Create a quiet and free wireless world: BOSE Quietcontrol 30 Active Noise Cancelling Bluetooth Headset Reviews
Before the sun alone also mentioned, since the crowded bus was stolen iphone I was very like the Bluetooth headset, and does not expose the location of the phone, and really experienced the freedom of wireless is addictive, and later gradually replaced a lot of Bluetooth headsets , from backbeat go first generation Qcy Qy8Jabra sport pulse Bluetooth headsets have experienced, daily commuting is very convenient. However, Aunt Zhang for so long, has been the noise reduction headphones Amway BOSE, when only QC20QC25, that is how amazing, aircraft train necessary. Then I went to the mall to experience it. It was really NB, but it was not convenient for the headset to be wired, and the most important thing was that it was expensive. As time moves, the ear is also a thing that can easily be spoiled. Listening earphones are getting more and more expensive. Although I haven’t reached the price of a few thousand blocks, when I see BOSE Quietcontrol 30, I’m not calm. This is not what I dream of headphones? No matter what the country line has not been on sale, after the first overseas launch did not directly start, thinking about 299 US dollars is still a little expensive, waiting for the black five to see if there are no preferential activities. Facts have proven that I think more, BOSE's price has always been strong, not updating will rarely lower prices, especially new products, so while the black line during the Black Five is back 10% discount and trans-shipment discount, the final price should be Around 1900 RMB, it is better to buy it sooner rather than later. Now it takes more than 2 months to talk about your experience.
Propaganda is greater than the actual effect: Qcy Qy8 Bluetooth headset since the previous two fruit machines were stolen because of the exposed position of the headset line, they turned to the camp of the Bluetooth headset, and the sense of freedom of the Bluetooth headset is deeper and deeper, when exercise It is also very convenient. The first time the backbeatgo Bluetooth headset was used, the Bluetooth headset was so small that it was so compact and firm, but it was purchased in 2012. At that time, it was still 459 oceans, and now the second generation is only 398. Plantronics (Plantr) | Like 19 Comments 13 Collections 13 View Details 
Fighter in Bluetooth Headset: Jabra Sport Pulse Bluetooth Headset Since IPHONE5 was plucked by the third hand during the crowded public gate, it would not have dared to listen to the song with a wired headset and connected to the IPHONE pocket (this case is also common). . Later on, they returned the Bluetooth headset of the BACKBEATGO1 generation. At that time, they had spent more than 400 ocean-buying purchases in 12 years. Today's generation of purchase links are few, and both are cheaper. Plantronics Back Likes 46 Comments 57 Collections 189 View Details 
Bose Quietcontrol 30 Wireless Headphones, Noise Cancelling - Black $299 StayHear® + Shark Fins Silicone Earphones US Amazon Direct Links View Encyclopedia 
â–³ QC30 box is relatively large, after all, the shape of the collar can not be folded, the cover is a magnifying glass of the headset cavity, unique shark fins are very eye-catching, in addition to the name QUIETCONTROL 30, next to the ACOUSTIC NOISE CANCELLING also stressed this selling point, referred to as ANC, It is noise cancellation technology.
â–³ Removed the outer package is a black box, eye-catching BOSE LOGO, look out of the box still more stained fingerprints.
â–³Then open the box by opening the page, and remove the plastic film at the beginning. The other opening methods will not destroy the box. Therefore, the second-hand appraisal should be careful, and the left and right lids should also be printed with headphones out of the street. Identifies support for IOS and Android systems.
â–³ remove the top of the headphone support, take out all the accessories below: headset bag, L and S pairs of earplugs, micro USB charging cable, all of the black material, and currently only this color.
â–³ charging line is very common, is the micro USB interface, relatively short, most people should have many such data lines, so do not worry about loss.
â–³ Because of the unique design of the collar, the headset bag is a pie-shaped, relatively large area, but fortunately thin, easy to carry around the daily commuting, positive BOSE LOGO, skin-like material is also more significant fingerprint.
