Sennheiser HD 660S2
Sennheiser
57 Overall Score
vs
Marshall Monitor III A.N.C.
Marshall
79 Overall Score
What Buyers Say
Sennheiser HD 660S2
95 out of 100 low confidence 5 reviews
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
Sound quality 5
Bass improvement 3
Midrange realism 2
Soundstage 2
Comfort 2
Amp dac requirement 2
Marshall Monitor III A.N.C.
No customer feedback yet
Scores
Budget
Music
Gaming
Studio
Commute
Work
Calls
Specifications
| Sennheiser HD 660S2 | Marshall Monitor III A.N.C. | |
|---|---|---|
| Design | ||
| Form Factor | over-ear | over-ear |
| Open/Closed | open | open |
| Foldable | ✗ | ✓★ |
| Weight | 0.50 kg | 0.25 kg★ |
| Ear Cushion | velour | — |
| Headband | Aluminum, Plastic, Steel | — |
| Audio | ||
| Driver Type | dynamic | dynamic |
| Driver Size | 38 mm★ | 32 mm |
| Freq Min | 8 Hz★ | 20 Hz |
| Freq Max | 42 kHz★ | 20 kHz |
| Impedance | 300 Ω | 35 Ω |
| Sensitivity | 104 dB | 117 dB★ |
| Codecs | — | AAC, LC3, SBC |
| Noise Control | ||
| ANC | ✗ | ✓★ |
| ANC Type | — | Active Noise Cancelling |
| Transparency | — | ✓★ |
| Connectivity | ||
| Wireless | ✗ | ✓★ |
| Bluetooth | — | 5.3★ |
| Wired Connector | 6.35mm | 3.5mm |
| Detachable Cable | ✓ | ✓ |
| Cable Length | 1.7999999523162842 m | 1.2192000150680542 m |
| Range | — | 9.100000381469727 m★ |
| Battery | ||
| Battery Life | — | 70 hrs★ |
| Charge Time | — | 2.5 hrs★ |
| Fast Charging | — | 15 Minutes for 12 Hours |
| Charging | — | USB-C★ |
| Microphone | ||
| Microphone | — | ✓★ |
| NC Mic | — | ✓★ |
| Boom Mic | ✗ | ✗ |
| Features | ||
| Voice Assistant | — | Siri, Google Assistant |
| Touch Controls | — | ✗ |
| App | — | Marshall Bluetooth |
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)
Marshall Monitor III A.N.C.
- Strong social proof (95th percentile)95th %ile
- Strong battery (94th percentile)94th %ile
- Strong connectivity (91st percentile)91st %ile
- Strong anc (90th percentile)90th %ile
Pricing
Sennheiser HD 660S20.118score per dollar
vs
Marshall Monitor III A.N.C.0.395score per dollar
Marshall Monitor III A.N.C. offers 3.3x better value for money
Verdict
Winner: Marshall Monitor III A.N.C.
Scores 79 overall, wins 7 of 7 usage categories and 13 of 32 specs.
