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White canal earbuds in a matching charging case

Sennheiser

Sennheiser MOMENTUM True Wireless 3 White Canal Earphones

SKU CH-8503-6GX3G

True wireless canal earphones with hybrid adaptive ANC, 7 mm dynamic drivers and 28 hours total battery life

  • Driver size7 mm, TrueResponse, dynamic, closed-back
  • Frequency range5 Hz-21 kHz
  • Headphone style<0.08% (1 kHz / 94 dB SPL)
  • Audio sensitivity107 dB SPL (1 kHz / 1 mW)
  • Wearing styleCanal
  • Noise cancellationHybrid Adaptive ANC
  • TrueResponse dynamic driver delivers high-fidelity sound from 5 Hz to 21 kHz
  • Hybrid adaptive ANC automatically adjusts to your environment for distraction-free listening
  • Three microphones per earbud ensure clear calls and voice-assistant interaction
  • Transparency mode restores ambient sound instantly with a touch
  • 7 hours earbud playtime extends to 28 hours with the charging case

TrueResponse 7 mm driver earbuds

The Sennheiser MOMENTUM True Wireless 3 earphones use a 7 mm dynamic TrueResponse transducer in a closed-back canal design. They deliver a frequency response of 5Hz-21KHz with total harmonic distortion below .08% at 1 kHz and 94 dB SPL. Sensitivity is rated at 107 dB SPL at 1 kHz per mW. The white finish distinguishes this variant.

Hybrid Adaptive ANC with 28-hour case

Hybrid Adaptive ANC automatically adjusts attenuation to the surrounding noise level for sustained immersion. Built-in lithium-ion cells provide 7 hours of playback from the earbuds and a total of 28 hours when combined with the charging case. Three microphones per earbud support clear voice pickup with a 100Hz-10KHz response. Transparency mode restores ambient sound on demand.

aptX Adaptive codec and Bluetooth source required

Verify that your playback device supports Bluetooth and the aptX Adaptive codec to access the full resolution pipeline. The canal fit relies on a secure seal for both bass response and noise-cancelling performance. Buyers who need on-ear comfort or longer single-charge endurance should consider alternative form factors. Part number 509181 confirms the exact model.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $137.99
Pricier than about 90% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameSennheiser
Model nameMOMENTUM True Wireless 3
Part number509181
Product typeIn-Ear
Product colorWhite
Audio & video
Driver size7 mm, TrueResponse, dynamic, closed-back
Frequency range5 Hz-21 kHz
Headphone style<0.08% (1 kHz / 94 dB SPL)
Audio sensitivity107 dB SPL (1 kHz / 1 mW)
Wearing styleCanal
Noise cancellationHybrid Adaptive ANC
Mic frequency response100 Hz-10 kHz
Connectivity
Wireless technologyBluetooth
Power
Battery packBuilt-in Lithium-Ion rechargeable batteries
Run time(earbuds): 7 hrs
Operating time (charging case): 28 hrs
Size & build
Product weight(earbuds): 0.2 oz
Weight (charging case): 2.34 oz

Questions about this item

How long can I listen with the Hybrid Adaptive ANC active before the earbuds need a recharge?

The earbuds provide 7 hours of operating time, and the charging case extends total use to 28 hours.

What does the aptX Adaptive codec require on the source device to deliver high-resolution wireless audio?

The source must support aptX Adaptive; the earbuds handle the rest with their TrueResponse drivers.

Can the three microphones on each earbud pick up my voice clearly when paired with an older smartphone?

Yes, the 100 Hz – 10 kHz microphone response works with any Bluetooth audio device for calls and voice assistants.

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