△ Zipper can be opened after 180° flat, the design is relatively simple, the cover has an inner pocket can put data lines and other sizes of earbuds, because the collar is occupied by the outer ring, so placing things in the middle will not cause pressure of.
â–³ Let's take a look at the main body of QC30. This unique collar can be said to be the only controversial place. Many people feel ugly, like dog-hoofs, running beats, etc. But in my opinion, there are more advantages than disadvantages:
The first is the weight balance. It is difficult to shift left and right on the hanging neck. With only one ear plug, the other ear plug will not fall. Do not underestimate this. I used to feel a headache for me. For example, if I want to listen to ambient sounds on the road and remove an earbud, then I will walk a little while because the weight of the other earbud will lead to the headset cable getting more and more biased. One side of the earplugs, which eventually led to the other ear being pulled out, similar scenes with a friend walking with only one earbud to speak, and driving with only one earphone to answer the phone, etc., will appear, and sometimes take off clothes Bluetooth headsets are gone, but QC30 solves this problem perfectly.
There is no stethoscope effect, because the collar is fixed, so the earbuds have almost no stethoscope effect. The Bluetooth headsets used earlier have more or less this problem, except that JABRA SPORT PULSE does not, because its cavity design will completely fill the ears, there is a certain Soundproofing, almost no stethoscope effect, but it would be uncomfortable to wear for a long time, BOSE's shark fins will not plug their ears tightly, neither stethoscope nor wear for a long time.
As for good or bad, in the winter, it is almost invisible under the collar. In the summer, it depends on my own preference. I can accept it, and some people say that it is a dog collar, but after all, there is no closed loop before it, and even more than LG's. Money ring Bluetooth headset, I actually think this is much better.
Running beat, I think this is there, but I feel this is not suitable for exercise, because it is a kind of skin texture, it is very comfortable to wear, but think about my sweaty type skin mouse, 2 years It's not a good thing, so QC30 I will only use for commuting, will not go running, eliminate the problem of body sweat erosion.
And this collar is also necessary, because the large-capacity battery and noise reduction module need to be placed in place, the current Bluetooth headset, and even the "real wireless" in-ear Bluetooth headset, can not take into account the perfect noise reduction and high life, but it is currently Due to the limitations of science and technology, I believe there will be greater progress in the future.
â–³ right-ear wire control, very glad to still retain this traditional wire control, because the operation is still so convenient, I tried a lot of touch control and physical control on the headset cavity, after all, is not a headset, so small The space touch is difficult to be precise, but the physical buttons have to put pressure on the ears, and it's rather uncomfortable. The line control is the traditional volume addition and subtraction and playback pause button, double-click the song is familiar with the operation, easy to get started, pay attention to the online control side there are 2 small buttons, this is the QC30's hierarchical noise reduction control, you can The noise reduction from the weakest to the strongest, but there is no one-button switch noise reduction switch, even if it is transferred to the weakest noise reduction is turned on, maybe some people are not accustomed to, but after all, the remote control to such a position, count Do your best.
â–³QC30 has a BOSE LOGO on the back of the cavity, and each has a small MIC radio hole on the top and back. This is used to collect ambient noise for noise reduction.
â–³ favorite BOSE shark fin design, before the sun alone BOSE SoundTrue In Ear wired headset, dedicated to playing handheld, long wear without feeling, so far I have worn the most comfortable headphones, but may be noise reduction headphones The cavity of the QC30 is larger than the SoundTrue. The shark fin has no softness that the SoundTrue wears, but it is just a comparison of the home. Compared to other headphones, the wearing comfort of the QC30 is still quite good.
The inside of the right side of the â–³ collar is the power button, next to the battery and bluetooth icon, each with a small LED light, to facilitate the observation of the Bluetooth connection status and charge status, but the feel of this button is really bad, you have to use more habits, The advantage is that the power-on and power-off response is very quick and does not require a long press.
