When talking about "high-end" Bluetooth speakers that cost more than $1,000, you may think of first-tier foreign companies such as Bose, JBL, Bang & Olufsen (B & O) or KEF. The well-known audio brand in the crowd.
In addition to the simple brand plot, most consumers are willing to spend more money to buy high-end Bluetooth speakers, the fundamental reason is to get better sound quality, and once the product is printed on these brands of logo, often means that the sound quality is at least a certain Guaranteed, this is the natural result of the technology's precipitation over the years.
In contrast, among the numerous Bluetooth speakers launched by domestic brands, it is worth mentioning that products with a price of more than 1,000 yuan and products with a price of around 500 yuan are all "rare animals." In this context, Edifier launched a Bluetooth speaker, Rambler M7, which costs $1398.
As a domestic first-line speaker brand, Edifier's speaker products have a good reputation, but its products are more often associated with "cost-effectiveness". What is the performance of the high-priced product of the Rambler M7? More importantly, can the quality of the M7 be "first match" with the products of foreign big-line manufacturers?
Not the average big
To be honest, the experience of the wanderer M7 out of the box is relatively poor. Whether it is the material of the packaging carton, the font printing, or the bag wrapped in the outer layer of the speaker, the M7 seems to have little difference with the two or three hundred Bluetooth speakers of the walker, and “quality The sense of vocabulary is obviously nothing. After opening the M7's packaging, you can feel a pungent rubber smell. As a high-end positioning product, the walker needs more effort in packaging.
In addition to packaging, we also want to take a look at the M7's charging head. This charging head is not only cheap, but also has a 14V 1.4A input power. The charging plug does not use the standard Micro USB or Type-C interface and cannot be charged using the phone adapter.
Take out Rambler M7, the first feeling is big, not an ordinary big...
Rambler M7's "Silicon" has reached 294 X 170 X 67 mm and weighs 1.9 kg. In the impression, except for the JBL Etreme, there are very few Bluetooth speakers that can "compare" the Rover M7 in size and weight. Putting together the BeoPlay A1 and Bose Soundlink Mini, two small Bluetooth speakers in our eyes, the Rambler M7 is even more exaggerated.
BeoPlay A1 and Rambler M7
Why do you want to make Bluetooth speakers so big? Why can't Bluetooth speakers talk about sound quality? In the article, we mentioned that the sound quality of Bluetooth speakers is generally poor. In addition to the loss caused by Bluetooth audio transmission, a relatively small volume results in insufficient space for acoustic design. This is another important reason. The reason why the rambler M7 has made such a large volume is that it can make a breakthrough in sound performance.
As the most expensive Bluetooth speaker Edifier has ever had, the Edifier M7 has taken a lot of thought in design and craftsmanship.
Edifier M7 looks like a retro radio, the top handle is made of aluminum alloy material, the surface has been brushed, feel good, this handle can be fixed at 45 degrees, 90 degrees, these two positions, The M7 lies flat on the table. The handle can also act as a stand to change the sound.
In the mask part, M7 is also made of aluminum alloy material, the surface is sandblasted, the level of process is quite good, even in the curved part, it does not feel scratching hand touch.
In addition to the mask and the handles, the rest of the M7 is made of silicone, and a silicone cap is added to the charging port, USB, and AUX ports to achieve a certain amount of splashing capacity. You do not need to worry about spilling water on the speakers. . However, since the M7's waterproof rating is only IPX4, it is best not to use it in the bathroom for background music.
In addition, unlike many home-made bluetooth speakers that like to pack a variety of "variety" features, the M7's function is very "special." In addition to Bluetooth music playback (support apt-X) and AUX linear input, M7 also has built-in NFC (and built-in NFC phone can quickly complete Bluetooth pairing), you can charge other devices through the USB port on the body. In addition, there are no radios, SD card slots, built-in sound and cartoon communication.
In terms of endurance, the data provided by the Rambler official is 8 hours, and the measured data can almost reach this level at a moderate volume and the performance is relatively normal.
"Rubber" foot, good sound quality
Thanks to ample internal space, the "stuff" inside the Rambler M7 is luxurious.
The M7 is equipped with two 2.75-inch (about 70 mm) aluminum basin subwoofer units and two 19-mm silk screen tweeters. In order to further improve the low-frequency feel, the M7 is also equipped with 3 passive diaphragms.
Edifier M7 Official "Explosion Map"
In Bluetooth speakers, this internal specification is extremely rare. In contrast, the Bose SoundLink Mini II has two 1-inch full-range units (left and right channels respectively), and the BeoPlay A1 uses a "treble unit + bass unit" design.
To drive these four speakers, the Rambler M7 used two TAS5707 digital amplifiers from Texas Instruments and two DSP digital dividers in the divider section.
