Bose QuietComfort Ultra vs Sennheiser HD 660S2
Verdict
Our overall take, at a glance
Key takeaways
- Bose QuietComfort Ultra leads Sennheiser HD 660S2 overall by 46 points (82 vs 36 out of 100).
- Bose QuietComfort Ultra stands out on Comfort & Build Weight: 253 g.
Bose QuietComfort Ultra leads overall
$429 at launch
Bose QuietComfort Ultra
82
Sennheiser HD 660S2
36
Why it stands out
- Comfort & Build Weight: 253 g
In-depth analysisAI
AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 2026.
Bose QuietComfort Ultra
The Bose QuietComfort Ultra Earbuds are premium wireless in-ear headphones designed for users seeking top-tier ambient noise reduction in a highly portable format. They aim to deliver the powerful active noise cancellation performance typically associated with the brand's larger over-ear headphones inside a compact, travel-friendly design.
Best for Blocking out low-frequency cabin noise during air travel and daily transitBest for Listeners wanting flagship-level noise isolation without the bulk of over-ear he
Pros
- Outstanding active noise cancellation that effectively isolates loud environments
- Comfortable and secure fit using stability bands and ear tips for long listening sessions
- Engaging spatial audio presentation with built-in immersive sound modes
Cons
- Premium pricing makes them a significant financial investment compared to standard wireless earbuds
- Standard charging case lacks integrated wireless charging functionality out of the box
Sennheiser HD 660S2
The Sennheiser HD 660S2 is a reference headphone model known for its clear, detailed, and warm sound signature. The design includes rich black velour earpads, and the headphones are noted for being lightweight. It provides impressive vocal clarity in the midrange.
Best for vocal trackingBest for classical musicBest for rock
Pros
- Features a fuller and warmer bass response than the original HD 660S
- The sound is described as clear, crisp, and detailed without sounding overly analytical
- Provides excellent detail and separation, with vocals prominently featured
- Is noted for being comfortable for long listening sessions due to light weight and earpads
Cons
- Can have a rather tight clamping force out of the box
- May not be suitable for genres requiring extremely thunderous bass (e.g., EDM or rap)
Value for Money
Which is the better deal for the price
Pre-filled with launch prices where known — enter today's price for an up-to-date check. Use the same currency for both.
Bose QuietComfort Ultra
Sennheiser HD 660S2
Physical Comparison
Weight, side by side
Bose QuietComfort UltraSennheiser HD 660S2
Sennheiser HD 660S2 is 7 g (3%) heavier than Bose QuietComfort Ultra.
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Detailed Specifications
The full spec sheet, side by side