Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.
Features
Overview: The Sennheiser MM 400-X headphones are an
accessory that allows you to enjoy your digital music files on your mobile phone
or portable music device, including those equipped with Bluetooth technology.
The MM 400-X can be used wirelessly, or in places where Bluetooth isn't
available, you can plug them in and use them as wired headphones.
Bluetooth Wireless Reception/Transmission: The MM 400-X features Bluetooth v2.1 wireless reception and transmission with a built-in
microphone for cable-free use with select Bluetooth enabled phones and audio
devices. Supported Bluetooth profiles include A2DP (Advanced Audio Distribution
Profile), AVRCP (Audio/Video Remote Control Profile), HSP (HeadSet Profile), and
HFP (Hands-Free Profile). The MM 400-X saves the connection profiles of the last
eight devices with which it was paired; when turned on it automatically tries
to connect with one of those devices.
Note: Not all Bluetooth enabled audio
devices will be compatible.
apt-X: The MM 400-X headphones are equipped with apt-X, an
audio coding technology that works within Bluetooth to wirelessly deliver
CD-quality audio from your portable music device to the headphones. With apt-X,
you can listen to your digital music files in crisp, pure, and full stereo
sound. The following 3rd party devices / configurations have built-in apt-X
support (as of 7/18/2012):
- Apple Mac OS X Snow Leopard and Lion Operating Systems
- Apple Mac Mini (latest generation with latest OS update)
- Apple Macbook Air (latest generation with latest OS
update)
- Apple Macbook (latest generation with latest OS update)
- Arcam Wireless Bluetooth DAC
- Burmester 113 DAC
- Creative Zen X-Fi3
- Creative Ziio Tablet 7 inch
- Creative Ziio Tablet 10 inch
- HTC One X
- HTC One S
- HTC One V
- Motorola Razr
- Motorola Razr Maxx
- Samsung Galaxy Tablet 7.0 Plus
- Samsung Galaxy Tablet 7.7
- Samsung Galaxy S III
- Sharp Aquos Phone SH-06NERV
- Sharp Aquos Phone SH-07D
- Sharp Aquos Phone ISW16SH
- Sharp Aquos Phone SH-09
Controls: On the right ear-cup there are integrated controls
for your connected phone or audio device. Audio controls include volume, skip
forward or backward, fast forward or rewind within a song, play, and stop. Phone
controls include volume, accept call, reject call, end call, redial, voice dial,
and mute.
Note: All control functions must also
be supported by the connected device.
Battery Pack: The MM 400-X has a removable BA 370 PX Lithium-Polymer
battery pack (3.7 volts DC/1 Wh) which provides up to 10 hours playback using
Bluetooth reception. A power supply with US, UK, European, and Australian plug adapters is included
to charge the battery pack; charging time is approximately three hours. The headphones
can also be charged using a computer's USB port.
Collapsible Design: These headphones feature a collapsible
design with metal-reinforced headband to ensure portability and durability.
Cord & Adapter: The MM 400-X will also work as wired
headphones, useful when Bluetooth connection is not an option. The headphones
come with a 60" mini-jack cable terminated by a 3.5mm connector for a wired
connection. An in-flight audio adapter
(dual mono 3.5mm) is included for added convenience.
Carrying Case: A nylon carrying case is included to protect
the headphones during storage or transport.
Specifications: The MM 400-X has the following specs:
- Frequency Response: 15-22kHz
- Nominal Impedance: 590 Ω active mode; 100 Ω
passive
- SPL (1 kHz/1 Volt): 107 dB
- THD (1 kHz): < 0.1%
- Connectors: 3.5mm, 3.5mm double mono plug in-flight
adapter
- Weight: 3.7 ounces (105 grams)
- Bluetooth:
- Version: 2.1 + EDR
- Range: up to 33' (10 meters)
- Transmission Frequency: 2.4 GHz
- Transmission Power: 8 dBm
- Profiles: HSP, HFP, A2DP, AVRCP
- Codec: SBC, apt-X
