Garage
Shop

See all parts that fit your 2005 Expedition

Sennheiser MM 400-X

On-Ear Wireless Bluetooth Headphones w/ apt-X Technology

Sennheiser
Shop all Sennheiser
Product videos
highlight-star-icon

• On-Ear Wireless Bluetooth Headphones
• Connect Wirelessly To Any Bluetooth Apt-x Enabled Devices
• Easy Headset Controls In One Intuitive Cluster
• Neodymium Ferrous Magnet Systems Ensure Optimum Sensitivity And An Excellent Dynamic Response

Learn more about the mm400-x

We apologize

This item has been discontinued

NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
AOEM-FRD24 main

PAC AOEM-FRD24

Amplifier Integration Interface for select 2003-2014 vehicles from Ford, Lincoln, Mercury with Amplified THX and Sony Sound Systems

26
-55.82%

$56.99

List price $129.00

72-5600 main

Metra 72-5600

Install New Speakers in select 1993-2017 vehicles from Ford, Mazda, Mercury

109
-33.36%

$9.99

List price $14.99

70-5520 main

Metra 70-5520 Wiring Harness

Install a new car stereo in select 2003-2016 vehicles from Ford, Mercury, Lincoln

56
95-5026 main

Metra 95-5026 Dash Kit

Install a new Double-DIN car stereo in select 2002-2006 vehicles from Ford, Lincoln, Mercury (Black)

18
-41.68%

$13.99

List price $23.99

FD1428B main

Scosche FD1428B / FD1428 Dash Kit

Install a new Double-DIN car stereo in select 2001-2006 vehicles from Ford, Lincoln, Mercury (Black)

39
-9.51%

$11.99

List price $13.25

99-5027 main

Metra 99-5027 Dash Kit

Install a new Single-DIN car stereo in select 1995-2011 vehicles from Ford, Mercury, Lincoln (Black)

2
-11.12%

$23.99

List price $26.99

SWRFD-60L main

Crux SWRFD-60L Wiring Interface

Install new car stereo and retains steering wheel audio controls and other factory features in select 2003-2012 vehicles from Ford, Lincoln, Mercury

8
-35.71%

$85.05

List price $132.30

Limited time!
XAV-AX3200 main

Sony XAV-AX3200

6.95" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, WebLink, Apple CarPlay, and Android Auto (SiriusXM Ready)

15
-25.50%

$298.00

List price $399.99

NSP68 main

NVX NSP68

540W Peak (180W RMS) 6x8" N-Series 2 Way Coaxial Car Speakers

59
-16.67%

$79.99

List price $95.99

FRING68 main

NVX FRING68

Universal 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

12
-46.68%

$15.99

List price $29.99

Product Highlights


• On-Ear Wireless Bluetooth Headphones
• Connect Wirelessly To Any Bluetooth Apt-x Enabled Devices
• Easy Headset Controls In One Intuitive Cluster
• Neodymium Ferrous Magnet Systems Ensure Optimum Sensitivity And An Excellent Dynamic Response

Description


Sennheiser brand icon

Authorized dealer

Audiophile, Premium, Best In-Class, Sennheiser

The award winning Sennheiser MM 400-X on-ear Bluetooth headphones offer you the best of both worlds: the freedom of wireless Bluetooth music and the high quality sound that Sennheiser is known for. These premium on-ear headphones don't skimp on the internals. Utilizing the latest aptX technology, an advanced audio circuit to deliver true high-fidelity sound over Bluetooth, the MM 400-X headphones don't disappoint. Sennheiser's patented Duofol™ diaphragms provide you with incredibly detailed, crystal clear sound. To go along with the convenience of Bluetooth and awesome Sennheiser sound, the MM 400-X's were carefully engineered to provide you with the ultimate in comfort during even the longest listening sessions. Premium soft padded headphone cushions and an adjustable headband ensure these headphones allow nearly any user to wear these headphones discomfort-free for hours on end.

Enjoy Bluetooth Freedom with the Sennheiser MM 400-X HeadphonesBluetooth Freedom

No matter how carefully you wrap and store cables, they somehow find a way to get tangled up. Headphone cables are no different, and the MM 400-X headphones were designed with Bluetooth to give you that wireless freedom. Combined with the built-in microphone, these headphones are perfect for getting lost in your music and managing your calls without getting ever tangled up in that mess of wires again.

Integrated Controls for Easy UseOn-Board Controls

When you're in a groove the last thing you want to do is pull out your phone to adjust the volume or skip a track. These headphones have eliminated that inconvenience by integrating volume, track and phone call controls into the right earcup to give you total direct control of your device. You'll never have dig your phone out of your pocket, purse or backpack to control your music or answer a call again.

Collapsible Headphones for Easy PortabilityPortability

Let's face it, as much as we would all like to never take off our headphones, there comes a time where we just have to. While the MM 400-X's are best served being listened to, Sennheiser engineered them with collapsing hinges with those non-use times in mind as well. When collapsed, these headphones are incredibly compact, making them both easy to transport and store.


