Audio-Technica ATH-M40x vs Bose QuietComfort 35 II
The Verdict
Audio-Technica ATH-M40x delivers professional-grade sound with a flat, neutral frequency response ideal for studio monitoring and critical listening, featuring 40mm drivers, foldable design, and two detachable cables at an exceptional $99 price point. Bose QuietComfort 35 II ($299) prioritizes lifestyle features with industry-leading active noise cancellation across three levels, 20-hour wireless battery life, Google Assistant integration, and Bluetooth 4.2 connectivity for everyday convenience. ATH-M40x excels in raw audio accuracy and value, suiting audiophiles and professionals who demand transparent sound without wireless complexity. QuietComfort 35 II justifies its premium through versatile ANC, wireless freedom, and seamless smart device integration for commuters and travelers. Choose ATH-M40x for honest studio sound and budget-conscious quality; select QuietComfort 35 II if ANC and wireless convenience justify tripling your investment.
Who Should Buy
Buy the Audio-Technica ATH-M40x if…
- →Flatter, more neutral tuning than the M50x — preferred by some engineers
- →Excellent value at $99 for professional-grade monitoring
- →Lightweight at 240 g for comfortable extended mixing sessions
Buy the Bose QuietComfort 35 II if…
- →Legendary Bose noise cancellation that set the industry standard
- →Extremely comfortable for all-day wear with plush ear cushions
- →20-hour battery life is solid for travel and commuting
Category Scores
Pros & Cons
Audio-Technica ATH-M40x
Pros
- Flatter, more neutral tuning than the M50x — preferred by some engineers
- Excellent value at $99 for professional-grade monitoring
- Lightweight at 240 g for comfortable extended mixing sessions
- Foldable and portable with detachable cables
- Reliable build quality trusted by studios globally
Cons
- Wired only — no wireless option
- Bass response is intentionally restrained — not for bass lovers
- Ear pads are thin and may need replacement for comfort
- Plastic build feels less premium than metal competitors
- No carrying case included
Bose QuietComfort 35 II
Pros
- Legendary Bose noise cancellation that set the industry standard
- Extremely comfortable for all-day wear with plush ear cushions
- 20-hour battery life is solid for travel and commuting
- Dedicated Google Assistant button for quick voice commands
- Foldable design and included hard case for portability
Cons
- Bluetooth 4.2 lacks modern codecs like aptX and LDAC
- Micro-USB charging port is outdated — not USB-C
- Sound quality is beaten by newer XM4 and XM5 models
- No multipoint Bluetooth for connecting two devices simultaneously
- Plastic build shows wear over time
Full Specifications
| Spec | Audio-Technica ATH-M40x | Bose QuietComfort 35 II |
|---|---|---|
| Active Noise Cancelling | ||
| Type | over-ear | over-ear |
| Weight | 240 g | 235 g |
| Battery | ||
| Battery life | N/A (wired) | 20 hrs (wireless with ANC), 40 hrs (wired with ANC) |
| Charging | N/A | Micro-USB, 2.25 hrs for full charge, 15 min = 2.5 hrs playback |
| Drivers | 40mm large-aperture dynamic driver | 40mm Bose custom drivers |
| Features | Flat, neutral frequency response for accurate monitoring, 40mm drivers with rare earth magnets and copper-clad aluminum wire, 90-degree swiveling ear cups, 2 detachable cables included, Foldable for portability, Circumaural design | Three levels of ANC (High, Low, Off), Google Assistant built-in (dedicated button), Bose AR (augmented reality) compatible, Volume-optimized EQ, Foldable design with carry case |
| Connectivity | ||
| Wired option | ||
| Codecs | AAC, SBC | |
| Bluetooth | None (wired only) | 4.2 with NFC pairing |
| Multipoint | ||
| Water Resistance | None | None |
Related Comparisons
This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in headphones, see all Audio-Technica products or all Bose products. View full details for the Audio-Technica ATH-M40x or the Bose QuietComfort 35 II.
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