New Delhi, Dec. 16 -- When I first heard Sennheiser was launching a new pair of ANC headphones in November, I was genuinely curious to see what they were aiming for this time. I have lived with the HDB 630 for a little over 30 days, using it the way most people will. It has handled long desk sessions, quick walks outside with traffic noise always hanging around, and those evenings when you just want music playing in the background while you get through small tasks. I kept going back to it late at night too, when the house finally went quiet and a good pair of headphones had nowhere to hide. And yes, it comes at a premium price, but it does a few things better than the Momentum 4, especially when the mix gets busy and you still want it to ...