Do You Want to Make Your Listening Experience Better?

Then you might want to check out some of these awesome products:

Headphone Amplifiers [+]

General Features

  • On-Ear Wireless Bluetooth Headphones
  • Computer optimized magnet systems minimize harmonic and intermodulation distortion
  • Connect wirelessly to any Bluetooth apt-X enabled devices
  • Connect everywhere:to mobiles, laptops, MP3 players, or in-flight entertainment systems with an all-in-one headset solution
  • Easy headset controls in one intuitive cluster
  • Extremely lightweight aluminum voice coils ensure excellent transient response
  • Neodymium ferrous magnet systems ensure optimum sensitivity and an excellent dynamic response
  • Exceptionally natural, spatial and accurate sound
  • Detachable, Kevlar reinforced, OFC copper cable
  • Sennheiser HH 10 Universal Holder (Mount) Available
  • Primary Color Tone: Black
  • Secondary Color Accent(s): Silver, Brushed Aluminum, Blue
  • Manufacturer Part Number: 502888
  • Authorized Sennheiser Internet Retailer
  • 2-year Manufacturer's warranty

Specifications:

  • Cable length: 10 ft. (3 m)
  • Ear coupling: On-ear
  • Frequency response (headphones): 15-22,000 Hz
  • Battery:
    • Talk time: 20 hours
    • Listening time: 10 hours
    • Charging time: 3 hours
  • Sound pressure level (SPL): 107
  • Total harmonic distortion (THD): 0.1 %
  • Transducer principle: Closed, dynamic
  • Weight w/o cable: 9.2 oz. (260 g)

What's in the Box?

Sennheiser MM 400-X What's in the Box
  1. Sennheiser MM 400-X Headphones
  2. Protective Storage Case
  3. USB Wall Charger
  4. Wall Adapters for US, EU, UK and AU
  5. Audio Cable
  6. Airplane Adapter
  7. USB-to-Micro USB Cable
  8. User Guide

Loading...
REF507CF_2_MET-825601_2 main

2 Infinity REF507CF (INFSPKRF507CFUS) w/ Adapter Plates

390W Peak (130W RMS) 5.25" Reference Series 2-way 3-ohm Component Speaker System with Speaker Adapter Plates

3
-12.14%

$477.88

List price $543.88

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

59
-19.05%

$339.99

List price $420.00

Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

254
-33.36%

$79.96

List price $119.99

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

72
-10.53%

$84.99

List price $94.99

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

214
-9.16%

$109.00

List price $119.99

XED62 main

Cerwin-Vega XED62

600W Peak (70W RMS) 6.5" XED Series 2-Way Coaxial 4-ohm Speakers

15
-16.67%

$49.99

List price $59.99

Specifications & Details


Headphone Design
Headphone Type
On-Ear
Headband Type
Over the Head
Specifically For
Home/Portable
Headphone Application
Home/Office
General Features
Noise-Canceling
No
Built-In Microphone
Yes
Headphone Connection
Bluetooth Wireless
Volume Adjustment
Yes
Audio Features
Frequency Response
15 - 22000 Hz
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

MM 400-X

Weight:

1.30lbs

Internal SKU:

mm400-x

Internal Product ID:

71728

Product and How-to Videos


Customer Ratings & Reviews


Sennheiser MM 400-X thumbnail image

5 star
0%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
Sorry, no reviews found

XUBTM1 small

NVX XUBTM1

Universal Bar Mount for select NVX Bluetooth Controllers

(3)

$9.99

List price $12.49

XP-CI-BIG-100 small

Monster Cable XP-CI BIG-100

100 ft. of High Performance CL Rated Monster XP Compact Speaker Cable with a Clear Jacket and XP Technology

$56.00

List price $79.99

FA2-2000.1 small

MB Quart FA2-2000.1

2000W RMS Class D Formula Series Monoblock Car Amplifier with Bass Remote

(2)

$239.99

List price $249.99

APTT381RB small

Delfino APTT381RB Programmable Coffee Maker

12-Cup Programmable Coffee Maker with Removable Water Tank and Permanent Filter

$38.99

List price $73.00

KS-DR2104DBT small

JVC KS-DR2104DBT

600W Peak (200W RMS) Class D DRVN Series 4-Channel Marine and Powersports Amplifier with Bluetooth Remote

(1)

$399.00

List price $438.80

TS-1604B/41705 small

Axion TS-1604B/41705

Indoor Antenna

$6.00

List price $9.99

MPAV775G small

Monster Cable PowerCenter Surge Protector (MP AV 775G)

Audio/Video Monster Green Power Center Surge Protector with 7 Protected Outlets

(1)

$40.00

List price $69.99

2000004164 small

Coleman 2000004164

SportCat Catalytic Heater with InstaStart Technology

$52.08

List price $69.99

89236N small

Motorola H560

Bluetooth Hands-Free Headset with Intelligent Volume

(1)

$39.99

List price $49.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2005 Ford Expedition

2012 Tesla Model S

2012 Dodge Ram C/V

2015 Ram 2500

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.