Considering the positioning of products and the comparison of sound quality, we found BeoPlay A1 and Bose SoundLink Mini II as contrasts. The official selling prices of these two products are all around 1900 yuan, which is also the two best sound quality we have heard before. Bluetooth Speaker. At the same time taking into account the use of the scene, the following evaluation of the sound part are based on Bluetooth mode, playback device for the iPhone 7.
Compared to BeoPlay A1, the sound style of the Rambler M7 is significantly different. BeoPlay A1 has more low-frequency content, is more flexible, has a more prominent vocal part, and is more extensible. The overall feeling of the sound is more “transparentâ€. In contrast, the sound of the rambler M7 has a lot of "rules". The first is not "grabbed" by BeoPlay A1. Thanks to the two pairs of high and low frequency units inside, the sound field of the Rambler M7 is significantly better than that of the BeoPlay A1. Big circle. In terms of sound quality, the Ramblers M7 and BeoPlay A1 are considered to be "each with its own merits."
Compared with the Bose SoundLink Mini II, the sound style of the two is somewhat similar, but the low frequency of the Bose SoundLink Mini II is softer (this is also the most important reason for many people to buy the SoundLink Mini II), but the Edifier M7 is in the middle and high frequencies. The sound field has obvious advantages. Put the two products together, simply from the sound point of view, I will choose to maverick M7.
The best sound quality of domestic bluetooth speakers
From the sound quality point of view, evaluating the internal exaggerated "stacking material" and the technical accumulation of the rambler in the speaker field for many years, the rambler M7 gave us no small surprise, its sound quality has been completely comparable to or even surpass some international brands. Top Bluetooth speakers. On the domestic Bluetooth speaker, the Rambler M7 is the best sound quality we have heard so far.
However, limited by "body size", compared to BeoPlay A1, Bose SoundLink Mini II and other products, the use of Edifier M7 is relatively more limited. The position of the Rambler M7 should be between the Bluetooth speaker and the desktop 2.0 box. It is suitable for users who are not satisfied with the sound quality of ordinary Bluetooth speakers, but do not want to buy a pair of 2.0 speakers that are more space-consuming and difficult to move.
As Edifier's first Bluetooth speaker, which costs more than $1,000, we believe that the Rambler M7 is worthy of a good rating. However, in order to gain a foothold in the high-end Bluetooth speaker market, the walker needs to spend more time on "external" packaging, accessories, and design.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.
In contrast, among the numerous Bluetooth speakers launched by domestic brands, it is worth mentioning that products with a price of more than 1,000 yuan and products with a price of around 500 yuan are all "rare animals." In this context, Edifier launched a Bluetooth speaker, Rambler M7, which costs $1398.
As a domestic first-line speaker brand, Edifier's speaker products have a good reputation, but its products are more often associated with "cost-effectiveness". What is the performance of the high-priced product of the Rambler M7? More importantly, can the quality of the M7 be "first match" with the products of foreign big-line manufacturers?
Not the average big
To be honest, the experience of the wanderer M7 out of the box is relatively poor. Whether it is the material of the packaging carton, the font printing, or the bag wrapped in the outer layer of the speaker, the M7 seems to have little difference with the two or three hundred Bluetooth speakers of the walker, and “quality The sense of vocabulary is obviously nothing. After opening the M7's packaging, you can feel a pungent rubber smell. As a high-end positioning product, the walker needs more effort in packaging.
In addition to packaging, we also want to take a look at the M7's charging head. This charging head is not only cheap, but also has a 14V 1.4A input power. The charging plug does not use the standard Micro USB or Type-C interface and cannot be charged using the phone adapter.
Take out Rambler M7, the first feeling is big, not an ordinary big...
Rambler M7's "Silicon" has reached 294 X 170 X 67 mm and weighs 1.9 kg. In the impression, except for the JBL Etreme, there are very few Bluetooth speakers that can "compare" the Rover M7 in size and weight. Putting together the BeoPlay A1 and Bose Soundlink Mini, two small Bluetooth speakers in our eyes, the Rambler M7 is even more exaggerated.
Why do you want to make Bluetooth speakers so big? Why can't Bluetooth speakers talk about sound quality? In the article, we mentioned that the sound quality of Bluetooth speakers is generally poor. In addition to the loss caused by Bluetooth audio transmission, a relatively small volume results in insufficient space for acoustic design. This is another important reason. The reason why the rambler M7 has made such a large volume is that it can make a breakthrough in sound performance.
As the most expensive Bluetooth speaker Edifier has ever had, the Edifier M7 has taken a lot of thought in design and craftsmanship.
Edifier M7 looks like a retro radio, the top handle is made of aluminum alloy material, the surface has been brushed, feel good, this handle can be fixed at 45 degrees, 90 degrees, these two positions, The M7 lies flat on the table. The handle can also act as a stand to change the sound.
In the mask part, M7 is also made of aluminum alloy material, the surface is sandblasted, the level of process is quite good, even in the curved part, it does not feel scratching hand touch.
