The Bose QuietComfort 35 II are a bit older than the Sennheiser PXC 550-II, but Bose’s old dog can keep up with Sennheiser’s new pup. Shopping for audio products can be overwhelming. We want you to spend less time researching, and more time enjoying your music. Today, we’re comparing two popular noise cancelling headphones from reputable brands, to see which is best for your needs.
Bose QuietComfort 35 II vs Sennheiser PXC 550-II: Hardware and design
Both headsets are predominantly plastic, with ear cups that rotate flat and fold towards their respective headbands. The QC 35 II rely strictly on tactile buttons to control the headset, while Sennheiser integrates buttons and a touch pad on its headphones. The PXC 550-II are free of a power button, because rotating the right ear cup powers the headphones on and off.
Related: Best noise cancelling headphones
Bespectacled listeners are bound to enjoy either headset, though Bose made its name on comfort, and the QC 35 II edges out the Sennheiser PXC 550-II in that regard. Each headset has an over-ear design, but the QC 35 II afford greater clearance for large ears compared to the Sennheiser PXC 550-II. Bose and Sennheiser’s headphones both include removable memory foam ear pads, which makes them easy to clean or replace.
Which headphones have better software?
With the Sennheiser PXC 550-II, you can toggle between three noise cancelling settings: Mode 1, Mode 2, and off. In the Sennheiser Smart Control app, you can select which kind of ANC you want for Mode 1 (adaptive ANC or adaptive, anti-wind ANC). You can also toggle effects like smart pause, which automatically detects when the headphones are removed and pauses playback. The app also features call enhancement and smart assistant preference settings. Both applications let you create a custom EQ, but Sennheiser’s options are limited.
The Bose Connect+ app has a more pleasing UI than the Sennheiser Smart Control app.
The Bose Connect+ app lets you find your headphones, select your preferred voice assistant, and set up the action button. You can only assign one action to the Action button: either accessing your assistant, or cycling through ANC modes, but not both. If your smartphone has a native Google Assistant, you can access it via the multifunction button on the right ear cup. You can toggle between three levels of ANC: low, high, and off.
Bose’s app also lets you connect two headphones to one device and share audio. This is something iPhones and some Samsung devices already support, but other users will enjoy the streamlined way to share music.
Bose QuietComfort 35 II vs Sennheiser PXC 550-II: Noise cancelling
Learn more: How do noise cancelling headphones work?
The Sennheiser PXC 550-II does a slightly better job of cancelling sub-bass noise, which is the root of that jet engine hum and train car rattle. Bose does a better job of attenuating midrange noises, which is where vocal frequencies fall. If you need something for the office, the QC 35 II may be more effective for your needs.
However, in passive isolation performance (1kHz and above) the Sennheiser PXC 550-II runs circles around the QC 35 II, because of their tighter clamping force and dense memory foam pads. This means the PXC 550-II more effectively blocks out unpredictable sounds, like a roommate watching TV or loading the dishwasher.
Sennheiser supports more Bluetooth codecs
Anyone who alternates between iOS and Android devices will get more mileage with the Sennheiser PXC 550-II, because it supports a handful of high-quality Bluetooth codecs: AAC, aptX, and aptX Low Latency. All devices can stream high-quality audio to the Sennheiser headphones, which is in great contrast with the Bose QuietComfort 35 II, which only support AAC and SBC. As is well documented, AAC performs inconsistently across Android devices, because the operating system struggles to encode the codec properly.
Both headsets support wired audio for lossless playback.
The Bose QuietComfort 35 II uses Bluetooth 4.1 firmware, which is a bit dated compared to the PXC 550-II’s Bluetooth 5.0 firmware. The main difference between these two firmware versions is power efficiency, which the Sennheiser’s more impressive battery life demonstrates. Both headsets support multipoint connectivity, which is great for keeping an ear on incoming calls and notifications while watching TV.
The Sennheiser PXC 550-II have better battery life than the Bose QC 35 II
The Sennheiser PXC 550-II last 21 hours, 58 minutes on a single charge with ANC on its highest setting, which outperforms the Bose QuietComfort 35 II battery measurement of 15 hours, 46 minutes.
Both headsets require a microUSB cable to charge, and both support fast charging. Bose’s headset can offer 2.5 hours of playtime after just 15 minutes of charging, while Sennheiser’s provides 1.5 hours of playtime after a 10-minute charge. It takes just over two hours to charge Bose’s headphones, while it takes three hours to charge Sennheiser’s.
Both headsets have excellent sound quality
If you came for accurate sound quality, you’ll get it from either headset.
Sennheiser and Bose’s headphones reproduce neutral-leaning frequency responses, but per our objective measurements, the Sennheiser PXC 550-II are more accurate. This is visualized in the frequency charts: Bose’s headset amplifies sub-bass notes to an audible degree, while Sennheiser’s sound signature toes the line of platonic ideal (the dotted red line) until 1kHz.
Again, both headsets make music sound as the artists and audio engineers intended, so there’s no wrong choice. Plus, you can equalize either sound profile in the respective mobile app. These neutral sound signatures are great for tinkerers, and make it easy to adjust the output of certain frequencies without introducing harmonic distortion.
See also: Best Sennheiser headphones
Are Bose or Sennheiser’s headphones better for phone calls?
The microphone systems have very different frequency responses: Bose applies a high-pass filter to its microphone, so that low frequencies are de-emphasized. This may look strange but it’s strategic: manufacturers do this to reduce the proximity effect, which is when bass notes are amplified too much as a speaker gets close to the microphone.
Sennheiser applies a less intense high-pass filter to the PXC 550-II, which effectively transmits accurate audio without flirting with the proximity effect. Both headsets are well equipped with excellent mics to handle your personal and professional calls.
Give each demo a listen, and vote on your favorite microphone:
Bose QuietComfort 35 II microphone demo:
Sennheiser PXC 550-II microphone demo:
Bose QuietComfort 35 II vs Sennheiser PXC 550-II: which headset should you buy?
You can’t go wrong with either headset, but there are a few things that may sway you toward one over the other. Operating system-agnostic listeners will find the Sennheiser PXC 550-II to be a better tool, because of the vast high-quality Bluetooth codec support. However, if you want the most comfortable headphones and better software features, the Bose QuietComfort 35 II make more sense.
Another thing to consider: price. Typically both headsets retail for around $300 USD, but during Prime Day, they’ve both seen marked price reductions. The Sennheiser PXC 550-II cost just $219 USD, and the Bose QuietComfort 35 II cost just $199 USD. These prices are subject to change, and unless you absolutely need AAC support, the Bose QC 35 II are a compelling buy.
Spend big on the Sony WH-1000XM4 instead
The Sony WH-1000XM4 are also great for listeners willing to up their budgets. It’s also on sale $299 USD, which is a big price drop for a recent flagship. The sound signature isn’t nearly as neutral-leaning as either headset discussed today, but you can take granular control of the EQ in Sony’s Headphones Connect app.
Sony’s headset has much better noise cancelling performance than the Bose QC 35 II and Sennheiser PXC 550-II, and more software features too. Even simple hardware comforts like a USB-C port is built into the Sony headset.
Consider the Shure AONIC 50
Another great noise cancelling headset is the Shure AONIC 50. Shure’s headphones rarely go on sale, and the AONIC 50 are 25% off as a Prime Day audio deal (region-specific). If you want some of the best wireless audio quality, with vast Bluetooth codec support and USB-C passthrough audio functionality, get these comfortable headphones.
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