Over-Ear
Audio-Technica Ad900x
72Good
$300
Full review dataAudio-Technica Ad900x vs Sennheiser HD 650: which should you buy?
On aggregated review scores the Sennheiser HD 650 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 HD 650 - Outstanding overall at around $380.
Over-Ear
Sennheiser HD 650
85Outstanding
$380
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Audio-Technica Ad900x
Sound7.5
Noise cancelling0.0
Value7.0
Sennheiser HD 650
Sound9.0
Value7.5
Specifications
| Spec | Audio-Technica Ad900x | Sennheiser HD 650 |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $300 | $380 |
| HearWiki score | 72 / 100 · Good | 85 / 100 · Outstanding |
| Released | 2012 | - |
| Audio | ||
| Driver | dynamic | dynamic |
| Driver size | 53 mm | 42 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 5Hz-35kHz | 10Hz-41kHz |
| Impedance | 38 Ω | 300 Ω |
| Sensitivity | 103 dB/mW | 99.8 dB/mW |
| Sensitivity (dB/Vrms) | - | 103 |
| Wireless | ||
| Multipoint pairing | No | No |
| Features | ||
| Active noise cancelling | No | No |
| Controls | - | buttons |
| Design | ||
| Weight | 265 g | 260 g |
| Foldable | - | No |
| Detachable cable | No | Yes |
| USB-C | No | No |
| Balanced connection | - | Yes |
What reviewers said
Audio-Technica Ad900x
The Audio-Technica AD900X is an open-back, over-ear headphone that prioritizes a spacious, airy soundstage and lightweight comfort over isolation or portability. It offers clean, detailed audio with extended highs and is easy to drive, though its plastic construction and lean bass response may not suit everyone. Best enjoyed in quiet settings, it serves as a solid entry point into open-back listening.
- Pro:Very lightweight and comfortable for long sessions
- Pro:Wide, airy soundstage with detailed highs
- Pro:Easy to drive without a dedicated amplifier
- Con:Open-back design offers little isolation and leaks sound
- Con:Build uses mostly plastic materials
- Con:Bass and mids can sound thin
Sennheiser HD 650
The Sennheiser HD 650 is a wired, open-back dynamic headphone built for serious home listening. It delivers a natural, detailed sound with a comfortable fit, though its sub-bass rolloff and bulky design limit it to stationary use rather than portable or active scenarios. Its replaceable cable and balanced connection option add to its appeal for audiophiles.
- Pro:Excellent clarity and natural tonal balance
- Pro:Very comfortable for long listening sessions
- Pro:Detachable cable and balanced output support
- Con:Noticeable sub-bass rolloff
- Con:Not portable or suitable for active use
- Con:High impedance requires a dedicated amplifier
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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