â–³ Not far from the switch is the charging port, there is a rubber dust plug design, it should also have a certain degree of waterproof function, but said before, this type of skin material I will not be used to exercise, after all, Haitao not Warranty, let people worry about this fragile dust plug connection, do not know how much can stand up, if it is broken it would be ugly.
â–³ Press and hold the switch. The LED icon of the Bluetooth icon flashes to indicate the connection. The Bluetooth light will turn on blue when connected.
BOSE Connect APP experience Many Bluetooth headsets will have their own APP, but to be honest, I think most of them are useless. It doesn't make any sense to play with tuning controls, or it is most comfortable to connect the phone without brain control, but this BOSE Connect APP It gave me a very good feeling, it is necessary to install, will be described in detail later.
â–³ I use the iphone6sp, search in the App store to find the download, follow the prompts to connect, connect very quickly.
â–³ in the settings you can see the product name can be changed, as well as automatically turn off the timer, the default is 1 hour, my personal recommendation is to change to 20 minutes, is no sound incoming, 20 minutes will automatically sleep, However, it does not shut down. When you pick up the phone and play music, the QC30 will automatically connect and play. This feature is very good. Then the language part of the prompt, there are many countries to choose from, although there is no country line, but can also choose to Simplified Chinese, it sounds very blunt, changed the English and Japanese are not good at the next try, or to switch back to Simplified Chinese. In the product details, you can also upgrade the firmware. You just got the 1.1.7 version. After the upgrade, it is 1.2.8, which is more of a music sharing feature.
â–³ In the APP interface, you can also adjust the noise reduction intensity by sliding the circle. You can see how much battery is left. You can see the icon of the two headphones in the lower left corner. That is the music sharing function. Is a device, connect a Bluetooth headset, another Bluetooth headset can also hear the same content through this feature, the premise is that all BOSE's Bluetooth headset, because I currently only QC30, so I can not experience.
These are actually dispensable for me. Why do you say that this APP is very necessary for me? The main function is as follows:
â–³ is the multi-device connection switching function, before buying QC30, I learned that BOSE can only connect two devices at the same time, this I feel slightly less, because their own terminal is still quite a lot, later found in this APP BOSE just said at the same time Connecting two devices does not mean that multiple devices cannot be connected.
â–³ Figure, click on the Bluetooth icon to enter the connection device interface, first of all your own iphone must be connected, or you can not control this app, when I connected the PSV, Mountain Spirit M1 player, HP portable notebook, and now I have connected 6 terminals, and you can connect to your desired device with just one click. Before this, my Bluetooth headset wanted to change other devices to be long-pressed and re-paired. The previous ones have been cleared. Even if it is possible to connect multiple devices, I do not know which devices are connected. This APP is clear at a glance. It is too convenient!
Noise reduction
A good choice for entry-level active noise canceling headphones: linner Listening ear ear headphones Foreword noise reduction headphones from BOSE's one big, now many manufacturers have come to try a cup of water, more and more consumers Also began to pay attention to the very important function of noise reduction, after all, most of the listening environment is outside, even the best headphones without a quiet environment are difficult to play real strength. In fact, this headset was very early in October in Aunt Zhang's public test here, at that time I was very interested, by the way, point to purchase, found that still in the Xuanyuan Feiying | Like 9 Comments 23 Favorites 26 View Details Previously written about linner listening ear noise reduction headphones, 199 yuan and 2000 yuan is not a level, so it is not a comparison, just for reference, linner is indeed a good choice for entry.
QC30 sound quality is normal in the absence of noise reduction, such as boiled water, but no linner kind of turbid feeling, low-frequency is not booming, try with closed eyes, then you may think this is not a headset can sell more than 2,000 yuan .
