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The Tesla II unit used in this headset, I mentioned in the previous T1 MKII evaluation article, it is an upgraded version of the Tesla unit, that is, from the unit point of view, It is better than the unit used by T1. It is slightly worse than the unit used by T1 MKII, but the positioning is different. The unit of T1 MKII is also separately adjusted according to the technology of Tesla II. As for this The price of more than 4,000 yuan can be said to be the top of the top of the monitor headphones? Let's look at the evaluation!
For the design of the product and the accessories that come with it, it is a professional background monitor headphone product. For the classic model DT770PRO that used to be by Yay Power, it looks like the appearance and accessories. The unit it uses has been improved. Let's take a look at these "surface kungfu" of this product! 
In this test, we mainly chose the combination of our HiFi channel evaluation reference platform Auralic brand suit Aries+Vega+ Taurus as a reference. 
For most of the top monitors, including the DT1770PRO, their sounds may have their own weights, but the style and characteristics are almost the same: it is not so "good". Of course, this kind of good is relative. But their voice is the same as you can't pick the problem and the wrong, because the monitor headphones should insist on the 100% restore the original appearance of the recording. Maybe many people will say that this is HiFi, it is high fidelity. But in fact, the monitoring is indeed closer to the literal meaning of HiFi, but often the enthusiasts rarely have to listen to. 
Undoubtedly as a top monitor, DT1770PRO is also such a product. And under the blessing of the second generation of Tesla, it is almost the highest quality, the most can be expressed and heard. Product. However, for most of the music interpretation, it is not as good as its own flagship T1 MKII, lacking overtones, loose feelings, music sounds more straightforward and dry. But you can find the most obvious in the recording, the system The problem, everything is also more sensitive on the speaker side. In terms of sound field, resolution, the DT1770PRO is a good headset, and the absolutely correct style in classical music makes it a very good one. Enjoy the headphones, of course, if you appreciate the records with excellent recordings. 
to sum up:
For the DT1770PRO, which is priced at more than 4,000 yuan, you may be able to buy a lot of headphones that are better than it at the same price, but you can't buy the correct and neutral sound performance like him. For the enthusiasts Say, I insist that maybe it is not the best choice, but it must not be the worst. But for studios, recording studios, this is almost the best monitor headphones now.
Not long ago, Beyerdynamic released two heavyweight products, a T1 MKII and a DT1770PRO. The former is the new flagship. The author has done detailed evaluations not long ago. For the latter, the author is also T1. MKII got it at the same time, but compared with the new flagship, it still suffered some neglect, but as a professional monitor earphone with a price of more than 4,000 yuan, it still received a lot of attention from enthusiasts. What's more, it still has The new Tesla II technology blessing. I have been using this product for a while, and I also think that I have a certain understanding of its sound performance. As a monitor headphone product, it is very consistent with this positioning in all aspects. And Beyerdynamic as the world One of the best dynamic manufacturers, the strength of the monitoring industry has always been not to be underestimated. And this new upgraded unit of the monitor headphones must also change for the high-end monitor headphones industry. First of all, in terms of accessories, this product is very professional with a product range. After opening the package, you can see a set of earphone bags, and on the headphone bag we can also see "Bai Ya Power Professional Audio". The English logo of the typeface. After opening the earphone package, you can see the earphones, and there are all the accessories. For the monitor headphones, the wire is generally a retractable wire that uses the telephone line, but for the enthusiasts and ordinary users. Naturally, I prefer the normal earphone cable. The DT1770PRO is also very intimate at this point. It has two wires, a telephone line and a traditional headphone cable. The length is 3M. ​​The wire connector defaults to a 3.5mm plug. All are equipped with adapters, I believe this is also a lot of ordinary entry monitor users can also use 3.5mm jacks on the general entry sound card. And not only there are two wires, but also two sets of earmuffs. The earphones use the most common cashmere earmuffs in the Beyerdynamic series earphones by default. In the earphone bag, we can see that a pair of leathers are also included. The earmuffs can be replaced by the user according to their own wearing and sound preferences. However, the author also hints here: the earmuffs will greatly affect the performance of the earphone sound, and the earmuffs are best selected and replaced based on sound. In the appearance of this earphone, it is still the Bayer power style that we are familiar with. The circular earphone cavity and the cavity connection at the rear of the earphone have a small moving coil unit ventilation hole. It can be said that this is one. Fully enclosed monitor headphones. The process of the head beam continues the style of Beyerdynamic, but the fineness of the workmanship has significantly improved. The adjustment of the head beam also uses the new look of the T1, and the sense of scale and feel. More obvious. DT1770PRO adopts the design of interchangeable line, single-sided outlet is also a common design of monitor headphones. The wire pin of this earphone uses a three-core mini XLR interface as the earphone pin, from the number of pins of the three cores. It is also certain that the balanced driver that the enthusiasts love is not possible to directly realize the change of the line on this earphone! AURALiC's Taurus second-generation amp. AURALiC developed the ORFEO Class A output module with the NEVE analog mixer design concept and equipped it in the second generation of Taurus, providing a powerful drive from 1000mW (600ohm) to 4500mW (32ohm). The ability to fully exploit the potential of each headset, showing the unique style of the headset. AURALiC also created a low-noise input circuit for the second generation of Taurus, enabling output noise below 5 microvolts And a dynamic range of over 130 decibels. Auralic's VEGA flagship decoder. This decoder is internationally renowned. It not only has megahertz upsell, femtosecond master clock, ORFEO class A output module and other breakthrough technologies from the rhyme, but also provides a rich feature port. , can connect a variety of digital audio sources and directly drive the power amplifier. In short, the sound of HiFi is more like the sound after adding the special effect "duang", it sounds more beautiful, the music is more emotional. The monitoring is not, the monitoring is a complete presentation to the music itself. Look, maybe you will sound like they are so loose, so thick and flowing compared to HiFi products. Even some music is not as good as it used to be. This is where the headphones are interesting and the value of them. It is for the studio, it is a working tool. For popular music, it is not so "friendly" to most popular pop music. It has no slanting mid-range to make people feel emotional. There is not a lot of low frequency to make pop music look more rhythmic. There is no very bright high frequency to make the overall transparency and penetrating power so powerful. So the recording problem of many popular music is also obvious. But for those recordings with excellent music quality, DT1770PRO is still a Very good neutral narrator. You can hear good voices and even hear more details.
Included in the package
Beyerdynamic DT1770PRO
The craft of the head beam is more detailed
The head beam telescopic part inherits the style of T1
Air channel air channel at the rear of the unit