Apple AirPods 2nd Gen vs Sennheiser HD 660S2
The Verdict
Comparing these reveals fundamentally different product categories despite both being headphones. AirPods 2nd Gen excel as portable true wireless earbuds with the H1 chip enabling seamless Apple ecosystem integration, automatic ear detection, and 5-hour per charge battery life plus 24 hours total with case via Lightning charging. Sennheiser HD 660S2 are premium wired over-ear audiophile headphones featuring 42mm dynamic drivers, 300-ohm impedance, handmade German construction, and replaceable components,designed for dedicated amp/DAC setups rather than mobile use. AirPods prioritize convenience and ecosystem convenience; the 660S2 prioritizes sound fidelity for serious listeners. Choose AirPods for everyday wireless convenience and Apple device synergy. Select HD 660S2 if you value reference-grade audio quality and have adequate amplification equipment. These serve entirely different use cases.
Who Should Buy
Buy the Apple AirPods 2nd Gen if…
- →Iconic design and effortless Apple ecosystem integration
- →H1 chip enables hands-free Hey Siri voice commands
- →Lightweight and comfortable for extended wear
Buy the Sennheiser HD 660S2 if…
- →Reference-grade sound with improved bass over the original HD 660S
- →Both 6.35mm and 4.4mm balanced cables included in the box
- →Open-back design creates a wide, natural soundstage
Category Scores
Pros & Cons
Apple AirPods 2nd Gen
Pros
- Iconic design and effortless Apple ecosystem integration
- H1 chip enables hands-free Hey Siri voice commands
- Lightweight and comfortable for extended wear
- Quick and reliable pairing with all Apple devices
- Affordable entry point into the AirPods lineup
Cons
- No water or sweat resistance rating — risky for workouts
- 5-hour battery life is below average by modern standards
- No noise cancellation or transparency mode
- One-size-fits-all design doesn't suit every ear shape
- Lightning charging only — no USB-C
Sennheiser HD 660S2
Pros
- Reference-grade sound with improved bass over the original HD 660S
- Both 6.35mm and 4.4mm balanced cables included in the box
- Open-back design creates a wide, natural soundstage
- Lightweight at 260 g for an audiophile over-ear
- Replaceable parts make it a long-term investment
Cons
- 300-ohm impedance requires a dedicated amp/DAC to drive properly
- Wired only — no Bluetooth option
- Open-back leaks significant sound — not for shared spaces
- $499 is steep for headphones that need additional equipment
Full Specifications
| Spec | Apple AirPods 2nd Gen | Sennheiser HD 660S2 |
|---|---|---|
| Active Noise Cancelling | ||
| Type | in-ear | over-ear |
| Weight | 4 g (each) | 260 g |
| Battery | ||
| Battery life | 5 hrs (earbuds), 24 hrs total with case | N/A (wired) |
| Charging | Lightning (wireless charging case optional) | N/A |
| Drivers | Apple-designed driver | 42mm dynamic transducer, 300 ohm impedance |
| Features | H1 chip with Hey Siri support, Automatic ear detection, Seamless Apple device switching, Quick pairing via proximity | Open-back audiophile design, 300-ohm impedance for dedicated amp/DAC use, Balanced 4.4mm Pentaconn cable included, Replaceable ear pads and cables, Handmade in Germany |
| Connectivity | ||
| Wired option | ||
| Codecs | AAC, SBC | |
| Bluetooth | 5.0 | None (wired only) |
| Multipoint | ||
| Water Resistance | None | None |
Related Comparisons
This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in headphones, see all Apple products or all Sennheiser products. View full details for the Apple AirPods 2nd Gen or the Sennheiser HD 660S2.