Over-Ear
Haylou FlowLoop S33
68Good
$188
Full review dataHaylou FlowLoop S33 vs Sennheiser MOMENTUM 4 Wireless: which should you buy?
On aggregated review scores the Sennheiser MOMENTUM 4 Wireless comes out ahead with an HearWiki score of 85. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Sennheiser MOMENTUM 4 Wireless - Outstanding overall at around $234.
Over-Ear
Sennheiser MOMENTUM 4 Wireless
85Outstanding
$234
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Haylou FlowLoop S33
Sound7.0
Noise cancelling6.5
Battery9.0
Calls6.5
Value7.5
Sennheiser MOMENTUM 4 Wireless
Sound8.5
Noise cancelling8.0
Battery9.5
Calls7.5
Value8.5
Specifications
| Spec | Haylou FlowLoop S33 | Sennheiser MOMENTUM 4 Wireless |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $188 | $234 |
| HearWiki score | 68 / 100 · Good | 85 / 100 · Outstanding |
| Released | 2026 | 2022 |
| Audio | ||
| Driver | 40 mm dynamic | 42mm dynamic drivers |
| Driver size | 40 mm | 42 mm |
| Drivers per side | 2 | 1 |
| Frequency response | 20Hz-20kHz | 6 Hz - 22,000 Hz |
| Impedance | - | 60 Ω |
| Sensitivity | 97 dB/mW | 106 dB/mW |
| Wireless | ||
| Bluetooth | 6.0 | 5.2 |
| Bluetooth version | 6.0 | 5.2 |
| Codecs | LDAC, SBC | SBC, AAC, aptX, aptX Adaptive |
| Multipoint pairing | Yes | Yes |
| Latency | 65 ms | - |
| Wireless range | 10 m | - |
| Battery | ||
| Battery life | 100 h | 60 h |
| Battery life (ANC on) | 70 h | - |
| Full charge time | 180 min | 120 min |
| Quick charge | - | 5 min = up to 4 h |
| Wireless charging | No | No |
| Features | ||
| Active noise cancelling | Yes | Yes |
| ANC type | hybrid | adaptive |
| Transparency mode | Yes | - |
| Companion app | Yes | - |
| Custom EQ | Yes | - |
| Design | ||
| Weight | 250 g | 293 g |
| Water resistance | - | none |
| USB-C | Yes | Yes |
| Calls | ||
| Microphones | 5 | 4 |
| Call noise reduction | ENC | - |
What reviewers said
Haylou FlowLoop S33
The Haylou FlowLoop S33 is an over-ear wireless headphone that prioritizes extended listening sessions, with a battery life reaching up to 100 hours without noise cancellation and 70 hours with it active. It features hybrid ANC, LDAC support, and a lightweight design, making it a solid budget-friendly pick for those who value stamina and comfort over premium extras. While it includes Bluetooth 6.0 and a transparency mode, it lacks multipoint connectivity, which may be a drawback for multitaskers.
- Pro:Exceptional battery life of up to 100 hours
- Pro:Hybrid ANC with transparency mode for versatile listening
- Pro:Supports high-resolution LDAC codec for better audio quality
- Con:No multipoint connection for switching between devices
- Con:Charging takes about 3 hours, which is relatively slow
- Con:Limited frequency response range compared to some rivals
Sennheiser MOMENTUM 4 Wireless
The Sennheiser MOMENTUM 4 Wireless are premium over-ear headphones that deliver a well-rounded experience, highlighted by exceptional battery endurance and strong overall performance. They pack effective noise cancellation, support for high-quality wireless audio, and a comfortable design, making them a versatile choice for daily use and travel. While not the absolute leaders in any single category, their combination of features and usability offers excellent value at their price point.
- Pro:Outstanding battery life of up to 60 hours
- Pro:Comfortable fit for extended listening sessions
- Pro:Solid active noise cancellation performance
- Con:Sound quality is very good but not class-leading
- Con:Design feels less premium compared to some rivals
- Con:ANC is effective but not the absolute best available
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
Compare something else
Swap either side out, or start again from the picker.