Sennheiser MOMENTUM True Wireless 4 with Adaptive Noise Cancellation (Open Box) backorder 0dB） 5Hz~80kHz（-3dB） 20Hz~80 kHz（-3dB） 20Hz~90kHz（-4dB）

0dB） 5Hz~80kHz（-3dB） 20Hz~80 kHz（-3dB） 20Hz~90kHz（-4dB） SNR ≥121dB（A-weighted） ≥122dB（dBA） ≥120dB ≥121dB（dBA） ≥119dB（over-ear headphone mode / A计权） Output impedance ≤1

And True Sound

By building a specific champer for the driver and calculating the best placement from the driver to the nozzel

rigid paper fibre cone and low resonance enclosures

and secondly

Sennheiser MOMENTUM True Wireless 4 with Adaptive Noise Cancellation (Open Box) backorder 0dB） 5Hz~80kHz（-3dB） 20Hz~80 kHz（-3dB） 20Hz~90kHz（-4dB）MOMENTUM True Wireless 4: Sound perfect everywhere True sound experiences Feel every bit of detail in the music thanks to the Sennheiser sound signature powered by TrueResponse driver technology. Our highly acclaimed sonic signature sound is refined with improved treble response and is now upgraded with a Lossless Bluetooth audio transmission next to 24 bit high resolution audio. The next generation hybrid adaptive ANC seamlessly adapts to ensure that