When I listen to music through the Liberty 2 Pro, I feel like I am sitting dead center in my own personal theater with my favorite band playing just for me. We purchase our own headphones and The Anker Soundcore Liberty 2 Pro earphones may not be the prettiest buds on the market, and their charging case is a bit awkward, but they … Anker impresses with shiny imprints, soft inlays - the whole unboxing experience. In our testing we got 8 hours and 35 minutes, which still isn’t the best we’ve ever tested but is actually slightly better than what Anker claimed so kudos to them. Soundcore Liberty 2 Pro im Test. Be part of the most informed community and take advantage of our advanced tools to find the best product for your needs. The Liberty 2 Pro are the closest thing to over-ear professional studio monitors that I’ve experienced in an earbud. With the design out of the way, we can get to talking about the good stuff — and there is a lot of good stuff. Anker Soundcore Liberty 2 Pro: Testwerte Die Mobilitätswertung der Anker Soundcore Liberty 2 Pro fällt dank des tollen Akkus sehr gut aus. Stunning graphics of the company’s audio hardware design are emblazoned across the interior of the folding cover, and the two buds and the charging case are displayed behind a transparent plastic cover. Die Ladebox lässt sich e… Though they do not have as long a battery life as their sports-focused brethren, the Spirit X2, the Liberty 2 Pro have a great 8 hours of battery life when looking at comparable earbuds with a performance focus. ), it’s a unique design choice that my eyes and hand… Compared to our usual standard, the Sony WF-1000XM3, the Liberty 2 Pro have a bigger sound and more powerful bass without losing any of the detail. They have a nearly 7-hour battery life which should last you almost an entire work day, and they do a good job at blocking out chatty coworkers to help keep you concentrated in the office. Despite arriving in a large box complete with a fold-out display, the buds and charging case are compact. Anker Soundcore Liberty 2 Anker Soundcore Liberty Air 2 Holyhigh BE1018 Aukey EP-B33 Xiaomi Air 2 Creative Outlier Gold Panasonic RP-HD610N JayBird X4 TaoTronics TT-BH072 GGMM T1. I use the smallest eartips and fins and they stay in my ears very well. It is priced at $149.99. Buy Soundcore Liberty 2 Pro at $142.99 on Aliexpress. At $150, they not only rule their price segment, beating out the excellent Jabra Elite 75t and RHA TrueConnect 2, but go even further and punch far above their weight class against buds that can cost twice as much. Luckily, their companion app gives you access to an 8-band graphic EQ so you can customize the sound to better suit your personal preferences. The case for these headphones holds three additional charges and can be charged via USB-C or wireless Qi charging, which is great. The Anker Soundcore Liberty 2 Pro are Bluetooth-only headphones that can't be used wired. 160 St-Viateur Est, Suite 408, Montreal, Canada, H2T 1A8, Anker Soundcore Liberty 2 Pro Truly Wireless, Anker SoundCore Liberty Air 2 Truly Wireless. According to Anker, they use four microphones. There's a large peak in high-mid and low-treble, and some peaks and dips through the treble range which may affect the presence of some vocals, but their biggest peaks are in high enough frequencies that they likely shouldn't be audible by most. What kind of $%#hole does the deed with headphones on? Though the lid slides back satisfyingly, the buds are set particularly deep in the case and sit in the cradle oddly. Their 7-hour battery life will almost get you through an entire work-day, and they do a good job at passively blocking out background chatter to help keep you motivated. The slight peak in high-bass likely shouldn't be too audible but may cause some slight boominess. The L/R drivers of our test unit were also extremely well-matched, which is important for the accurate placement and localization of objects (like voices or footsteps) in the stereo image. No cherry-picked units sent by brands. These truly wireless headphones are Bluetooth-only. These results are only valid for our unit and yours may perform differently. The mid accuracy of the Anker Soundcore Liberty 2 Pro is okay. Dort seht ihr auch die vielen kleinen Zubehörteile, die der Hersteller zur Anpassung der In-Ears zur Verfügung stellt: There is also no way to control volume on the buds themselves, which is another annoyance. The X3/X4s are just awesome - but I wanted true wireless and so I tried the Beats. And it's not just the box either. They last at least as long as the Sony WH-1000XM3s, are better than the 19.5 hours you get from the Panasonic Technics TWS AZ70s, and are vastly superior to the woeful 14 hours of the Master and Dynamic MW07s. The