Sony XB400 series is a match made in heaven when paired with your new iPod Touch or iPod Nano, iPhone 5 and iPhone 5S, iPad and iPad mini, HTC One, BlackBerry, Samsung Galaxy Note and Galaxy S4, or any other portable media player. Or try listening to your favorite station on Pandora radio, and here levels off bass you never though possible. You will be convinced you are wearing a pair of bookshelf speakers on your ears, without the strained neck. You may think you have heard "Real Bass", but you haven't heard anything yet!

What's In The Box?
  1. Sony MDR-XB400 Extra Bass Headphones (Black)
  2. Flat 3.96 Foot Headphone Cable (Attached)
  3. Owners Manual & Operating Instructions
  4. Warranty Information

General Features:

  • On-Ear XB Series Extra Bass Stereo Headphones
  • Luxurious seamless, noise isolating ear pads with pressure relieving urethane foam offers users the softest, most comfortable fit available perfectly forming to the shape and contour of users ears
  • Direct-Vibe Structure and specially designed powerful 30mm drivers deliver tight, extended deep and powerful bass that perfectly complements today’s popular music genres
  • Slim in stature with swivel-fold earpads conveniently lay flat for compact storage, tight fit packing, or easy adjustments during use
  • Tightly sealed acoustic design allows for a higher level of sound isolation great for users, and equally enjoyable for neighbors close by
  • Tangle-free cable with flat design for convenient listening without the hassle
  • Adjustable headband for comfortable listening sessions
  • Nickel-plated, corrosion-resistant stereo jack
  • Main Color: Black
  • Secondary Color Accent: Silver/Chrome
  • Manufacturer Part Number: Sony MDR-XB400/BLK (MDRXB400/BLK)
  • Also Found As: Sony MDR-XB400/BLACK (MDRXB400/BLACK)
  • Sony MDR-XB400 Also available in: Blue & Black , Green & Gray , Violet Purple & White , Pink & Black , and Coming Soon In Red & Black , and All White
  • The Sony MDR-XB400iP with iPhone, iPod, iPad Mic/Remote Available In: Blue & Black,
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Headphone Design: Over-the-Head, Headband, Closed-Back
  • Speaker Type: Dynamic Driver (Supra-Aural)
  • Speaker Size: 30 mm, Dome Type
  • Magnet Type: Neodymium (Neo-Dymium)
  • Frequency Response: 5 - 22,000 Hz
  • Sensitivity: 100 dB
  • Nominal Impedance: 24 Ohms
  • Max Input Power: 1000 mW
  • Cable Type: Copper, Flat Cord
  • Cord Length: 3.96 Feet (1.2 Meters)
  • Plug Type: Gold-Plated L-Shaped Stereo Mini

Product History:

Sony MDR-XB400/BLK thumbnail
(newest, current model)
Sony MDR-XB300 thumbnail
(previous model, replaced by Sony MDR-XB400 - Black)

Headphone Design

Headphone Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Over the Head
Earpiece Design

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Specifically For
Some headphones can use an IR Transmitter in your vehicle, while some can be plugged into your media device and be used on the go or at home.

This is the lifestyle that the headphones are designed for. Each style has unique features that make it perfect for particular people.

Designed for those that are active. These headphones are made to stay in the ear during workouts. Whether you frequent the gym a lot or go running outside in the fresh air, these active style headphones will be your best friend.

For those that need the best in music quality. These audiophile headphones are engineered to produce high fidelity and accurate audio replication.

Disc Jockeys (DJs) require a special type of headphone that can meet their professional needs. These headphones are durable, loud, and will often allow for one ear listening.

Fashion Enthusiast:
For those that want to make a fashion statement with their headphones. Not only are these headphones designed with great sound quality in mind, but also great looks!

This lifestyle speaks for itself! If you love video games and want a pair of headphones that will deliver explosive sound and allow you to communicate with others, this is where you need to shop!

Music Lover:
These headphones are made to sound great. They are designed to produce rich, brilliant sounds that will play your music in a manner that the artists would appreciate. These headphones are for those that love music.

Musical Production / Recording Artists:
You're a music creator. Whether you're producing and mixing it down or in the studio recording yourself, you need a pair of headphones that will reproduce the music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Headphones need to be affordable and durable to keep up with the student lifestyle. A variety of styles can be considered a pair of student headphones.

