Over-Ear
Sennheiser HDB 630
87Outstanding
$450
Full review dataSennheiser HDB 630 vs STAX SR-Lambda Pro: which should you buy?
On aggregated review scores the Sennheiser HDB 630 comes out ahead with an HearWiki score of 87. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Sennheiser HDB 630 - Outstanding overall at around $450.
Over-Ear
STAX SR-Lambda Pro
82Great
$350
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Sennheiser HDB 630
Sound9.0
Noise cancelling8.0
Battery9.0
Calls7.0
Value7.5
STAX SR-Lambda Pro
Sound8.5
Value7.0
Specifications
| Spec | Sennheiser HDB 630 | STAX SR-Lambda Pro |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $450 | $350 |
| HearWiki score | 87 / 100 · Outstanding | 82 / 100 · Great |
| Released | 2025 | - |
| Audio | ||
| Driver | dynamic | Electrostatic |
| Driver size | 42 mm | - |
| Drivers per side | 1 | 2 |
| Frequency response | 6 Hz - 40 kHz | 8 Hz - 35 kHz |
| Sound signature | - | Neutral |
| Impedance | 480 Ω | 122000 Ω |
| Sensitivity | 105 dB/mW | 100 dB/mW |
| Wireless | ||
| Bluetooth | 5.2 | - |
| Codecs | SBC, AAC, aptX, aptX HD, aptX Adaptive | - |
| Multipoint pairing | Yes | No |
| Battery | ||
| Battery life (ANC on) | 60 h | - |
| Full charge time | 120 min | - |
| Quick charge | 10 min = up to 7 h | - |
| Wireless charging | No | No |
| Features | ||
| Active noise cancelling | Yes | No |
| ANC type | hybrid | none |
| Transparency mode | Yes | No |
| Companion app | Yes | No |
| Custom EQ | Yes | No |
| Wear detection | Yes | No |
| Controls | touch | none |
| Voice assistant | Yes | - |
| Design | ||
| Weight | 311 g | 340 g |
| Water resistance | none | - |
| Foldable | - | No |
| Detachable cable | - | No |
| USB-C | Yes | No |
| Calls | ||
| Microphones | 4 | - |
What reviewers said
Sennheiser HDB 630
The Sennheiser HDB 630 is a premium wireless over-ear headphone that prioritizes audio fidelity above all else, pairing a detailed, balanced sound with strong adaptive noise cancellation. It offers an extensive feature set, including multi-device pairing, a transparent mode, and support for high-resolution aptX codecs via its included USB dongle. While its sound quality is a clear standout, its high impedance and specific tuning may not suit every listener, and its premium price reflects its niche focus on audiophiles who want wireless convenience without sacrificing performance.
- Pro:Excellent, balanced sound with a musical midrange
- Pro:Strong adaptive noise cancellation with transparency mode
- Pro:Long 60-hour battery life and quick charge support
- Con:High 480-ohm impedance may require more power than typical phones
- Con:Noticeable sonic quirks in certain frequency ranges
- Con:Premium price tag for a niche audience
STAX SR-Lambda Pro
The STAX SR-Lambda Pro is a classic electrostatic headphone that delivers a remarkably transparent and detailed neutral sound, with exceptional speed and resolution that highlights its high-end heritage. It requires a dedicated electrostatic amplifier, making it a specialized choice for audiophiles seeking maximum clarity rather than casual listeners. The lightweight design is comfortable, but its wired-only nature and lack of modern conveniences reflect its age and niche positioning.
- Pro:Exceptional detail retrieval and transient speed
- Pro:Neutral, highly accurate tonal balance
- Pro:Very lightweight and comfortable for long sessions
- Con:Requires expensive dedicated electrostatic amplifier
- Con:No detachable cable or modern connectivity options
- Con:Lacks any controls, app support, or wireless features
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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