earbuds and the case are both made of dense, good quality plastic and feel fairly premium. The best noise-canceling earbuds for 2020, 1More True Wireless ANC review: Almost an AirPods Pro contender, The best Cyber Week Bluetooth speaker deals for 2020, The best Cyber Week headphone deals for 2020, The best Black Friday headphone deals for 2020, AirPods Pro are $80 OFF at Amazon for Black Friday — but not for long, The 50 best movies on Amazon Prime right now, The best new shows to stream on Netflix, Hulu, Amazon Prime, and more, Ultimate surround sound guide: From DTS to Dolby Atmos, every format explained, The best free TV show episodes on YouTube, The best online streaming services for movies and TV. They're also rated IPX4 for water resistance, though we don't currently test for this. Der Anker Soundcore Liberty 2 Pro ist der neue wireless In-Ear „Flagship-Kopfhörer“ des chinesischen Unternehmens. The XM3s sound great, but they lack in detail. Their out-of-the-box sound profile isn't flat, but has an excited, V-shaped profile that should be pleasing to most people but isn't the most accurate. That’s right, I think they sound better than an earbud that costs nearly twice as much. Soundcore Liberty 2 Pro: Audio. They aren’t the best for calls among all the earbuds we have tested – the Apple AirPods Pro are better – but they do a great job. I am going to break with our review tradition here and just come out and say it: The Soundcore Liberty 2 Pro are truly exceptional. Soundcore has an excellent app that is compatible with the Liberty 2 Pros and lets you change the EQ from the default sound profile (which is honestly pretty great) to one of 10 suggested calibrations from professional music producers, your own custom EQ, or a personalized sound profile that is put together based on a listening test you can perform through the app. The seal is snug with good sound isolation. Get your minds out of the gutter. When I first pulled the Liberty 2 out of the shipping box, I let out an audible “wow.” The product box is the nicest I’ve encountered of any audio product on my giant stack. Black, rubberized matte finish, and fits in your front pocket. Der Deckel wird spannenderweise nach hinten weggeschoben, was ein durchaus befriedigender Mechanismus ist, welcher auch etwas zum Spielen einlädt. The Samsung are more comfortable, have better controls, a much better-balanced and accurate sound profile, a better microphone, and a significantly longer single-charge battery life. They're the highest-end truly wireless in-ears that Anker makes and have a lot of features and an impressively premium look and feel. Das Gute vorweg, das hat der Hersteller in zwei von drei Punkten auch gut hinbekommen. This tool will clearly show you the differences, Use our data and table to find the best headphones for your needs, Want to see us review a specific headphones? The Anker Liberty 2 Pro are decently stylish and look fairly premium for a pair of budget-conscious truly wireless headphones. Although they have less continuous battery life than the Anker, they have five additional charges in their carrying case compared to Anker's three. Il pourrait s'agir des Soundcore Liberty Air 2 d’Anker, vendus à 130 euros. Their weighted group delay is well below the audibility threshold which should ensure a tight bass and a transparent treble reproduction. The Soundcore app also allows you to take complete control over the EQ and provides 22 preset profiles. The stereo imaging of the Anker Soundcore Liberty 2 Pro is excellent. Their continuous battery life of almost 7 hours is among the best that we've tested, and their case gives an additional three charges, which is good. The Anker Soundcore Liberty 2 Pro aren't recommended for wireless gaming. Anker SoundCore Liberty 2 Pro ⭐avis. I was able to wear them for hours without issue. The personalized profile through the app felt kind of gimmicky, and the profile it built for me wasn’t my favorite. The Sony WF-1000XM3 Truly Wireless are better than the Anker SoundCore Liberty Air 2 Truly Wireless. They aren't the most comfortable, but thanks to their design, they're better than some other in-ear options. The Sony have ANC, which gives them much better noise isolation, better controls, a more neutral out-of-the-box sound profile, a better app, and a better microphone. The Liberty 2 Pro manages to be both robust and detailed, which is surprising and impressive. The Anker Soundcore Liberty 2 Pro are Anker's highest-end truly wireless headphones. The Anker Soundcore Liberty 2 Pro probably has the most beautiful packaging of all wireless earphones under the 150 dollars mark. Grund genug, die In-Ears einem Test zu unterziehen. How to pair the Anker SoundCore Liberty Air 2. Der Hersteller verspricht