Personal Audio
MM 400 - Sennheiser USA
Article No. 502888
Key Features
- Wireless, stereo A2DP Bluetooth®
- Simple-to-use call/music controls
- Invisible microphone for making calls
- Folds up for compact storage/transport
Wireless Stereo Headset - Bluetooth Stereo Headset - High Sound Quality
$269.95
Related product
$269.95
General Description
The MM 400 is a state-of-the-art Stereo Bluetooth® headset for multimedia-capabile mobile phones.
With one press of a button, you can quickly switch between calls and music delivered in superb stereo sound. The invisible high-performance microphone ensures that conversations are clear, making this headset the perfect all-in-one sound solution for your digital lifestyle.
Using a closed, on-the-ear design to block ambient noise, the MM 400 is an ideal companion for the urban commute or frequent traveller. Advanced DuoFol transducers provide the kind of detail and frequency response you would expect out of hi-fidelity audiophile speakers. The easy-to-use control panel is intuitive and simple enough to operate with your eyes closed-- a common way of enjoying Sennheiser's world-famous sound quality.
The MM 400 folds up for the ultimate in portability. The replaceable battery charges via USB or a wall adapter. For situations where Bluetooth is not permitted, you can use the included audio cable for a direct connection- making the MM 400 an extremely capable wired headphone as well.
Features
- Wireless freedom with Stereo A2DP Bluetooth®-- hands-free convenience and hi-fi stereo sound
- Discrete, invisible microphone is always out of the way
- Direct cable option – listen as a wired headphone when Bluetooth is not permitted
- iPhone/iPod/iPad compatible, compatible with all 1/8" (3.5mm) headphone plugs
- Easy-to-use controls are within optimum reach and provide concise "click" feedback
- World-famous Sennheiser acoustics from patented DuoFol transducer system
- Plush ear cushions seal out ambient noise while maintaining luxurious comfort for hours on-end.
- Collapsible headset stores in a compact footprint for convenient portability
- Replaceable battery charges via USB port or supplied wall adapter
- Connect everywhere – to mobiles, laptops, MP3 players, or in-flight entertainment systems with an all-in-one headset solution
- Built-tough with a 2-year international warranty
- -----
- The MM 400 is also available without a microphone for listening to music wirelessly-- see the PX 210 BT
- *only the latest iOS supports full AVRCP. To add AVRCP to the iPhone you may use the BTD 300i or upgrade your iOS
- Due to the nature of Bluetooth technology, users may experience a slight audio latency when watching video on a portable device. The headphones are working fine. This is a characteristic of all Bluetooth headsets. Latency is not an issue for audio-only use, OR when using the included detachable headphone cable for a wired audio connection when watching video.
Delivery Includes
- MM 400 headset
- Audio cable with in-flight adapter (3.5mm double mono adapter)
- USB cable
- Wall charging adapter
- Carrying case
- Compatible with latest generation of tablets
$269.95
Technical Data
| Wearing style | On-the-ear |
| Transducer principle | Sealed (closed) |
| Technology | Bluetooth® 2.0 + EDR / supported profiles: A2DP + AVRCP + HSP + HFP |
| Talk time | Up to 20 hours |
| Listening time | Up to 10 hours |
| Charging time | Approximately 3 hours |
| Range | 33 feet |
| Weight | 3.7 oz (105 g) |
| Frequency response (headphones) | 15 - 22,000 Hz |
| Total harmonic distortion (THD) | <0.1% (1 kHz) |
| Sound pressure level (SPL) | 107 dB |
| Frequency response (microphone) | 100 - 10,000 Hz |
| Pick-up pattern | Omni-directional |
| (*) | --------------- |
| UPC code | 615104170704 |
| EAN code | 4044155 045611 |
| Dimensions (single) | 7.5 x 3.3 x 7.9 inches |
| Weight (single) | 1.9 pounds |
| Dimensions (master carton) | 18.5 x 17.7 x 9.3 |
| Weight (master carton) | 19.8 |
| Master carton quantity | 10 |
| Headphone connector | 1/8 inch (3.5mm) |
$269.95
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Glossary
| Charging time |
| The time required to recharge a Sennheiser accupack. After recharging, automatic chargers will automatically switch to trickle charging. |
| Frequency response (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| Frequency response (microphone) |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| Pick-up pattern |
| Also known as polar pattern, directivity. According to their acoustic design, microphones differ in their sensitivity towards sound from different directions. Pressure microphones have a sensitivity that is largely independent of direction (omni-directional pick-up pattern). Pressure gradient microphones have the pick-up patterns wide cardioid, cardioid, super-cardioid or figure-of-eight. Interference microphones can be used to achieve a further concentration of the pick-up pattern (lobar pick-up pattern). As a special case, dummy head microphones achieve the pick-up pattern of the human ear/head (dummy head stereo). |
| Range |
| See RF wireless headphones, transmission loss. |
| Sound pressure level (SPL) |
| Due to the impractical numerical values, the sound pressure is usually given as the logarithmic value of the sound pressure level according to the equation: dB SPL = 20 x log (po / 0.00002 Pa). The abbreviation SPL (sound pressure level) is added in order to make a clear distinction from other uses of dB. The reference sound pressure, which is at the same time the threshold of hearing, is then 0 dB SPL. The threshold of pain is 140 dB SPL. A difference in the sound pressure level of 1 dB is just about perceptible, while a doubling of the sound pressure corresponds to 6 dB and a doubling of the volume corresponds to a rise of 10 dB. |
| Total harmonic distortion (THD) |
| Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%. |
| Transducer principle |
| Two transducer principles have become established for the conversion of electric energy into mechanical energy: electrodynamic and electrostatic transducers, whereby the latter is only to be found in audiophile systems, due to their relatively high manufacturing costs. Electrodynamic transducers basically consist of a ring-shaped permanent magnet and an oscillation coil, which is fixed to the receiver diaphragm. When an audio-frequency alternating current is passed through the oscillation coil, it is caused to vibrate in accordance with the audio-frequency alternating current, thus causing the diaphragm to vibrate in the same way. |
