Sennheiser HD 660S2
Sony ULT WEAR WHULT900N/B
What Buyers Say
Sennheiser HD 660S2
The Sennheiser HD 660S2 is praised as a significant upgrade over its predecessor, with improved bass and a warm, organic sound signature. Users highlight its excellent midrange realism, wide soundstage, and comfort, though they note it requires a dedicated amp and DAC to reach full potential. Overall, it is considered a top-tier choice for audiophiles seeking detailed, fatigue-free listening.
Pros
- Improved bass over predecessor
- Warm and organic sound signature
- Excellent midrange realism
- Wide soundstage
- Comfortable and lightweight
Cons
- Requires dedicated amp and DAC
- High impedance (300 ohms)
- Open-back design leaks sound
- Pricey investment
Sony ULT WEAR WHULT900N/B
The Sony ULT WEAR headphones deliver impressive noise cancellation and powerful bass via the ULT button, with many users praising the long battery life and comfortable fit. Sound quality improves significantly after using the companion app to customize the EQ, though some find the default sound muddy and the ULT bass boost overwhelming. A few long-term users report scratchy audio after two years, and the headphones are noted as bulky for some.
Pros
- Excellent noise cancellation
- Powerful bass with ULT button
- Long battery life (up to 30 hours)
- Comfortable for extended wear
- Customizable EQ via app
Cons
- Default sound is muddy without EQ
- ULT bass boost can be overwhelming
- Bulky design for some users
- Scratchy audio reported after 2 years
- Not ideal for gym use (fall off)
Scores
Specifications
| Sennheiser HD 660S2 | Sony ULT WEAR WHULT900N/B | |
|---|---|---|
| Design | ||
| Form Factor | over-ear | over-ear |
| Open/Closed | open | closed |
| Foldable | ✗ | ✓★ |
| Weight | 0.50 kg | 0.26 kg★ |
| Ear Cushion | velour | thermo-foaming |
| Headband | Aluminum, Plastic, Steel | — |
| Audio | ||
| Driver Type | dynamic | dynamic |
| Driver Size | 38 mm | 40 mm★ |
| Freq Min | 8 Hz | 5 Hz★ |
| Freq Max | 42 kHz★ | 20 kHz |
| Impedance | 300 Ω | 314 Ω |
| Sensitivity | 104 dB | 110 dB★ |
| Hi-Res Audio | — | ✓★ |
| Codecs | — | AAC, LDAC, SBC |
| Noise Control | ||
| ANC | ✗ | ✓★ |
| ANC Type | — | adaptive |
| Transparency | — | ✓★ |
| Connectivity | ||
| Wireless | ✗ | ✓★ |
| Bluetooth | — | 5.2★ |
| Profiles | — | A2DP, AVRCP, HFP, HSP |
| Multipoint | — | ✓★ |
| Wired Connector | 6.35mm | 3.5mm |
| Detachable Cable | ✓ | ✓ |
| Cable Length | 1.7999999523162842 m | 1.2000000476837158 m |
| Range | — | 9.800000190734863 m★ |
| Battery | ||
| Battery Life | — | 30 hrs★ |
| Charge Time | — | 3.5 hrs★ |
| Fast Charging | — | 3-minute charge provides 90 minutes of extra playtime |
| Charging | — | USB-C★ |
| Microphone | ||
| Microphone | — | ✓★ |
| Mic Count | — | 4★ |
| NC Mic | — | ✓★ |
| Boom Mic | ✗ | ✗ |
| Detachable Mic | — | ✗ |
| Features | ||
| Voice Assistant | — | Google Assistant, Amazon Alexa |
| Touch Controls | — | ✓★ |
| App | — | Sony Headphones Connect |
| Gaming Mode | — | ✗ |
Pros & Cons
Sennheiser HD 660S2
- Strong user sentiment (99th percentile)99th %ile
- Strong build (95th percentile)95th %ile
- Strong social proof (92nd percentile)92nd %ile
- Strong sound (81st percentile)81st %ile
- Below average comfort (10th percentile)10th %ile
- Below average mic (16th percentile)16th %ile
- Below average anc (32nd percentile)
Sony ULT WEAR WHULT900N/B
- Strong connectivity (99th percentile)99th %ile
- Strong anc (98th percentile)98th %ile
- Strong sound (96th percentile)96th %ile
- Strong social proof (89th percentile)89th %ile
Pricing
Sony ULT WEAR WHULT900N/B offers 3.4x better value for money
Verdict
Scores 94 overall, wins 7 of 7 usage categories and 19 of 38 specs.