Studio-Sound-Qualität. The microphone recording quality on the Anker Liberty 2 Pro is bad. If you were already considering these, you don’t have to read any further: Buy them. Somehow, Anker Soundcore managed to give me all the details across lows, mids, and highs that I crave while also keeping the balance pristine. It’s a tiny button on the top of the right earbud, and it’s set back. Not only can I hear the other side of the conversation very clearly, but they could hear me clearly as well. The Apple are slightly more comfortable, have better controls, and feel better-built. These headphones are Bluetooth-only and aren't compatible with an Xbox One or PS4. While you can map volume control to the buttons, unfortunately, it requires you to either double tap the button or hold it for 2 seconds, to adjust the volume by one level, and you can't hold to continuously raise or lower the volume. Soundcore is making a solid case for active noise-canceling tech not being necessary in earbuds. Like most in-ear headphones, the Soundcore Liberty 2 Pro don’t trap any heat inside your ear, so you shouldn’t notice a difference in temperature when wearing them. The Liberty 2 Pro sure looks professional. Die Anker Soundcore Liberty 2 Pro versprechen top Sound auf hohem Niveau samt starker Ausdauer. I cannot believe I’m saying this, but the Anker Soundcore Liberty 2 Pro have a wider, richer overall soundstage than any other earbud I’ve tested in 2020. While their charging case is a bit larger than some other options, it should still easily fit in most pockets and bags. The treble accuracy of the Anker Soundcore Liberty 2 Pro is excellent. Mit den Liberty 2 Pro Bluetooth In-Ear Kopfhörern liefert die Anker-Tochter Soundcore ein echtes Premium-Hörerlebnis. The case has a unique sliding lid that feels quite durable and should help prevent the case from accidentally opening. Open the charging case without removing the earbuds, this automatically powers them on. Like most Bluetooth headphones, their microphone is disappointing and your voice will sound thin and muffled to the person you're speaking to. Fast wie ein vom Wasser rund geschliffener Stein wirkt die Ladestation. Their excited sound profile means that almost the entire mid-range is recessed, pushing most lead instruments and some vocals further back in the mix. It feels quite premium with a nice matte finish and includes wireless charging capabilities that should work with any Qi-enabled charger. Once you achieve a proper fit and seal with the included tips, you'll likely get consistent bass and treble response every time you use the headphones. On the upside, all four available buttons (double-tap and long hold on each ear) are re-programmable within the app. Das erste was an den Liberty 2 Pro auffällt, ist die schicke Ladebox! For $150, we have not yet encountered a better-sounding pair of buds. Das Unboxing darf natürlich nicht fehlen und steht euch bei YouTube zur Verfügung. The noise isolation of the Anker Soundcore Liberty 2 Pro is decent. Anker Soundcore offers an incredible 18-month warranty for their products, which is well above the norm. Like all truly wireless headphones, the Liberty 2 Pro are very compact and portable. They don’t match the 13 hours of the Sony WF-SP800N or the 9.5 hours out of the RHA TrueConnect 2, but they do beat the Jabra Elite 75T, which only get about 7 hours in our testing. No problems here. You want them. can it be, that the problem is at a moment only with the aptX Codec and will be fixed in a few days… A little bit to my person: I’m 40 years old and hear often music over my … The Anker Soundcore Liberty 2 Pro are outstanding earphones with the best high-quality, detailed soundstage we’ve encountered in true wireless buds. Die Zahl an In-Ear-Kopfhörern, die komplett kabellos funktionieren, wächst. They can match the raw bass power from the Jabra Elite 75T, and have a deeper and more robust projection of that bass. Dubbed HearID, this feature will require you to take a short audio test using a Soundcore mobile app. The Jabra are more comfortable, have much better controls, feel better built, are much more accurate out-of-the-box, and have a better microphone. These headphones can only be used via Bluetooth on PCs and aren't compatible with the PS4. These headphones feel very stable in your ear. Anker Soundcore says they achieve the solid call quality through four microphones and uplink noise reduction and voice isolation. The headphones are rated IPX4 for water resistance, though we don't currently test for this. Editor’s note: this Anker SoundCore Liberty Air 2 review was updated while using firmware version 10.11. Die Akkulaufzeit kann sich mit bis zu 8 Stunden (In-Ears) bzw. Next, let’s talk about the buds themselves: