These are not perfect as headphones go, but they are literally the nicest noise cancelling headphones that any amount of money can buy. They have their ups and downs. I'm going to talk in depth about each of these, but overall these are the best noise cancelling headphones money can buy, so even when it comes to their downsides, you can't do better. First, if you're a regular consumer, you'll be blown away by the sound quality. However, if you're an audiophile used to audiophile grade open back headphones like the Sennheiser HD800, these fall short of audiophile levels of sound quality. Let me explain why that is. Sound quality wise, the sound quality is overall spectacular, but it has two problems. Bass is way overemphasized, and the treble is rolled off. The treble issue is in my opinion the only really major flaw you have to deal with in these headphones. It's really a shame. Even with EQ, there's no good way to make up for the treble problem because the high end is just always a little lacking. Bass is massively overemphasized, but everyone seems to do that these days, and most people seem to love it. Thankfully, you can just lower the bass in the EQ and it works fine, but from an audiophile perspective it's still a mark against it. You can also raise the bass if you want to lose your hearing and cause brain damage from the thump. These things will thump so hard that it'll give you a concussion. Aside from those two downsides, instruments sound absolutely spectacular with amazing definition, separation, and clarity, it's just really unfortunate that they rolled off the treble. It'd be nice if the bass wasn't so overemphasized, but the bass at least is understandable since it seems to be what most people want. I will say however that the mid is absolutely spectacular, so there's that. Even at their best, if you're a real audiophile, these don't hold up to the sound quality of high end audiophile open back headphones by Sennheiser like the HD650 or HD800. These are consumer grade, very top end consumer grade, but they don't reach the heights of real audiophile territory. For most people though, these will blow you away. Noise cancelling wise, these are the best money can buy. I've tried other noise cancelling headphones, and these destroy everything that I've ever tried. It's a night and day difference in terms of the overall quality and effectiveness of the noise cancelling compared to other noise cancelling headphones. However, they're not totally perfect. I have a bunch of air filter fans running full blast all the time, and it reduces their volume by 90+%, but it's a little inconsistent. Some of the inconsistency comes from just how the headphones sit in my head, if I get them just right, it mutes probably 98% of the sound, but if they're just a little off, it drops to between 90-95%. Sometimes it just seems to work better than other times with no apparent explanation. 90% is still a ton of noise reduction. Be aware though that you can still hear things, they're just quiet. Like if you pass a fan while walking, you can still hear it, it's just quiet. There is sometimes a slight amount of pressure from the noise cancellation, but it's very minimal, and a lot of the time there's actually none. Next, we get into the real premium stuff. You're paying like $400 for this, so let's talk about what you're really paying for: the creature comforts and luxury that get overlooked at lower price ranges... For example, the case for these headphones is simply amazing. It feels extremely premium, it has a nice touch, it's light but durable, it has this lovely leathery material that is a joy to hold. It just feels like a million bucks. Even the zipper is nice! The internal layout is likewise spacious, protective and just overall very high quality. Same with the headphones themselves. As an object that you hold in your hand, these things simply feel incredible. They're unbelievably light, I don't know how they made it feel this light. The headband literally feels like a cloud, it almost melts in your hand. I've never felt anything like it. It is insanely soft with this beautiful smooth leather feeling, yet it doesn't collapse when you wear it. I don't even understand how that works, but it does. These are the most comfortable set of headphones I have ever put on my head by far. It feels like you're wearing a cloud. It's crazy. The clamp force is so low that I can wear these for hours and hours on end and they just feel insanely comfortable the entire time. Even just holding these headphones physically, they feel like a million bucks. Like they've got these buttery smooth moving collapsible cans, yet they feel solid and durable, and they have this lovely smooth feeling to them. These are the things you're really paying for when you pay $400. It's just all those little details and luxuries that really make it. They put a lot of luxury into the things outside the actual speakers, and it shows. They feel super premium in your hands, they're a beautiful shape, they're insanely comfortable to wear, they have this elegant simple design to them, and their case is outstanding. Seriously, if you hold the case and headphones of any of the other noise cancelling headphones in your hands, they just don't feel as nice as this. Overall, I really wish they hadn't rolled off the treble. That's its one major flaw. However, these are so good that I can't go back to anything else (other than my open back audiophile sennheisers for serious listening). These are like the ultimate casual headphones for every day use. Watching TV? Use these. Going on an airplane? Use these. Going to the gym? Use these. Going for a walk? Use these. Unless all you want to do is sit down and seriously listen to some high quality music in a quiet room with audiophile headphones, you should be using these. These are your ultimate every day use headphones. If you're a normal consumer who doesn't care about audiophile grade stuff, these will absolutely blow your mind. Even if you're an audiophile, you'll probably end up addicted to them for every day normal use. I'm kindof addicted to them myself, to be honest.

These are the best headphones I’ve ever purchased. They tick all the boxes for me. I’ve previously used the Sony XM4 and Beats Studio 3 Pro, but the Bose is simply a cut above them. Noise Cancellation: The best in the market—no other headphones come close. Lightweight and Comfortable: These headphones are incredibly light, with soft ear cups and a super-light headband that makes them a pleasure to wear. Sound Quality: Initially, I had issues with loudness and bass. However, after upgrading my phone to Bluetooth 5.3, I finally realized why these headphones are considered the best. The sound is crisp, allowing you to hear every single instrument in a track. The bass is amazing. As someone who mostly listens to hip-hop, these headphones deliver and more. Call Quality: The audio quality for calls is impeccable. Long-distance calls no longer feel like a hassle. Battery Life: The 24-hour battery life is more than sufficient for my needs. Portability: These headphones come with a compact case, which was a major requirement for me. They are easy to carry while traveling, unlike the Sony XM5. Controls: The minimal controls on the headphones make them easy to handle. Many of my friends prefer the clicky buttons from earlier Bose versions, but I’m all for this variant. Price: While the price is on the higher side, the quality is absolutely worth it. I managed to get them with a $100 discount. Look out for similar deals, as they pop up from time to time. Overall, I am absolutely satisfied and delighted with these headphones. You simply can’t go wrong with them.

