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apt-X audio coding

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MM 400-X

apt-X audio coding

Outstanding audio quality

apt-X technology is what wireless audio has been waiting for. With apt-X
audio coding, you can be assured of crisp, pure and full stereo sound.
It allows you to not only hear, but experience and feel the audio as it was
intended. Utilizing apt-X, 

Bluetooth

 can now offer wireless audio quality

that is indistinguishable from the highest quality wired connection.

Professional grade sound

Until now, apt-X has been the best-kept secret of the professional audio
industry. From major public broadcasters to film production studios, apt-X
is used throughout the world to transmit high quality digital audio from
A to Z in real-time. It was developed to meet the exacting standards of
musicians and audio engineers who love the exceptional dynamic range
and high fidelity it provides.

Now available on selected consumer devices, the technology ensures that
music lovers everywhere can stream the rich listening experience that only
apt-X can deliver.

Revolutionizing Bluetooth

listening

Bluetooth

 technology has revolutionized our communications and life-

style by eliminating troublesome wires and letting us get on with life “on
the move”. Listening to a mobile phone conversation on a 

Bluetooth

earpiece sounds just fine but when it comes to delivering full stereo sound,
a little extra help is required. apt-X works within 

Bluetooth

 to deliver

CD quality audio, ensuring you are getting the most from your wireless
listening experience.

In order to deliver two-channel digital sound within the 

Bluetooth

 A2DP

profile, audio compression is necessary. While traditional audio compres-
sion technologies struggle to provide full-bandwidth, high-fidelity audio
over 

Bluetooth

, apt-X works to ensure you enjoy the fullest, richest sound

your music collection has to offer.

apt-X legacy

If you have ever been to the movies or listened to the radio then chances
are you’ll already have heard apt-X in action. Over 20,000 radio stations
across the world and thousands of cutting-edge film studios rely on apt-X
for high quality audio delivery.

The digital compression technology now known as apt-X was originally
developed in Queen’s University, Belfast, Northern Ireland. The technology
was first brought to market for radio automation applications to store CD
quality audio on computer hard drives for direct playout during radio
shows, hence automating the process of the disc jockey.

The acclaim the technology received lead to further research and develop-
ment and throughout the 1990s the technology was used by Broadcast
and Post-production studios worldwide to deliver high-fidelity, low latency
audio in situations where bandwidth was limited. The same core principles
that have earned apt-X worldwide acclaim in the Broadcast and Post-
Production markets make it the perfect solution for delivering high quality
audio on wireless devices. apt-X is leading the way in bringing pro-audio
quality to the discerning consumer.

Summary of Contents for MM 400-X

Page 1: ...MM 400 X Instruction manual...

Page 2: ...400 X to the audio source 11 Connecting the MM 400 X using the audio cable 13 Switching the MM 400 X on off 14 Using the MM 400 X 15 Switching the Bluetooth function on off 15 Changing the volume 15...

Page 3: ...special attention e g in traffic Preventing damage to the product and malfunctions Always keep the product dry and do not expose it to extreme temper atures hairdryer heater extended exposure to sunli...

Page 4: ...ve product Only use battery packs recommended by Sennheiser Dispose of the battery pack at special collection points or return it to your specialist dealer Switch battery pack powered products off aft...

Page 5: ...llows you to not only hear but experience and feel the audio as it was intended Utilizing apt X Bluetooth technology can now offer wire less audio quality that is indistinguishable from the highest qu...

Page 6: ...0 X Travel MM 450 X Travel MM 500 X MM 400 X USA FCC ID DMOCBSSAB Canada IC 2099D MMBTX IC 2099D MMBTX IC 2099D MMBTX IC 2099D MMBTX Europe Australia New Zealand Singapore Taiwan CCAB09LP4110XX Japan...

Page 7: ...until the desired setting is made or the desired action is completed Pictogram Meaning This pictogram symbolizes a flashing This pictogram symbolizes an interruption This pictogram symbolizes an inte...

