QuietComfort 35 II vs HDB 630
Audio · 2,000 owner opinions across both productsBuy the HDB 630.
Reddit's answer is the Sennheiser HDB 630. Buy it — if you value rich sound quality and want the most reliable wireless headphone on our board. The QuietComfort 35 II is a Risky Buy — buy only if you prioritize all-day comfort and reliable noise cancellation on a budget. Today's gap is $111: $379 for the QuietComfort 35 II against $490 for the HDB 630.
Built from 2,000 owner opinions across both products · 281 long-term reports · how we decide
What owners say
58% would buy againof 1,387 owners
First 6 months 55% → long-term 74%+19of 270 long-term owners
75% would buy againof 613 owners
First 6 months 79% → long-term 93%+14of 11 long-term owners
The QuietComfort 35 II's record runs 1,387 owners against 613 for the HDB 630 — weigh the thinner side accordingly.
What you’ll regret
No single component dominates
~1 in 3 long-term owner reports describe a failure — primarily the power switch, Bluetooth connectivity, and battery — typically surfacing between 12 and 73 months in. Of tracked warranty outcomes, 89 were resolved and 69 were not, so results lean resolved but a meaningful share lands outside coverage. Failure rate is about typical for wireless headphones: the category baseline is 24% serious failures versus 25% here.
Typically reported months 12–72 · 270 long-term owners
No recurring failure pattern measured.
These are the share of long-term owner reports that mention a failure, not the share of units that fail — owners with working units mostly don’t post.
Price and value
Gap today: $111 — QuietComfort 35 II is the cheaper buy.
Price links carry an affiliate tag. It never changes the verdict.
long-haul travel comfort and build durability matter more than pristine audio fidelity.
sound quality and a deliberate sound signature matter more to you than active noise cancellation.
Questions people ask about this matchup
Which is better, the QuietComfort 35 II or the HDB 630?
Reddit's answer is the Sennheiser HDB 630. Buy it — if you value rich sound quality and want the most reliable wireless headphone on our board. The QuietComfort 35 II is a Risky Buy — buy only if you prioritize all-day comfort and reliable noise cancellation on a budget.
Is the HDB 630 worth $111 more than the QuietComfort 35 II?
At $490 against $379 today, the HDB 630 costs 29% more and carries the stronger verdict (Strong Buy against Risky Buy).
QuietComfort 35 II full verdict →HDB 630 full verdict →All Audio verdicts →