Turn on noise reduction to the strongest Some people say that QC30 has a feeling that the air in the ear has been emptied after noise reduction is turned on. This is also the first time I feel it. Although it is not a time, but with the adjustment process of noise reduction from weak to strong, this feeling will Gradually stronger, some people will feel unwell, but I think it is okay, I did not feel unwell, just feel inapplicable, I used to feel more after a period of time. After launching the noise reduction to the strongest, BOSE's unique feeling came out. The tri-band equalization, but not to mention the color, the sound field became bigger, and the resolving power was also good. There was no feeling of turbidity, and the sense of hearing was better than linner.
In the street, the sound of sidewalk drastically decreased, and the shuttle bus barely felt the sound of the bus engine. Although the noise reduction could not shield the vocals, the vocals farther away were greatly reduced, and it was difficult to hear without careful listening. The noise in the subway almost becomes a mosquito sound, but the broadcast sound can feel a bit, but the QC30 can adjust the intensity of noise reduction. Listening to a game and watching a TV show in such a noisy environment is simply a good experience. You can beat non-noise-reducing wired headsets. This experience is better than my previous backbeat go/Jabra sport pulse. If Linner's noise reduction is 5 points out of 10 points, QC30 will score 8.5 points. Because I experienced the QC35 and Dafa's MDR-1000X in the mall, the large unit and noise reduction function of the earmuffs are more excellent, but I may be entangled between the earmuffs. The combination of the noise reduction + Bluetooth + earbuds is only QC30. A.
Summarize the advantages Noise reduction effect is very good, BOSE sound quality in the Bluetooth headset also belongs to the upper level, 10 hours of life fully meet the daily commuting needs, as well as automatic sleep function, you can connect multiple terminals through the APP to switch, the collar can guarantee weight Balance does not shift the headphone position.
Although there are grading noise reduction, but there is no one-button switch, the weakest noise reduction actually open noise reduction. Although the skin-like material is comfortable, it does not eliminate the risk of sweat erosion and the collar design is not suitable for sports running. The micro USB charging port dust plug is frequently used with the risk of breakage.
Currently experiencing the best Bluetooth noise reduction earbud headphones, currently on the QC30 a choice (bold bold conditions, so the QC35 and Dafa 1000X is not within the conditions), see the news Sony also exhibited in the SCE a collar Bluetooth noise reduction Headphones, but did not announce more information, do not know how effective. I feel that this year and next year should be the year that noise reduction headsets rise. It is not BOSE's unique landscape. More and more manufacturers are paying attention to noise reduction. No matter how effective they are, they have more and better for consumers. select. If you want to experience the best experience of daily commuting and noise reduction, QC30 is especially recommended. Although there is currently no BNM, electronic products are bought early and enjoyed early.
Via in Pad PCB
What is Via in Pad? In shortly,via in pad is the via holes are at the SMD pad.The vias are very small,usually under 0.3mm.Why and how? First is there is no enough space to layout,you have to put the vias and holes closer even together.Second it helps thermal management and for high frequency boards,it may help improve signals.
Because the SMD pads are for SMD components loading,so the solder can not flow to inner layer or the other side when assemble.That is the most important for via in pad board.
How PCB manufacturers like us to do via in pad board? We will fill all vias with non-conductive epoxy and plate copper over it ,so the vias are flat same as others. Many PCB factories are unable to do such capability.
The key technology is how we fill vias and guarantee there is no any solder (surface finishing) in the holes.
Filled via in pad is a way to achieve intermediate density with an intermediate cost compared to using blind/buried vias. Some of the key advantages associated with using the via in pad technology are:
.Fan out fine pitch (less than .75mm) BGAs
.Meets closely packed placement requirements
.Better thermal management
.Overcomes high speed design issues and constraints i.e. low inductance
.No via plugging is required at component locations
.Provides a flat, coplanar surface for component attachment
Via in big pads are not a big problem.but for BGA,that is technology.As BGA pads are very small,10mil or 12mil,and there is no enough space.Manufacturing is not easy as other boards.
Via In Pad PCB,6Layer Via In Pad PCB,Touch Pad PCB,Via In Pad
Storm Circuit Technology Ltd , https://www.stormpcb.com