Page 8: ...Operating panel Headband Ear pad Microphone Socket for charging cable Socket for audio cable Battery pack compartment Bluetooth button A A 1 LED 4 Rewind button 2 Fast forward button 5 Master button...

Page 9: ...operation When charging the battery pack the LED on the battery pack lights up red When the battery pack is fully charged the LED on the battery pack lights up green When the battery pack is almost f...

Page 10: ...set This is helpful if you are using a spare battery pack to be ordered separately To charge the battery pack inside the headset Open the cover of the battery pack compartment on the left ear cup Conn...

Page 11: ...battery pack is being charged The LED on the battery pack lights up red After charging unplug the mains unit from the wall socket If you have charged the battery pack outside the headset Insert the c...

Page 12: ...the headset with a ninth audio source the saved connection profile of the first Bluetooth device will be overwritten If you want to re establish a connection with the first audio source you have to p...

Page 13: ...es off after 60 minutes In this case repeat the necessary steps to pair the headset with the audio source again Disconnecting the Bluetooth connection The Bluetooth button is backlit indicating the cu...

Page 14: ...socket of the headset Connect the 3 5 mm jack plug of the audio cable to the headphone socket of your audio source or the in flight adapter if you want to use the headset with an in flight entertainme...

Page 15: ...the headset is already paired with an audio source but the audio source is switched off or out of range the LED 1 flashes blue The headset will try for 3 minutes to connect to one of the up to 8 prev...

Page 16: ...ntil the LED 1 flashes 3 times blue The Bluetooth function is switched on To switch the Bluetooth function off Press the Bluetooth button and keep it pressed until the LED 1 flashes 3 times red You he...

Page 17: ...ur device supports the AVRCP profile Remote controlling the audio source from the MM 400 X If your headset has a Bluetooth connection to an audio source e g mobile phone iPod MP3 or CD player you can...

Page 18: ...ress a button on your mobile phone to transfer the call see the instruction manual of your mobile phone To manage your calls from your MM 400 X press the Master button 5 or the Bluetooth button Redial...

Page 19: ...your MM 400 X press the Bluetooth button Muting the headset s microphone To mute the microphone on your MM 400 X press the the Bluetooth button Button Duration Function Activates voice dialing Deacti...

Page 20: ...transportation the headset can be folded up flatly and compactly Rotate the ear cups by 90 Fold the ear cups inwards Place the headset flat into the transport case Your accessory can be transported i...

Page 21: ...You can replace the ear pads Spare ear pads are available from your Sennheiser partner or can be ordered at www sennheiser com under Service Support Grasp the edge of the ear pad behind the ear cup an...

Page 22: ...is paired If necessary pair the headset with the audio source again 12 The Bluetooth function on the headset is switched off Switch the Bluetooth func tion on the headset on 15 The audio cable is con...

Page 23: ...tooth enabled devices You can then pair five new devices with the headset Press the Master button 5 and keep it pressed until the LED 1 flashes 3 times red The headset switches off see Switching the M...

Page 24: ...0 PX battery pack Charging time Operating time 3 7 V 250 mAh Lithium Polymer 3 hrs 10 hrs Operating temperature range 0 C to 40 C Storage temperature range 10 C to 70 C Passive noise attenuation 25 dB...

Page 25: ...luetooth to deliver CD quality audio ensuring you are getting the most from your wireless listening experience In order to deliver two channel digital sound within the Bluetooth A2DP profile audio com...

Page 26: ...of 92 dB for 16 bit audio and 120 dB for 24 bit audio The overall framework of apt X ensures a high degree of resilience to random bit errors with the bit error response well matched to the audi tory...

Page 27: ...s special waste or return them to your specialist dealer In order to protect the environment only dispose of exhausted batteries CE Conformity R TTE Directive 1999 5 EC EMC Directive 2004 108 EC Low V...

Page 28: ...Sennheiser electronic GmbH Co KG Am Labor 1 30900 Wedemark Germany www sennheiser com Publ 12 11 546141 A01...

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