Sennheiser CX True Wireless EarbudsSennheiser CX True Wireless ANC In Ear Headphones Overview Experience superior sound without compromise with the Sennheiser CX True Wireless earbuds. Engineered with Sennheisers proprietary TrueResponse transducer, these earbuds deliver deep bass, natural mids, and clear, detailed treble for an exceptional listening experience across all genres. With an emphasis on comfort, durability, and ease of use, the CX True Wireless is built for everyday wear.