Bottom Line Up Front: The Ultra upgrade is 100% worth the extra cost! I'm a long-time Bose headphone user (since the QC15). My last set, the QC35, was my "go to" set whenever I wanted to just escape and hear my favorite jams. Might sound silly but I'm preparing to move abroad, and I'm trying to get ride of my old micro-USB so I have fewer cords to deal with. I did some research on this new Ultra tech and was impressed with the possibilities. Still, if it wasn't for my excellent satisfaction with Bose, I'm not sure I would have laid down the big bucks (again) — but I'm sure glad I did! I just spent the afternoon listening to my favorite jams and a few new ones and was blown away. (By the way, I'm connecting to my Pixel Pro 8 via Bluetooth, streaming downloaded files and Amazon Prime Music.) The best way to describe the Ultra difference is that I hear vocals and instruments in songs that I never heard separately before. There is a clarity and depth that almost felt like I was listening live in person. I booster the bass setting in the Bose app (personal preference), and the speakers produce a deep, balanced sound. There's a reasonable safety feature somewhere along the way (on phone? in speakers?) that prevents me from blasting the sound too loudly, though I wish it could be 20% louder at the max. Probably better not to do that, I know. There's also feature where if you turn your head left or right, it kind of adjusts the sound. I'm not sure I have that working correctly, but the demo was also very impressive. Finally, the headphones feel good on my ears. No surprise there. We'll see how the material holds up over time! The carrying case also has a more deluxe, style look. I'm VERY glad that I made this purchase. Ultra is the way to go! Thanks Bose!!

Son los mejores auriculares que he tenido. Totalmente en otro nivel diferente a unos AirPods Pro, los bajos son excelentes, con unos medios y altos que necesitan tunearse un poco según cada gusto pero la firma de audio de fábrica ya es excelente per se. Se sienten de calidad, son super cómodos, y se ven muy sexys, me encantan!!.

Got this for my wife and it delivers perfect sound while keeping outside noise out, she loves it. She really loves the color as it's a more girly tone.

Okay so after a week, I think I can comment fully. These are so close to being perfect, but Bose decided to make some silly decisions which happen to contradict the purpose of hi-fi headphones. So I had to set Immersive Audio to "off". My S24 Ultra has Dolby Atmos and I find it works a lot better with that. It sounded like I had unwanted reverb and several layers of post-processing going on with both. It sounds more natural and true to the music's intended sound with both off, or using only Atmos. The sound quality is top tier. The vocals are clear as day, you can hear tonal (sub) and impulse (kick) bass separately, and the mids are pleasant and rich. Using the EQ to turn the treble up a little bit sounds great, and I'm usually more quick to turn bass levels up. I also find it sounds better with the mids turned down a bit. These headphones outperform my Galaxy Buds Pro 2s but only slightly due to the lack of 24-bit audio on the QCs. Update: I purchased a Creative BT-W5 to get AptX Adaptive working, and there's a noticeable increase in sound quality. It's pretty inconvenient that I even needed to purchase this device though. The build quality is fine to modern standards. I'm not going to test the durability of these headphones but the hinge on the cups seems to be metal. They are comfortable enough to wear for hours. There is a bit of weight to these. My old $200 (at the time) Sonys were 100% plastic so I really can't complain. Would like more metal but everything these days is made of too much plastic. There is a PROBLEM: THESE HEADPHONES DO NOT SUPPORT LDAC, and only support AptX Adaptive, AAC, and SBC. This is incredibly frustrating as these are supposed to be hi-fi, great sounding headphones. I purchased a AptX bluetooth adapter in hopes to get hi-fi working from my PC. I got these while on sale and using gift funds from my employer, so got the best bang for my buck. The price tag on these is a little too high. Definitely add these to your wishlist and wait till they go on sale (if they aren't now). TL:DR - Great headphones, but lack LDAC or mainstream AptX. You may experience latency issues as well which is not great for audio engineering (important for me) or gaming.

Bose é Bose e todos sabemos, mas esse aqui se supera! O ANC dele é algo de outro mundo e justifica o alto valor agregado. Pesquisei bastante antes de tomar minha decisão e valeu a pena! E para chamadas no celular o som do outro lado é cristalino, testei também gravando simples áudios no WhatsApp e todos elogiaram a sonoridade. Musicalmente é o que já esperamos de um Bose, incrivelmente prazeroso nos ouvidos! Vale sim cada centavo!

Fone bonito e de bom acabamento. Confortável e leve. Quanto ao som, possui muita qualidade, graves na medida sem ser exagerados,; bom volume. Pode se conectar com até 8 dispositivos o que é bastante útil. Bom isolamento de ruído. Não isola 100% mas diminui bastante o barulho externo. Utilizando o modo "silencioso" + música, não se ouve quase mais nada externamente. Possui , ainda, uma função "transparência" que é interessante quando é preciso se comunicar com outras pessoas. Nunca pude comparar com os top de linhas da senheiser, Apple ou Sony, mas posso afirmar que a qualidade de áudio é excelente.