They’re bulky. So you can remix, optimize, and personalize to perfection. insgesamt 32 Stunden wirklich sehen lassen. The Anker Soundcore Liberty 2 Pro have an excited sound profile out-of-the-box, with their bass and treble raised and their mid-range recessed. On the other hand, the Anker have a longer overall battery life, and a better app that provides a graphic EQ. Anker Soundcore Liberty 2 Pro im Test: Design, Tragekomfort und Etui. Upgrade your lifestyleDigital Trends helps readers keep tabs on the fast-paced world of tech with all the latest news, fun product reviews, insightful editorials, and one-of-a-kind sneak peeks.Digital Trends may earn a commission when you buy through links on our site. When worn and playing music even at a low volume, sound is so well isolated, I could swear they had noise canceling. Unfortunately, they don't have ANC like some higher-end options like the Sony WF-1000XM3 Truly Wireless or the Apple AirPods Pro, but they're available for significantly cheaper and overall provide a good price-to-performance ratio. We buy our own products to test. Soundcore is making a solid case for active noise-canceling tech not being necessary in earbuds based on how excellent these are with noise isolation. While probably more aesthetic than anything (it might last longer without a hinge? so that you can compare the results easily. put them under the same test bench, The Liberty 2 Pro shouts it's premium enough to compete with the likes of Sony and Sennheiser. Der L… While it feels durable enough, it could potentially break if dropped on the wrong angle, or with enough force, though it's unlikely. See our recommendations for the best truly wireless earbuds, the best wireless earbuds, and the best wireless earbuds for running. While it isn't the most neutral and balanced, it's tuned well for a wide variety of genres and should please most people. Their sound profile is better balanced and neutral while their active noise cancelling helps to block out noise around you. If sound quality is of foremost importance to you, the Liberty 2 Pro are going to be hard to beat. The microphone on these headphones is integrated into the earbuds. I am not familiar with their lingo or technology, but I can say it works very well, making these buds not only excellent for music but also for work. The Anker Soundcore Liberty 2 Pro's weighted harmonic distortion is very good. Die Anker Soundcore Liberty 2 Pro möchten eine Mischung aus gutem Sound und fairem Preis bieten. The Anker Soundcore Liberty 2 Pro is a new hybrid single dynamic and single BA driver TWS with up to 32 hours of playtime and aptX. This box is so nice I am inclined to keep it for as long as I have the buds. While the case feels quite sturdy, the weak point would likely be the sliding lid. The seven eartip sizes provided here is way beyond industry average and certainly helps with the comfort (more on that later). It offers 20 EQ presets as well as an 8-band graphic EQ to fully customize your sound. Diese ist dem Preis von 100€+ durchaus angemessen. I've always loved the Jaybird brand because of how incredible the sound and their eq app is. The box has a very satisfying texture, which hopefully can be seen here. You can also use the app to button-map the four available button combinations. This makes them a good option for sports as you shouldn’t sweat more than usual. Auch das „Fast Charging“ mit 10 Minuten Laden für zwei Stunden Musikgenuss ist praktis… Create your customized sound profile for a more immersive listening experience with these Anker Soundcore Liberty 2 Pro earphones. Dazu gibt es noch die „HearID“-Klangpersonalisierung und die Anpassungen für die beiden Buttons auf den „Stöpseln“. While you can connect them to a Bluetooth-enabled PC, their latency is likely too high to be used for gaming. I've purchased 4 pairs of sports friendly earbuds over the past 12 months. I have a heck of a time keeping the Sony WF-1000XM3s in my ears, and the very comfortable Master and Dynamic MW07s do a very poor job isolating. The bass accuracy of the Anker Soundcore Liberty 2 Pro is excellent. Anker includes seven different size tips as well as three sizes of stability fins to help you find the best fit. All frequencies fall within very good limits, which should result in a clear and pure audio reproduction. I’ve seen worse environmentally friendly boxes that provided much less of an impact. The Anker Soundcore Liberty 2 Pro are a good option if you like truly wireless headphones. Like all closed-back in-ear headphones, their soundstage is poor. Thanks to their design, the majority of the earbud sits outside of your ear so it shouldn't put too much pressure and cause fatigue after extended listening periods. Given how robust the box is and