Sennheiser HDB 630 review: A sonic marvel with room for improvement

Sennheiser's HDB 630 headphones aim for high-resolution audio on the go with a new acoustic platform. They include a USB-C dongle to transmit up to 24-bit/96kHz audio wirelessly, offering a taste of audiophile sound. The design, similar to the Momentum 4, is criticized for its less premium feel despite the high price. The headphones feature touch controls, including a unique pinch gesture for Adaptive ANC adjustments. They boast long battery life, up to 60 hours, and comfortable ear pads for extended listening. Sound quality is good, especially with the dongle, but the "neutral" tuning may require EQ adjustments for some genres. The included BTD 700 dongle unlocks high-quality streaming and offers advanced features like aptX Adaptive and Lossless. The Sennheiser Smart Control Plus app allows robust EQ customization and Crossfeed settings. ANC performance is good, and call quality is improved by the dongle. The HDB 630 faces competition from other high-end headphones like the Bose, Sony, and AirPods Max.