Features

Overview: The Sennheiser Momentum 4 Wireless (M4AEBT) headphones have a closed circum-aural (over-the-ear) design with Bluetooth 5.2 technology and Hybrid Adaptive ANC (Active Noise Cancellation). The headphones come with a straight connecting cable for those times when you can't go wireless, a USB-C charging cable for the internal battery, and a semi-hard zippered storage case. The Momentum 4 Wireless headphones come in black, white, and graphite.

Drivers: The Momentum 4 Wireless are equipped with 42mm Dynamic drivers to deliver Sennheiser's Signature Sound. With crisp, deep bass and brilliant highs, you'll hear your favorite music in great detail.

Bluetooth: The Momentum 4 Wireless headphones have Bluetooth version 5.2 which pairs to your phone or audio device in seconds. You can make and receive phone calls and stream audio wirelessly in a range of up to 33', depending upon environmental conditions. The headphones have the following profiles -- HFP, AVRCP, and A2DP.

Onboard Controls: The Momentum 4 has a single Multi-function button to turn the headphones on/off, pair the headphones with a Bluetooth device, and activate your chosen Voice Assistant. The right ear cup features a large touch-sensitive panel that lets you control various features using gesture controls, including tapping, horizontal and vertical swipes, and stretch and pinch actions.

Auto On/Off: The headphones will automatically power on and off as you unfold or fold the ear cups. This helps save battery power when you are finished listening without having to manually turn off the headphones. Folding the left ear cup in toward the headband, and then the right, turns off the headphones. Fully unfolding the ear cups turns the headphones on.

Smart Pause: The Momentum 4 Wireless have a sensor that can detect when the headphones are worn or taken off. The Smart Pause function automatically pauses your music when you remove the headphones, and resumes playback when you put them back on.

aptX Adaptive: With aptX Adaptive audio coding, the Momentum 4 Wireless headphones deliver clean, crisp HD-quality audio. aptX Adaptive offers a dynamic Low Latency (LL) mode to help keep the audio and video perfectly in sync. The bit rate adjusts to provide seamless audio and fewer dropouts. If your Bluetooth audio source supports aptX, aptX LL, or aptX Adaptive, the headphones will automatically stream music wirelessly in aptX high-quality mode. If the device is not equipped with aptX or AAC (Advanced Audio Coding), the music will be streamed in the standard quality mode (SBC).

Active Noise Cancellation: The Momentum 4 Wireless headphones feature next-generation Hybrid Active Noise Cancellation (ANC). Four microphones, two outside the earcup and two inside the earcup, pick up ambient noise. The headphones cancel the ambient noise with an equal, but opposite, signal. ANC is most effective with low-frequency noise, such as engines and wind. On the headphones, you can turn ANC on or off, or using the touch pad, increase and decrease the levels of the ANC and Transparency Modes. You can also adjust the levels using the Sennheiser Smart Control app.

Transparency Mode: The Transparency Mode lets you stay aware of your surroundings while wearing the headphones. It lets you carry on conversations, listen to important announcements, or hear street noise and nearby traffic. On the headphones, you can simply turn Transparent Hearing on or off. In the Smart Control app, you can turn the feature on or off, and select whether or not you want to keep music playing when the feature is activated.

Smart Control App: The Sennheiser Smart Control app lets you control and personalize the Momentum 4 Wireless headphones to your needs and convenience. In addition to configuring the Active Noise Cancellation and Transparency Mode features (described above), the app offers an equalizer for adjusting the bass, midrange, and treble to your liking. Using your smartphone's touch screen, you can make adjustments to the sound by moving an onscreen dot up or down to raise or lower the selected frequencies. The latest settings made in the app are stored in the headphones, and will be active the next time you use the headphones, whether you use the app or not. You can deactivate the EQ by touching the center dot on the EQ graph to "center" the settings. The Smart Control app also lets you turn on/off Smart Pause, which automatically pauses music playback when you remove the headphones, and resumes playback when you put them back on. The Smart Control app is available for iOS devices (requires Version 13.0 or later) and Android devices (requires Version 8.0 and up).

Rechargeable Battery: The Momentum 4 Wireless headphones are powered by an internal, 3.7VDC 700 mAh Lithium-Polymer rechargeable battery. The battery charges in about 2 hours via USB power (800mA max) using the supplied USB cable from a laptop, an AC-powered USB charging port, or a mobile 12-volt USB charging port. A 5-minute Quick Charge gives you up to 4 hours of playtime. A fully-charged battery provides up to 60 hours of music playback using both Bluetooth and Active Noise Cancellation. You can keep track of the remaining battery life through the multi-color LED and voice prompts, as well as on your connected smartphone or tablet.

Voice Assistant: The Momentum 4 Wireless headphones is compatible with the Voice Assistant that is available on your mobile device, including Google Assistant and Siri. You can set up your Voice Assistant using the Smart Control app, and activate it using the Multi-Function button on the right earcup.

Audio Cable: If you can't listen to the headphones wirelessly, you can still enjoy your music through a wired connection. An attachable 49" straight audio cable is provided with a right-angled 3.5mm mini-plug. As long as the battery is charged, you can still take advantage of the Active Noise Cancellation when using the headphones with the audio cable. The headphone's music/phone controls and Voice Assistant functions are disabled when the audio cable is used.

Specifications:

• Frequency Response: 6Hz - 22kHz (-10dB)
• Impedance: 60Ω passive, 470Ω active
• Total Harmonic Distortion (THD): <0.3% (1 kHz, 100 dB SPL)
• Sensitivity: 106dB SPL (1 kHz, 0 dB FS)
• Dimensions:
  • Ear Cups: Width 3.284", Height 3.856", Depth 1.823"
  • Weight: 10.45 ounces (w/o cable)