the plastic tubs found inside it, I can’t give Anker the nod when it comes to sustainability, but at least they seemingly went all-out with the first impression. Here you can vote for our next review, Compare frequency and distortion of headphones to make a clearer and more informed decision. This means that vocals and cymbals should sound present and shouldn't be piercing or painful. Ein paar bunte Varianten wären sicher nicht verkehrt. Anker Soundcore Liberty 2 Pro FW 01.22 iPhone uses the AAC Codec, because it’s an iPhone. They look similar to the Sony WF-1000XM3 when they're in the ear and our unit have a nondescript, sleek black and dark grey matte finish, though they're also available in white. That noise isolation means the buds are pretty snug in your ear, and if you’re particularly sensitive to pressure in your ear canal, I could see these creating some fatigue. On the other hand, the Anker have a better app that includes a graphic EQ and have a slightly longer overall battery life, including the charging case. Personally, I like the fit. Unfortunately, the Liberty 2 Pro do not have any kind of sensor to detect when a bud is removed from your ears, so you’ll have to manually pause music. The person on the other end of the line should have no problem hearing you in quiet situations, but likely won't hear you in even moderately loud environments like a busy street. Der neueste Test erschien am 04.11.2020. They come with six different size tips as well as three sizes of stability fins to help you find a secure and stable fit; once you do they feel very stable in your ears and likely won't fall out while working out. These Bluetooth-only headphones aren't compatible with the Xbox One. The battery life of these headphones is passable overall, but very good for truly wireless headphones. On the other hand, the Anker feel much more stable in the ear thanks to their stability fins. Initially pairing the earbuds is super simple, and requires just moments. They're great for using in the gym thanks to their stable fit and IPX4 rating for water resistance, though we don't currently test this. The Samsung are more comfortable, have a more balanced sound profile out-of-the-box, block out more background noise, have a better microphone, and have a longer continuous battery life. Even when I change the EQ to throw the bass as high as it will go, it never overwhelms any of the other levels. The Anker Soundcore Liberty 2 Pro are decent headphones for neutral sound. Most buds on the market snap into place either with the eartips (like the WF-1000XM3) or antennae (like the Airpods) facing down. The Anker Soundcore Liberty 2 Pro is the new wireless in-ear flagship headphone from the Chinese company. It can also be charged via USB-C and there's a rubber stopper to prevent the port from getting dust and moisture in it. The Anker Liberty 2 Pro are Bluetooth-only truly wireless headphones that support aptX, which is good. The Anker Soundcore Liberty 2 Pro earphones may not be the prettiest buds on the market, and their charging case is a bit awkward, but they make up for all of that with the best audio quality you can expect out of true wireless earbuds. But if you’re wondering why I am so enamored with these particular buds, I have a lot to say. Disclaimer: The Anker Soundcore Liberty 2 Pro sent to us is a sample in exchange for our honest opinion in this review. When a product is discontinued or no longer popular, we sell the purchased products locally in Montreal, Canada. You can see what products we currently have for sale. Here, though, they stumble. Though they are not going to be the best to wear on an airplane with no music playing, they do a great job without ANC. I’ve been using these for a couple of weeks now and each time I still have to fiddle with them. It will also be difficult for them to hear you if you're in even a moderately noisy environment. An additional three charges in the case brings the total listening time to 32 hours. Diese Laufzeit überragt damit schon das Niveau diverser Bluetooth-Over-Ear -Kopfhörer. The Apple AirPods Pro Truly Wireless are better wireless headphones than the Anker Soundcore Liberty 2 Pro Truly Wireless. Honestly, if audio quality is what you care most about, no. Ils sont une bonne alternative aux AirPods Pro, pour un tarif bien plus raisonnable. Like most Bluetooth headphones, the speech recorded with this microphone will sound muffled and lacking in detail. Soundcore hatte sich mit diesen Kopfhörern ein hohes Ziel gesteckt: Für einen relativ günstigen Preis einen Spitzenklang zu liefern. The Samsung Galaxy Buds+ Truly Wireless are better truly wireless in-ears than the Anker SoundCore Liberty Air 2 Truly Wireless. Gain early access to all tests results for new