In addition to the mask and the handles, the rest of the M7 is made of silicone, and a silicone cap is added to the charging port, USB, and AUX ports to achieve a certain amount of splashing capacity. You do not need to worry about spilling water on the speakers. . However, since the M7's waterproof rating is only IPX4, it is best not to use it in the bathroom for background music.
In addition, unlike many home-made bluetooth speakers that like to pack a variety of "variety" features, the M7's function is very "special." In addition to Bluetooth music playback (support apt-X) and AUX linear input, M7 also has built-in NFC (and built-in NFC phone can quickly complete Bluetooth pairing), you can charge other devices through the USB port on the body. In addition, there are no radios, SD card slots, built-in sound and cartoon communication.
In terms of endurance, the data provided by the Rambler official is 8 hours, and the measured data can almost reach this level at a moderate volume and the performance is relatively normal.
"Rubber" foot, good sound quality
Thanks to ample internal space, the "stuff" inside the Rambler M7 is luxurious.
The M7 is equipped with two 2.75-inch (about 70 mm) aluminum basin subwoofer units and two 19-mm silk screen tweeters. In order to further improve the low-frequency feel, the M7 is also equipped with 3 passive diaphragms.
In Bluetooth speakers, this internal specification is extremely rare. In contrast, the Bose SoundLink Mini II has two 1-inch full-range units (left and right channels respectively), and the BeoPlay A1 uses a "treble unit + bass unit" design.
To drive these four speakers, the Rambler M7 used two TAS5707 digital amplifiers from Texas Instruments and two DSP digital dividers in the divider section.
Considering the positioning of products and the comparison of sound quality, we found BeoPlay A1 and Bose SoundLink Mini II as contrasts. The official selling prices of these two products are all around 1900 yuan, which is also the two best sound quality we have heard before. Bluetooth Speaker. At the same time taking into account the use of the scene, the following evaluation of the sound part are based on Bluetooth mode, playback device for the iPhone 7.
Compared to BeoPlay A1, the sound style of the Rambler M7 is significantly different. BeoPlay A1 has more low-frequency content, is more flexible, has a more prominent vocal part, and is more extensible. The overall feeling of the sound is more “transparentâ€. In contrast, the sound of the rambler M7 has a lot of "rules". The first is not "grabbed" by BeoPlay A1. Thanks to the two pairs of high and low frequency units inside, the sound field of the Rambler M7 is significantly better than that of the BeoPlay A1. Big circle. In terms of sound quality, the Ramblers M7 and BeoPlay A1 are considered to be "each with its own merits."
Compared with the Bose SoundLink Mini II, the sound style of the two is somewhat similar, but the low frequency of the Bose SoundLink Mini II is softer (this is also the most important reason for many people to buy the SoundLink Mini II), but the Edifier M7 is in the middle and high frequencies. The sound field has obvious advantages. Put the two products together, simply from the sound point of view, I will choose to maverick M7.
The best sound quality of domestic bluetooth speakers
From the sound quality point of view, evaluating the internal exaggerated "stacking material" and the technical accumulation of the rambler in the speaker field for many years, the rambler M7 gave us no small surprise, its sound quality has been completely comparable to or even surpass some international brands. Top Bluetooth speakers. On the domestic Bluetooth speaker, the Rambler M7 is the best sound quality we have heard so far.
As Edifier's first Bluetooth speaker, which costs more than $1,000, we believe that the Rambler M7 is worthy of a good rating. However, in order to gain a foothold in the high-end Bluetooth speaker market, the walker needs to spend more time on "external" packaging, accessories, and design.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.
Scope of supply
Rating: Up to 200MVA
Voltage:Valve side voltage up to 1000VDC, Grid side voltage up to 220KV
Double star and double bridge
Applications:
The rectifier transformers are mainly used in the electrolysis processes for production of different kind of metals, such as aluminum electrolyzing, magnesium electrolyzing, copper electrolyzing, zinc electrolyzing and other more applications. The largest installed rectifier transformers are always for aluminum electrolysis with some transformer/rectifier combined units in parallel operation to get the required DC current.
Design:
The rectification method is normally known as double star or double bridge. Double star systems use an interphase transformer (IPT) and are usually applied as 6 or 12pulse units where high currents are required with very low nominal voltages. Double bridge system is applied as 6, 12, 24, 48 or 60pulse systems, as required to suit the harmonic mitigation and process stability requirements.
Duty
Electrolysis is normally a continuous process, but with a constant high loading and current harmonics.
Why SCOTECH
Long history- Focus on transformer manufacturing since 1934.
Technical support – 134 engineers stand by for you 24/7.
Manufacturing-advanced production and testing equipment, strict QA system.
Perfect service-The complete customer service package (from quotation to energization)
Rectifier Transformer,Bridge Rectifier Transformer,12 Pulse Rectifier Transformer,High Voltage Rectifier Transformer
Jiangshan Scotech Electrical Co.,Ltd , https://www.scotech.com