Over-Ear
Focal Bathys
86Outstanding
$799
Full review dataFocal Bathys vs Sennheiser HD 660s: 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 660s
76Great
$405
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 660s
Sound8.0
Value7.0
Specifications
| Spec | Focal Bathys | Sennheiser HD 660s |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $799 | $405 |
| HearWiki score | 86 / 100 · Outstanding | 76 / 100 · Great |
| Released | 2022 | 2017 |
| Audio | ||
| Driver | 40mm Aluminium/Magnesium ‘M’-shaped dome | dynamic |
| Driver size | 40 mm | 38 mm |
| Drivers per side | 2 | 1 |
| Frequency response | 15Hz-22kHz | 10Hz-41kHz |
| Impedance | - | 150 Ω |
| Sensitivity | - | 104 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 | - |
| USB-C | Yes | - |
| 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 660s
The Sennheiser HD 660S is a wired, open-back dynamic headphone aimed at audiophiles seeking a neutral, reference-style sound. It delivers accurate vocals and instruments with a comfortable fit, but its high impedance and open-back design mean it needs a decent amp and is best used in quiet spaces. While not a huge leap over cheaper models, it offers good performance for its price, especially with suitable amplification.
- Pro:Accurate, neutral sound with clear vocals and instruments
- Pro:Comfortable for long listening sessions
- Pro:Works well with a wide range of music
- Con:Limited bass impact
- Con:Poor isolation, not suitable for noisy environments
- Con:Upper mids can sound harsh at high volumes or with bright recordings
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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