products, Prices will now be listed directly in reviews and tables, Have 5 votes per product category to choose which product we’ll review next, Gain unlimited access to detailed test results in tools and results (no blurred results), Best Noise Cancelling Earbuds And In-Ears, Best Noise Cancelling Headphones Under $100, Best Noise Cancelling Headphones Under $200, Best Wireless Bluetooth Earbuds For Running, Best Wireless Bluetooth Headphones Under $100, Best Wireless Bluetooth Earbuds Under $50, Bose QuietComfort Earbuds Truly Wireless Review, Turtle Beach Stealth 700 Gen 2 Wireless Review, Having trouble deciding between two headphones? The case, instead of the typical hinging treasure-chest type setup, slides open with a flick of your finger. All rights reserved. Anker Soundcore Liberty Air 2 im Test In Sachen Mobilität trumpfen die Anker Soundcore Liberty Air 2 groß auf und schneiden im Test sehr gut ab. You don’t notice their girth when you’re wearing them, but they do stick out from your head to a considerable degree, and anyone around you is going to be acutely aware of the buds; they are impossible to ignore. That’s not to say I think the case is big, but it’s certainly one of the larger of the ones I have on hand. Um diesen zu testen, habe ich den Klang in drei Punkte aufgeteilt: Musik, Hörbuch und Telefon. Unfortunately, our Bluetooth dongle had issues connecting to these headphones so we were unable to test their SBC latency. They're great for using in the gym thanks to their stable fit and IPX4 rating for water resistance, though we don't currently test … You certainly won’t accidentally hit this button, which I suppose is a nice benefit, but it’s much easier to handle controls on your phone or smartwatch. However, considering how high their aptX latency is, we'd expect their SBC performance to be slightly worse and they likely aren't a good option for watching video content. The Liberty 2 Pro are the Goldilocks of this situation for me: They’re just right. I expect these to last several years, easily. The Anker Liberty 2 Pro's controls are sub-par. Unfortunately, due to their design, they protrude quite a bit out of the ears. I applaud the effort, but I’ll stick with custom EQ. Anker is not afraid of criticism and presents the Soundcore Liberty 2 Pro with ten such Grammy Award-winning audio producers who all say that these true wireless in-ears are pretty good. Faltet man den kräftigen Karton auf, zeigen sich die Liberty 2 Pro In-Ears und das Ladecase auf der einen Seite von ihrer besten Seite. The Anker Soundcore Liberty 2 Pro are a decent option for mixed usage. Good companion app with graphic EQ and lots of presets. This is because creating an out-of-head and speaker-like soundstage is largely dependent on activating the resonances of the pinna (outer ear). Das erste Alleinstellungsmerkmal findet beim Deckel. They're compatible with the great Soundcore app, which gives you access to a graphic EQ as well as presets, but their excited out-of-the-box sound profile should please fans of most genres. On the other hand, the Liberty 2 Pro are more stable and have a better battery life. They also leak very minimal audio, so you should be able to listen to your music fairly loud without bothering those around you. For me, the Soundcore Liberty 2 Pro are the new standard. Their charging case charges via USB-C, and a 1.9ft cable is included. Lets start with the case: It feels much larger than it needs to be, and the buds don’t sit in it intuitively. ACAA beschreibt die … And given the IPX4 water resistance rating, I’d trust them for long runs and other sweat inducing activities. One final note: Though you can pause/play/skip, power on and off, and answer/hang up calls with the Liberty 2 Pro, the button to do so is extremely small and poorly located. In Hans Zimmer’s No Time for Caution, I feel like I’m sitting in the Imax theater, watching Interstellar for the first time again. additional silicon eartips, and two additional wings that help hold the buds in place when worn. Unfortunately, the headphones connect to your device as soon as the lid is opened, which is somewhat common for truly wireless headphones, but may cause the battery to drain if the case accidentally opens. While I have to really stop and listen carefully in order to pick out the background detail of Katy Perry’s Daisies on both the Sony and the Jabra, it’s clear and obvious on the Liberty 2 Pro. The noise handling of the microphone is disappointing.

Notre-dame De Paris Site Officiel, Dst Enseignement Scientifique, Absolut Vodka 1l Prix, Flocage Officiel Intersport, Vacances Soleil Covid, Adverbe En Début De Phrase, Loi Jardé Code De La Santé Publique, Adieu Berthe Critique, Enseignement à Distance Paris 4, Génie Electrotechnique Pdf,