Those that often find themselves on planes or on the road a lot. These headphones are compact, lightweight, and have a portable design. Some of the headphones in this lifestyle will feature noise cancellation technology that will help shut out outside noise.

Music Lover
Acoustic Principle
The basic design of the headphones. There are 3 different types: Open: Have ports that allow air through the back of the diaphragms, enabling the headphones to sound like the music is coming from an outside source. Closed: Completely sealed and have no air passing through the diaphragms. Sounds like you are in a closed off room. Semi-open: Have slots or ports in the back of the cup and are partially open. This allows for a mixed sound between an open and closed headphone.

General Features

Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

1/4" Stereo Jack Adapter
Some headphones will come with a 1/4" stereo jack adapter to connect the usual 3.5mm jack to a 1/4" stereo plug.

1/4" Stereo jack is a larger audio jack that select electronics have.

Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
5 - 22000 Hz
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
100 dB
Driver Size
This refers to the diameter of the driver (speaker) on each side of the headphone.
30 mm
Driver Type
The physical design of the driver in the headphones.
The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
24 ohms
Primary Color
This is the main color of the item.
Secondary Color
A color that compliments the main color of the product.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Sony MDR-XB400/BLK

November 30, 2013

Excellent product! I recommend everyone to purchase.

2 of 3 found this helpful

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Orlando, FL

most comfortable headphones ever!

October 11, 2013

these are incredible. I wish my pillow was made of this. the bass is insane! overall they are incredible headphones. I cant imagine having anything else!

3 of 5 found this helpful

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head stripe

November 10, 2013

The one and only problem I've noticed: it is not comfortable to wear it all day cause there's not a soft part to cover the head stripe. It hurts after 3hours of use.


3 of 6 found this helpful

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New Zealand

Decent pair of headphones

December 5, 2013

The soundscape of the headphones is quite wide and detailed.
The thumpy bass and undistorted highs made listening to dubstep and hip hop an extraordinary experience.

I found the sound of the headphones a bit tinny though and wondered if this was because they needed abit of wearing in.

The headphones are of decent quality for their price and i am satisfied with what I got for my money.

1 of 3 found this helpful

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Swannanoa NC

Best all around option I can find-have bought 3

January 6, 2014

I bought this model last year for my 8yr old son, good enough specs and reasonable price. I bought my oldest son a pr of Beats and they are just way overpriced for their specification and performance but he just had to have them. I perform a lot of video editing work at home and work and had been searching for a new pair for myself. I considered price ranges up to $200+ but they were just hard to justify on a combination of my budget and performance levels that would really make a difference. I bought myself a pair finally and am very happy. Bought my 3rd son a pair as well. Dynamic range is good, good bass but not overdone/muddy like some other more expensive ones.... needed realistic sound. Foam comfort is good but foam padding weakens easy although still comfortable. I wish they folded smaller but not a big deal. The best thing?... the flat cord! Ever turn your earbuds into a bird's nest?.. not with the MDR-XB400. Also like the 90 degree plug. This review is based on professional audio work for an adult down to an 8yo shooting basketball with them on.... after buying 3 I would definitely advise someone to seriously consider this model. If you have a deeper budget you can consider some higher models but you may not be gaining much vs other items you might want to buy.

2 of 6 found this helpful

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Sony MDR-XB400/BLK

October 3, 2013

I purchased these headphones some months ago and I am certainly happy how they held up. Great on the price as well. The sound clarity is clear, they handle the highs and mids nicely, not top of the line but it still sounds really good. The thing that sold me on this was that these headphones were made for bass and these headphones meet my expectations, especially for the price. They are not overly powerful as I was hoping. Though they do hit pretty hard with the right songs (such as bass boosted songs). Not meant to be noise cancelling but they do block out the exterior nose fairly well. Also ergonomically, they fit/sit on the ear very comfortably. The ear foams are softly padded and feel nice on ear. They are adjustable and I can wear them for long hours without any 'ear'itation :)

If you buy these headphones I doubt you will be disappointed or regret buying them.

2 of 6 found this helpful

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Sony MDR-XB400 - Black