Over-Ear
Focal Bathys
86Outstanding
$799
Full review dataFocal Bathys vs Sennheiser HD 660s2: which should you buy?
On aggregated review scores the Focal Bathys comes out ahead with an HearWiki score of 86. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Focal Bathys - Outstanding overall at around $799.
Over-Ear
Sennheiser HD 660s2
78Great
$480
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Focal Bathys
Sound9.5
Noise cancelling7.5
Battery8.5
Value7.0
Sennheiser HD 660s2
Sound8.5
Value7.0
Specifications
| Spec | Focal Bathys | Sennheiser HD 660s2 |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $799 | $480 |
| HearWiki score | 86 / 100 · Outstanding | 78 / 100 · Great |
| Released | 2022 | 2023 |
| Audio | ||
| Driver | 40mm Aluminium/Magnesium ‘M’-shaped dome | dynamic |
| Driver size | 40 mm | 38 mm |
| Drivers per side | 2 | 1 |
| Frequency response | 15Hz-22kHz | 8Hz - 41.5kHz |
| Impedance | - | 300 Ω |
| Sensitivity | - | 100 dB/mW |
| Sensitivity (dB/Vrms) | - | 104 |
| Wireless | ||
| Bluetooth | 5.1 | - |
| Bluetooth version | 5.1 | - |
| Codecs | AAC, aptX, aptX Adaptive, SBC | - |
| Multipoint pairing | Yes | No |
| Battery | ||
| Battery life | 30 h | - |
| Battery life (ANC on) | 30 h | - |
| Quick charge | 5 hours in 15 minutes | - |
| Wireless charging | No | - |
| Features | ||
| Active noise cancelling | Yes | No |
| ANC type | hybrid | - |
| Transparency mode | Yes | - |
| Voice assistant | Google Assistant, Amazon Alexa | - |
| Design | ||
| Weight | 350 g | 260 g |
| Water resistance | none | - |
| Detachable cable | - | Yes |
| USB-C | Yes | No |
| Balanced connection | - | Yes |
| Calls | ||
| Microphones | 8 | - |
What reviewers said
Focal Bathys
The Focal Bathys are premium wireless over-ears that blend high-fidelity audio with everyday convenience. They feature adaptive ANC, a USB-C DAC mode for hi-res wired listening, and support for aptX Adaptive, making them a top pick for sound-focused users who also want wireless flexibility. While their noise cancellation is solid but not the absolute best in class, their impressive battery life and versatile connectivity options stand out in the premium segment.
- Pro:Excellent sound quality with detailed, dynamic drivers
- Pro:USB-C DAC mode enables high-resolution wired audio
- Pro:Strong battery life, often exceeding rated figures in tests
- Con:ANC is competent but not class-leading
- Con:High price point limits accessibility
- Con:Real-world wireless endurance may fall short of claims in some scenarios
Sennheiser HD 660s2
The Sennheiser HD 660S2 is an open-back, dynamic driver headphone that refines the classic 600-series formula with a warmer, more extended low end and improved imaging. While it excels with high-impedance amplifiers and offers a comfortable, detailed listening experience, it demands a powerful source and may not satisfy bass-heavy listeners or those seeking a portable option. Its $599 price point positions it as a solid, but not class-leading, value for critical listening at home.
- Pro:Warm, extended bass response that adds body without overwhelming the mids
- Pro:Excellent imaging and soundstage for a dynamic open-back design
- Pro:Comfortable fit with plush earpads and a lightweight 260g build
- Con:Requires a strong amplifier to reach full potential due to 300-ohm impedance
- Con:Upper mids can sound recessed and may benefit from EQ
- Con:Initial clamp force is quite strong and needs time to loosen
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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